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Outputs (165)

The VST ATLAS quasar survey I: Catalogue of photometrically selected quasar candidates (2023)
Journal Article
Eltvedt, A. M., Shanks, T., Metcalfe, N., Ansarinejad, B., Barrientos, L., Sharp, R., …Zhou, Z. (2023). The VST ATLAS quasar survey I: Catalogue of photometrically selected quasar candidates. Monthly Notices of the Royal Astronomical Society, 521(3), 3384-3404. https://doi.org/10.1093/mnras/stad516

We present the VST ATLAS Quasar Survey, consisting of ∼1229 000 quasar (QSO) candidates with 16 < g < 22.5 over ∼4700 deg2. The catalogue is based on VST ATLAS+NEOWISE imaging surveys and aims to reach a QSO sky density of 130 deg−2 for z < 2.2 and ∼... Read More about The VST ATLAS quasar survey I: Catalogue of photometrically selected quasar candidates.

VST ATLAS galaxy cluster catalogue I: cluster detection and mass calibration (2023)
Journal Article
Ansarinejad, B., Murphy, D., Shanks, T., & Metcalfe, N. (2023). VST ATLAS galaxy cluster catalogue I: cluster detection and mass calibration. Monthly Notices of the Royal Astronomical Society, 520(1), 1371-1389. https://doi.org/10.1093/mnras/stac3815

Taking advantage of ∼4700 deg2 optical coverage of the Southern sky offered by the VST ATLAS survey, we construct a new catalogue of photometrically selected galaxy groups and clusters using the ORCA cluster detection algorithm. The catalogue contain... Read More about VST ATLAS galaxy cluster catalogue I: cluster detection and mass calibration.

The local hole: a galaxy underdensity covering 90 per cent of sky to ≈200 Mpc (2022)
Journal Article
Wong, J. H., Shanks, T., Metcalfe, N., & Whitbourn, J. (2022). The local hole: a galaxy underdensity covering 90 per cent of sky to ≈200 Mpc. Monthly Notices of the Royal Astronomical Society, 511(4), 5742-5755. https://doi.org/10.1093/mnras/stac396

We investigate the ‘Local Hole’, an anomalous underdensity in the local galaxy environment, by extending our previous galaxy K-band number-redshift and number-magnitude counts to ≈90 per cent of the sky. Our redshift samples are taken from the 2MASS... Read More about The local hole: a galaxy underdensity covering 90 per cent of sky to ≈200 Mpc.

The nature of sub-millimetre galaxies II: an ALMA comparison of SMG dust heating mechanisms (2022)
Journal Article
Ansarinejad, B., Shanks, T., Bielby, R., Metcalfe, N., Infante, L., Murphy, D., …Stach, S. (2022). The nature of sub-millimetre galaxies II: an ALMA comparison of SMG dust heating mechanisms. Monthly Notices of the Royal Astronomical Society, 510(4), 4976-4991. https://doi.org/10.1093/mnras/stac002

We compare the contribution of active galactic nuclei (AGNs) and star formation towards dust heating in sub-mm galaxies (SMGs). We have used ALMA at 0.1-arcsec resolution to image a complete flux-limited sample of seven sub-mm sources previously show... Read More about The nature of sub-millimetre galaxies II: an ALMA comparison of SMG dust heating mechanisms.

The nature of sub-millimetre galaxies I: a comparison of AGN and star-forming galaxy SED fits (2021)
Journal Article
Shanks, T., Ansarinejad, B., Bielby, R., Heywood, I., Metcalfe, N., & Wang, L. (2021). The nature of sub-millimetre galaxies I: a comparison of AGN and star-forming galaxy SED fits. Monthly Notices of the Royal Astronomical Society, 505(1), 1509-1529. https://doi.org/10.1093/mnras/stab1226

High-redshift sub-millimetre galaxies (SMGs) are usually assumed to be powered by star formation. However, it has been clear for some time that >20 per cent of such sourcesbrighter than ≈3 mJy host quasars. Here, we analyse a complete sample of 12 su... Read More about The nature of sub-millimetre galaxies I: a comparison of AGN and star-forming galaxy SED fits.

SuperRAENN: A Semisupervised Supernova Photometric Classification Pipeline Trained on Pan-STARRS1 Medium-Deep Survey Supernovae (2020)
Journal Article
Villar, V. A., Hosseinzadeh, G., Berger, E., Ntampaka, M., Jones, D. O., Challis, P., …Waters, C. (2020). SuperRAENN: A Semisupervised Supernova Photometric Classification Pipeline Trained on Pan-STARRS1 Medium-Deep Survey Supernovae. Astrophysical Journal, 905(2), Article 94. https://doi.org/10.3847/1538-4357/abc6fd

Automated classification of supernovae (SNe) based on optical photometric light-curve information is essential in the upcoming era of wide-field time domain surveys, such as the Legacy Survey of Space and Time (LSST) conducted by the Rubin Observator... Read More about SuperRAENN: A Semisupervised Supernova Photometric Classification Pipeline Trained on Pan-STARRS1 Medium-Deep Survey Supernovae.

Photometric Classification of 2315 Pan-STARRS1 Supernovae with Superphot (2020)
Journal Article
Hosseinzadeh, G., Dauphin, F., Villar, V. A., Berger, E., Jones, D. O., Challis, P., …Waters, C. (2020). Photometric Classification of 2315 Pan-STARRS1 Supernovae with Superphot. Astrophysical Journal, 905(2), Article 93. https://doi.org/10.3847/1538-4357/abc42b

The classification of supernovae (SNe) and its impact on our understanding of explosion physics and progenitors have traditionally been based on the presence or absence of certain spectral features. However, current and upcoming wide-field time-domai... Read More about Photometric Classification of 2315 Pan-STARRS1 Supernovae with Superphot.

Pan-STARRS Pixel Analysis: Source Detection and Characterization (2020)
Journal Article
Magnier, E. A., Sweeney, W., Chambers, K., Flewelling, H., Huber, M., Price, P., …Wainscoat, R. (2020). Pan-STARRS Pixel Analysis: Source Detection and Characterization. Astrophysical Journal Supplement, 251(1), Article 5. https://doi.org/10.3847/1538-4365/abb82c

Over 3 billion astronomical sources have been detected in the more than 22 million orthogonal transfer CCD images obtained as part of the Pan-STARRS1 3π survey. Over 85 billion instances of those sources have been automatically detected and character... Read More about Pan-STARRS Pixel Analysis: Source Detection and Characterization.

The Pan-STARRS1 Database and Data Products (2020)
Journal Article
Flewelling, H., Magnier, E., Chambers, K., Heasley, J., Holmberg, C., Huber, M., …Shiao, B. (2020). The Pan-STARRS1 Database and Data Products. Astrophysical Journal Supplement, 251(1), Article 7. https://doi.org/10.3847/1538-4365/abb82d

This paper describes the organization of the database and the catalog data products from the Pan-STARRS1 3π Steradian Survey. The catalog data products are available in the form of an SQL-based relational database from MAST, the Mikulski Archive for... Read More about The Pan-STARRS1 Database and Data Products.

The Pan-STARRS Data-processing System (2020)
Journal Article
Magnier, E. A., Chambers, K., Flewelling, H., Hoblitt, J., Huber, M., Price, P., …Wainscoat, R. (2020). The Pan-STARRS Data-processing System. Astrophysical Journal Supplement, 251(1), Article 3. https://doi.org/10.3847/1538-4365/abb829

The Pan-STARRS data-processing system is responsible for the steps needed to downloaded, archive, and process all images obtained by the Pan-STARRS telescopes, including real-time detection of transient sources such as supernovae and moving objects i... Read More about The Pan-STARRS Data-processing System.

Pan-STARRS Photometric and Astrometric Calibration (2020)
Journal Article
Magnier, E. A., Schlafly, E. F., Finkbeiner, D. P., Tonry, J., Goldman, B., Röser, S., …Wainscoat, R. (2020). Pan-STARRS Photometric and Astrometric Calibration. Astrophysical Journal Supplement, 251(1), Article 6. https://doi.org/10.3847/1538-4365/abb82a

We present the details of the photometric and astrometric calibration of the Pan-STARRS1 3π Survey. The photometric goals were to reduce the systematic effects introduced by the camera and detectors, and to place all of the observations onto a photom... Read More about Pan-STARRS Photometric and Astrometric Calibration.

Pan-STARRS Pixel Processing: Detrending, Warping, Stacking (2020)
Journal Article
Waters, C., Magnier, E., Price, P., Chambers, K., Burgett, W., Draper, P., …Wood-Vasey, W. (2020). Pan-STARRS Pixel Processing: Detrending, Warping, Stacking. Astrophysical Journal Supplement, 251(1), Article 4. https://doi.org/10.3847/1538-4365/abb82b

The Pan-STARRS1 (PS1) Science Consortium has carried out a set of imaging surveys using the 1.4 gigapixel GPC1 camera on the PS1 telescope. As this camera is composed of many individual electronic readouts and covers a very large field of view, great... Read More about Pan-STARRS Pixel Processing: Detrending, Warping, Stacking.

Cross-correlating Planck with VST ATLAS LRGs: a new test for the ISW effect in the Southern Hemisphere (2020)
Journal Article
Ansarinejad, B., Mackenzie, R., shanks, T., & Metcalfe, N. (2020). Cross-correlating Planck with VST ATLAS LRGs: a new test for the ISW effect in the Southern Hemisphere. Monthly Notices of the Royal Astronomical Society, 493(4), 4830-4844. https://doi.org/10.1093/mnras/staa592

The Integrated Sachs-Wolfe (ISW) effect probes the late-time expansion history of the universe, offering direct constraints on dark energy. Here we present our measurements of the ISW signal at redshifts of z¯=0.35⁠, 0.55 and 0.68, using the cross-co... Read More about Cross-correlating Planck with VST ATLAS LRGs: a new test for the ISW effect in the Southern Hemisphere.

Local Hole revisited: evidence for bulk motions and self-consistent outflow (2019)
Journal Article
Shanks, T., Hogarth, L., Metcalfe, N., & Whitbourn, J. (2019). Local Hole revisited: evidence for bulk motions and self-consistent outflow. Monthly Notices of the Royal Astronomical Society, 490(4), 4715-4720. https://doi.org/10.1093/mnras/stz2863

We revisit our mapping of the ‘Local Hole’, a large underdensity in the local galaxy redshift distribution that extends out to redshift, z ≈ 0.05 and a potential source of outflows that may perturb the global expansion rate and thus help mitigate the... Read More about Local Hole revisited: evidence for bulk motions and self-consistent outflow.

Supermassive Black Hole Binary Candidates from the Pan-STARRS1 Medium Deep Survey (2019)
Journal Article
Liu, T., Gezari, S., Ayers, M., Burgett, W., Chambers, K., Hodapp, K., …Waters, C. (2019). Supermassive Black Hole Binary Candidates from the Pan-STARRS1 Medium Deep Survey. Astrophysical Journal, 884(1), Article 36. https://doi.org/10.3847/1538-4357/ab40cb

We present a systematic search for periodically varying quasar and supermassive black hole binary (SMBHB) candidates in the Pan-STARRS1 Medium Deep Survey (MDS). From ~9000 color-selected quasars in an ~50 °2 sky area, we initially identify 26 candid... Read More about Supermassive Black Hole Binary Candidates from the Pan-STARRS1 Medium Deep Survey.

Changing-look Quasar Candidates: First Results from Follow-up Spectroscopy of Highly Optically Variable Quasars (2019)
Journal Article
MacLeod, C. L., Green, P. J., Anderson, S. F., Bruce, A., Eracleous, M., Graham, M., …Metcalfe, N. (2019). Changing-look Quasar Candidates: First Results from Follow-up Spectroscopy of Highly Optically Variable Quasars. Astrophysical Journal, 874(1), Article 8. https://doi.org/10.3847/1538-4357/ab05e2

Active galactic nuclei (AGNs) that show strong rest-frame optical/UV variability in their blue continuum and broad line emission are classified as changing-look AGN, or at higher luminosities, changing-look quasars (CLQs). These surprisingly large an... Read More about Changing-look Quasar Candidates: First Results from Follow-up Spectroscopy of Highly Optically Variable Quasars.

Precision Distances to Dwarf Galaxies and Globular Clusters from Pan-STARRS1 3π RR Lyrae (2019)
Journal Article
Hernitschek, N., Cohen, J. G., Rix, H., Magnier, E., Metcalfe, N., Wainscoat, R., …Burgett, W. (2019). Precision Distances to Dwarf Galaxies and Globular Clusters from Pan-STARRS1 3π RR Lyrae. Astrophysical Journal, 871(1), Article 49. https://doi.org/10.3847/1538-4357/aaf388

We present new spatial models and distance estimates for globular clusters and dwarf spheroidals orbiting our Galaxy based on RR Lyrae (RRab) stars in the Pan-STARRS1 (PS1) 3π survey. Using the PS1 sample of RRab stars from Sesar et al. in 16 globula... Read More about Precision Distances to Dwarf Galaxies and Globular Clusters from Pan-STARRS1 3π RR Lyrae.

Gaia Cepheid parallaxes and ‘Local Hole’ relieve H0 tension (2018)
Journal Article
Shanks, T., Hogarth, L., & Metcalfe, N. (2019). Gaia Cepheid parallaxes and ‘Local Hole’ relieve H0 tension. Monthly Notices of the Royal Astronomical Society: Letters, 484(1), L64-L68. https://doi.org/10.1093/mnrasl/sly239

There is an ≈9 ± 2.5 per cent tension between the value of Hubble’s Constant, H0 = 67.4 ± 0.5 km s−1 Mpc−1, implied by the Planck microwave background power spectrum and that given by the distance scale of H0 = 73.4 ± 1.7 km s−1Mpc−1. But with a plau... Read More about Gaia Cepheid parallaxes and ‘Local Hole’ relieve H0 tension.

Cepheids in M31: The PAndromeda Cepheid Sample (2018)
Journal Article
Kodric, M., Riffeser, A., Hopp, U., Goessl, C., Seitz, S., Bender, R., …Wainscoat, R. (2018). Cepheids in M31: The PAndromeda Cepheid Sample. Astronomical Journal, 156(3), Article 130. https://doi.org/10.3847/1538-3881/aad40f

We present the largest Cepheid sample in M31 based on the complete Pan-STARRS1 survey of Andromeda (PAndromeda) in the r P1, i P1, and g P1 bands. We find 2686 Cepheids with 1662 fundamental-mode Cepheids, 307 first-overtone Cepheids, 278 type II Cep... Read More about Cepheids in M31: The PAndromeda Cepheid Sample.

Galactic reddening in 3D from stellar photometry – an improved map (2018)
Journal Article
Green, G. M., Schlafly, E. F., Finkbeiner, D., Rix, H., Martin, N., Burgett, W., …Waters, C. (2018). Galactic reddening in 3D from stellar photometry – an improved map. Monthly Notices of the Royal Astronomical Society, 478(1), 651-666. https://doi.org/10.1093/mnras/sty1008

We present a new 3D map of interstellar dust reddening, covering three quarters of the sky (declinations of δ ≳ −30°) out to a distance of several kiloparsecs. The map is based on high-quality stellar photometry of 800 million stars from Pan-STARRS 1... Read More about Galactic reddening in 3D from stellar photometry – an improved map.

The Pan-STARRS1 Proper-motion Survey for Young Brown Dwarfs in Nearby Star-forming Regions. I. Taurus Discoveries and a Reddening-free Classification Method for Ultracool Dwarfs (2018)
Journal Article
Zhang, Z., Liu, M., Best, W., Magnier, E., Aller, K., Chambers, K., …Waters, C. (2018). The Pan-STARRS1 Proper-motion Survey for Young Brown Dwarfs in Nearby Star-forming Regions. I. Taurus Discoveries and a Reddening-free Classification Method for Ultracool Dwarfs. Astrophysical Journal, 858(1), Article 41. https://doi.org/10.3847/1538-4357/aab269

We are conducting a proper-motion survey for young brown dwarfs in the Taurus-Auriga molecular cloud based on the Pan-STARRS1 3π Survey. Our search uses multi-band photometry and astrometry to select candidates, and is wider (370 deg2) and deeper (do... Read More about The Pan-STARRS1 Proper-motion Survey for Young Brown Dwarfs in Nearby Star-forming Regions. I. Taurus Discoveries and a Reddening-free Classification Method for Ultracool Dwarfs.

Charge Diffusion Variations in Pan-STARRS1 CCDs (2018)
Journal Article
Magnier, E., Tonry, J., Finkbeiner, D., Schlafly, E., Burgett, W., Chambers, K., …Waters, C. (2018). Charge Diffusion Variations in Pan-STARRS1 CCDs. Publications of the Astronomical Society of the Pacific, 130(988), Article 065002. https://doi.org/10.1088/1538-3873/aaaad8

Thick back-illuminated deep-depletion CCDs have superior quantum efficiency over previous generations of thinned and traditional thick CCDs. As a result, they are being used for wide-field imaging cameras in several major projects. We use observation... Read More about Charge Diffusion Variations in Pan-STARRS1 CCDs.

Measuring Dark Energy Properties with Photometrically Classified Pan-STARRS Supernovae. II. Cosmological Parameters (2018)
Journal Article
Jones, D., Scolnic, D., Riess, A., Rest, A., Kirshner, R., Berger, E., …Smith, K. (2018). Measuring Dark Energy Properties with Photometrically Classified Pan-STARRS Supernovae. II. Cosmological Parameters. Astrophysical Journal, 857(1), Article 51. https://doi.org/10.3847/1538-4357/aab6b1

We use 1169 Pan-STARRS supernovae (SNe) and 195 low-z (z < 0.1) SNe Ia to measure cosmological parameters. Though most Pan-STARRS SNe lack spectroscopic classifications, in a previous paper we demonstrated that photometrically classified SNe can be u... Read More about Measuring Dark Energy Properties with Photometrically Classified Pan-STARRS Supernovae. II. Cosmological Parameters.

Two more, bright, z > 6 quasars from VST ATLAS and WISE (2018)
Journal Article
Chehade, B., Carnall, A., Shanks, T., Diener, C., Fumagalli, M., Findlay, J., …Gonzalez-Solares, E. (2018). Two more, bright, z > 6 quasars from VST ATLAS and WISE. Monthly Notices of the Royal Astronomical Society, 478(2), 1649-1659. https://doi.org/10.1093/mnras/sty690

Recently, Carnall et al. discovered two bright high redshift quasars using the combination of the VST ATLAS and WISE surveys. The technique involved using the 3-D colour plane i − z: z − W1: W1 − W2 with the WISE W1(3.4 micron) and W2 (4.5 micron) ba... Read More about Two more, bright, z > 6 quasars from VST ATLAS and WISE.

Color Variabilities of Spectrally Defined Red QSOs at z = 0.3–1.2 (2018)
Journal Article
Chen, I., Hwang, C., Kaiser, N., Magnier, E., Metcalfe, N., & Waters, C. (2018). Color Variabilities of Spectrally Defined Red QSOs at z = 0.3–1.2. Theory and Decision, 855(1), Article 66. https://doi.org/10.3847/1538-4357/aaab5b

We study the brightness and the color variabilities of 34 red and 122 typical quasi-stellar objects (QSOs) at z = 0.3–1.2 using data from the Pan-STARRS Medium Deep Survey. The red and the typical QSOs are selected based on the ratios of the flux den... Read More about Color Variabilities of Spectrally Defined Red QSOs at z = 0.3–1.2.

A Color-locus Method for Mapping R V Using Ensembles of Stars (2018)
Journal Article
Lee, A., Green, G. M., Schlafly, E. F., Finkbeiner, D. P., Burgett, W., Chambers, K., …Waters, C. (2018). A Color-locus Method for Mapping R V Using Ensembles of Stars. Astrophysical Journal, 854(2), Article 79. https://doi.org/10.3847/1538-4357/aaaa6d

We present a simple but effective technique for measuring angular variation in R V across the sky. We divide stars from the Pan-STARRS1 catalog into Healpix pixels and determine the posterior distribution of reddening and R V for each pixel using two... Read More about A Color-locus Method for Mapping R V Using Ensembles of Stars.

Hydrogen-poor Superluminous Supernovae from the Pan-STARRS1 Medium Deep Survey (2018)
Journal Article
Lunnan, R., Chornock, R., Berger, E., Jones, D., Rest, A., Czekala, I., …Willman, M. (2018). Hydrogen-poor Superluminous Supernovae from the Pan-STARRS1 Medium Deep Survey. Astrophysical Journal, 852(2), Article 81. https://doi.org/10.3847/1538-4357/aa9f1a

We present light curves and classification spectra of 17 hydrogen-poor superluminous supernovae (SLSNe) from the Pan-STARRS1 Medium Deep Survey (PS1 MDS). Our sample contains all objects from the PS1 MDS sample with spectroscopic classification that... Read More about Hydrogen-poor Superluminous Supernovae from the Pan-STARRS1 Medium Deep Survey.

Photometry and Proper Motions of M, L, and T Dwarfs from the Pan-STARRS1 3π Survey (2017)
Journal Article
Best, W., Magnier, E., Liu, M., Aller, K., Zhang, Z., Burgett, W., …Waters, C. (2018). Photometry and Proper Motions of M, L, and T Dwarfs from the Pan-STARRS1 3π Survey. Astrophysical Journal Supplement, 234(1), Article 1. https://doi.org/10.3847/1538-4365/aa9982

We present a catalog of 9888 M, L and T dwarfs detected in the Pan-STARRS1 3π Survey (PS1), covering three-quarters of the sky. Our catalog contains nearly all known objects of spectral types L0–T2 in the PS1 field, with objects as early as M0 and as... Read More about Photometry and Proper Motions of M, L, and T Dwarfs from the Pan-STARRS1 3π Survey.

The Time-domain Spectroscopic Survey: Target Selection for Repeat Spectroscopy (2017)
Journal Article
MacLeod, C., Green, P., Anderson, S., Eracleous, M., Ruan, J., Runnoe, J., …Waters, C. (2017). The Time-domain Spectroscopic Survey: Target Selection for Repeat Spectroscopy. Astronomical Journal, 155(1), Article 6. https://doi.org/10.3847/1538-3881/aa99da

As astronomers increasingly exploit the information available in the time domain, spectroscopic variability in particular opens broad new channels of investigation. Here we describe the selection algorithms for all targets intended for repeat spectro... Read More about The Time-domain Spectroscopic Survey: Target Selection for Repeat Spectroscopy.

The Geometry of the Sagittarius Stream from Pan-STARRS1 3π RR Lyrae (2017)
Journal Article
Hernitschek, N., Sesar, B., Rix, H., Belokurov, V., Martinez-Delgado, D., Martin, N. F., …Draper, P. W. (2017). The Geometry of the Sagittarius Stream from Pan-STARRS1 3π RR Lyrae. Astrophysical Journal, 850(1), Article 96. https://doi.org/10.3847/1538-4357/aa960c

We present a comprehensive and precise description of the Sagittarius (Sgr) stellar stream's 3D geometry as traced by its old stellar population. This analysis draws on the sample of ∼44,000 RR Lyrae (RRab) stars from the Pan-STARRS1 (PS1) 3π survey... Read More about The Geometry of the Sagittarius Stream from Pan-STARRS1 3π RR Lyrae.

Physical Properties of 15 Quasars at z ≳ 6.5 (2017)
Journal Article
Mazzucchelli, C., Bañados, E., Venemans, B., Decarli, R., Farina, E., Walter, F., …Wainscoat, R. (2017). Physical Properties of 15 Quasars at z ≳ 6.5. Astrophysical Journal, 849(2), Article 91. https://doi.org/10.3847/1538-4357/aa9185

Quasars are galaxies hosting accreting supermassive black holes; due to their brightness, they are unique probes of the early universe. To date, only few quasars have been reported at z>6.5 (

The Pan-STARRS1 Medium-deep Survey: Star Formation Quenching in Group and Cluster Environments (2017)
Journal Article
Jian, H., Lin, L., Lin, K., Foucaud, S., Chen, C., Chiueh, T., …Waters, C. (2017). The Pan-STARRS1 Medium-deep Survey: Star Formation Quenching in Group and Cluster Environments. Astrophysical Journal, 845(1), Article 74. https://doi.org/10.3847/1538-4357/aa7de2

We make use of a catalog of 1600 Pan-STARRS1 groups produced by the probability friends-of-friends algorithm to explore how the galaxy properties, i.e., the specific star formation rate (SSFR) and quiescent fraction, depend on stellar mass and group-... Read More about The Pan-STARRS1 Medium-deep Survey: Star Formation Quenching in Group and Cluster Environments.

Measuring the Properties of Dark Energy with Photometrically Classified Pan-STARRS Supernovae. I. Systematic Uncertainty from Core-collapse Supernova Contamination (2017)
Journal Article
Jones, D., Scolnic, D., Riess, A., Kessler, R., Rest, A., Kirshner, R., …Waters, C. (2017). Measuring the Properties of Dark Energy with Photometrically Classified Pan-STARRS Supernovae. I. Systematic Uncertainty from Core-collapse Supernova Contamination. Astrophysical Journal, 843(1), Article 6. https://doi.org/10.3847/1538-4357/aa767b

The Pan-STARRS (PS1) Medium Deep Survey discovered over 5000 likely supernovae (SNe) but obtained spectral classifications for just 10% of its SN candidates. We measured spectroscopic host galaxy redshifts for 3147 of these likely SNe and estimate th... Read More about Measuring the Properties of Dark Energy with Photometrically Classified Pan-STARRS Supernovae. I. Systematic Uncertainty from Core-collapse Supernova Contamination.

First Lensed Quasar Systems from the VST-ATLAS Survey: One Quad, Two Doubles, and Two Pairs of Lensless Twins (2017)
Journal Article
Schechter, P., Morgan, N., Chehade, B., Metcalfe, N., Shanks, T., & McDonald, M. (2017). First Lensed Quasar Systems from the VST-ATLAS Survey: One Quad, Two Doubles, and Two Pairs of Lensless Twins. Astronomical Journal, 153(5), Article 219. https://doi.org/10.3847/1538-3881/aa6899

We have analyzed images from the VST-ATLAS survey to identify candidate gravitationally lensed quasar systems in a sample of WISE sources with $W1-W2\gt 0.7$. Results from follow-up spectroscopy with the Baade 6.5 m telescope are presented for eight... Read More about First Lensed Quasar Systems from the VST-ATLAS Survey: One Quad, Two Doubles, and Two Pairs of Lensless Twins.

Machine-learned Identification of RR Lyrae Stars from Sparse, Multi-band Data: The PS1 Sample (2017)
Journal Article
Sesar, B., Hernitschek, N., Mitrović, S., Ivezić, Ž., Rix, H., Cohen, J., …Waters, C. (2017). Machine-learned Identification of RR Lyrae Stars from Sparse, Multi-band Data: The PS1 Sample. Astronomical Journal, 153(5), Article 204. https://doi.org/10.3847/1538-3881/aa661b

RR Lyrae stars may be the best practical tracers of Galactic halo (sub-)structure and kinematics. The PanSTARRS1 (PS1) $3\pi $ survey offers multi-band, multi-epoch, precise photometry across much of the sky, but a robust identification of RR Lyrae s... Read More about Machine-learned Identification of RR Lyrae Stars from Sparse, Multi-band Data: The PS1 Sample.

A catalogue of white dwarf candidates in VST ATLAS (2017)
Journal Article
Gentile Fusillo, N., Raddi, R., Gänsicke, B., Hermes, J., Pala, A., Fuchs, J., …Shanks, T. (2017). A catalogue of white dwarf candidates in VST ATLAS. Monthly Notices of the Royal Astronomical Society, 469(1), 621-629. https://doi.org/10.1093/mnras/stx777

The Sloan Digital Sky Survey (SDSS) has created a knowledge gap between the Northern and the Southern hemispheres, which is very marked for white dwarfs: Only ≃15 per cent of the known white dwarfs are south of the equator. Here, we make use of the V... Read More about A catalogue of white dwarf candidates in VST ATLAS.

Investigating merging galaxies by using Pan-STARRS images (2017)
Journal Article
Lin, Y., Yu, P., Huang, J., Hwang, C., Chen, W., Kaiser, N., …Waters, C. (2017). Investigating merging galaxies by using Pan-STARRS images. Astronomy & Astrophysics, 600, Article A28. https://doi.org/10.1051/0004-6361/201628600

Aims. We studied the r′-, z′-, and y′-band images of merging galaxies from the observations of the Panoramic Survey Telescope & Rapid Response System (Pan-STARRS). The merging galaxies were selected from our merging catalog that was created by checki... Read More about Investigating merging galaxies by using Pan-STARRS images.

An updated Type II supernova Hubble diagram (2017)
Journal Article
Gall, E., Kotak, R., Leibundgut, B., Taubenberger, S., Hillebrandt, W., Kromer, M., …Waters, C. (2017). An updated Type II supernova Hubble diagram. Astronomy & Astrophysics, 611, Article A25. https://doi.org/10.1051/0004-6361/201731271

We present photometry and spectroscopy of nine Type II-P/L supernovae (SNe) with redshifts in the 0.045 ≲ z ≲ 0.335 range, with a view to re-examining their utility as distance indicators. Specifically, we apply the expanding photosphere method (EPM)... Read More about An updated Type II supernova Hubble diagram.

The SAMI Galaxy Survey: the cluster redshift survey, target selection and cluster properties (2017)
Journal Article
Owers, M., Allen, J., Baldry, I., Bryant, J., Cecil, G., Cortese, L., …Tonini, C. (2017). The SAMI Galaxy Survey: the cluster redshift survey, target selection and cluster properties. Monthly Notices of the Royal Astronomical Society, 468(2), 1824-1849. https://doi.org/10.1093/mnras/stx562

We describe the selection of galaxies targeted in eight low-redshift clusters (APMCC0917, A168, A4038, EDCC442, A3880, A2399, A119 and A85; 0.029 < z < 0.058) as part of the Sydney-AAO Multi-Object Integral field spectrograph Galaxy Survey (SAMI-GS).... Read More about The SAMI Galaxy Survey: the cluster redshift survey, target selection and cluster properties.

A Search for L/T Transition Dwarfs with Pan-STARRS1 and WISE. III. Young L Dwarf Discoveries and Proper Motion Catalogs in Taurus and Scorpius–Centaurus (2017)
Journal Article
Best, W., Liu, M., Magnier, E., Bowler, B., Aller, K., Zhang, Z., …Waters, C. (2017). A Search for L/T Transition Dwarfs with Pan-STARRS1 and WISE. III. Young L Dwarf Discoveries and Proper Motion Catalogs in Taurus and Scorpius–Centaurus. Astrophysical Journal, 837(1), Article 95. https://doi.org/10.3847/1538-4357/aa5df0

We present the discovery of eight young M7–L2 dwarfs in the Taurus star-forming region and the Scorpius–Centaurus OB Association, serendipitously found during a wide-field search for L/T transition dwarfs using Pan-STARRS1 (optical) and WISE (mid-inf... Read More about A Search for L/T Transition Dwarfs with Pan-STARRS1 and WISE. III. Young L Dwarf Discoveries and Proper Motion Catalogs in Taurus and Scorpius–Centaurus.

Detection of Time Lags between Quasar Continuum Emission Bands Based On Pan-STARRS Light Curves (2017)
Journal Article
Jiang, Y., Green, P., Greene, J., Morganson, E., Shen, Y., Pancoast, A., …Waters, C. (2017). Detection of Time Lags between Quasar Continuum Emission Bands Based On Pan-STARRS Light Curves. Astrophysical Journal, 836(2), Article 186. https://doi.org/10.3847/1538-4357/aa5b91

As photons from different bands emerge from different radial ranges in the accretion disk, the lags constrain the sizes of the accretion disks. We select 240 quasars with redshifts of z ≈ 1 or z ≈ 0.3 that are relatively emission-line free. The light... Read More about Detection of Time Lags between Quasar Continuum Emission Bands Based On Pan-STARRS Light Curves.

Identification of partially resolved binaries in Pan-STARRS 1 data (2017)
Journal Article
Deacon, N., Magnier, E., Best, W., Liu, M., Dupuy, T., Chambers, K., …Waters, C. (2017). Identification of partially resolved binaries in Pan-STARRS 1 data. Monthly Notices of the Royal Astronomical Society, 468(3), 3499-3515. https://doi.org/10.1093/mnras/stx440

Using shape measurement techniques developed for weak lensing surveys, we have identified three new ultracool binaries in the Pan-STARRS 1 (Chambers et al.) survey. Binary companions that are not completely resolved can still alter the shapes of stel... Read More about Identification of partially resolved binaries in Pan-STARRS 1 data.

2MASS 0213+3648 C: A wide T3 benchmark companion to an an active, old M dwarf binary (2017)
Journal Article
Deacon, N., Magnier, E., Liu, M., Schlieder, J., Aller, K., Best, W., …Waters, C. (2017). 2MASS 0213+3648 C: A wide T3 benchmark companion to an an active, old M dwarf binary. Monthly Notices of the Royal Astronomical Society, 467(1), 1126-1139. https://doi.org/10.1093/mnras/stx065

We present the discovery of a 360 au separation T3 companion to the tight (3.1 au) M4.5+M6.5 binary 2MASS J02132062+3648506. This companion was identified using Pan-STARRS 1 data and despite its relative proximity to the Sun (22.2 +6.4−4.0 −4.0+6.4 p... Read More about 2MASS 0213+3648 C: A wide T3 benchmark companion to an an active, old M dwarf binary.

A Systematic Search for Periodically Varying Quasars in Pan-STARRS1: An Extended Baseline Test in Medium Deep Survey Field MD09 (2016)
Journal Article
Liu, T., Gezari, S., Burgett, W., Chambers, K., Draper, P., Hodapp, K., …Waters, C. (2016). A Systematic Search for Periodically Varying Quasars in Pan-STARRS1: An Extended Baseline Test in Medium Deep Survey Field MD09. Astrophysical Journal, 833(1), Article 6. https://doi.org/10.3847/0004-637x/833/1/6

We present a systematic search for periodically varying quasars and supermassive black hole binary (SMBHB) candidates in the Pan-STARRS1 (PS1) Medium Deep Survey's MD09 field. From a color-selected sample of 670 quasars extracted from a multi-band de... Read More about A Systematic Search for Periodically Varying Quasars in Pan-STARRS1: An Extended Baseline Test in Medium Deep Survey Field MD09.

Hiding in plain sight – recovering clusters of galaxies with the strongest AGN in their cores (2016)
Journal Article
Green, T., Edge, A., Ebeling, H., Burgett, W., Draper, P., Kaiser, N., …Waters, C. (2017). Hiding in plain sight – recovering clusters of galaxies with the strongest AGN in their cores. Monthly Notices of the Royal Astronomical Society, 465(4), 4872-4885. https://doi.org/10.1093/mnras/stw3059

A key challenge in understanding the feedback mechanism of active galactic nucleus (AGN) in Brightest Cluster Galaxies (BCGs) is the inherent rarity of catching an AGN during its strong outburst phase. This is exacerbated by the ambiguity of differen... Read More about Hiding in plain sight – recovering clusters of galaxies with the strongest AGN in their cores.

The Pan-STARRS1 Distant z > 5.6 Quasar Survey: More than 100 Quasars within the First Gyr of the Universe (2016)
Journal Article
Bañados, E., Venemans, B., Decarli, R., Farina, E., Mazzucchelli, C., Walter, F., …Yang, Q. (2016). The Pan-STARRS1 Distant z > 5.6 Quasar Survey: More than 100 Quasars within the First Gyr of the Universe. Astrophysical Journal Supplement, 227(1), Article 11. https://doi.org/10.3847/0067-0049/227/1/11

Luminous quasars at $z\gt 5.6$ can be studied in detail with the current generation of telescopes and provide us with unique information on the first gigayear of the universe. Thus far, these studies have been statistically limited by the number of q... Read More about The Pan-STARRS1 Distant z > 5.6 Quasar Survey: More than 100 Quasars within the First Gyr of the Universe.

PS1-14bj: A Hydrogen-poor Superluminous Supernova With a Long Rise and Slow Decay (2016)
Journal Article
Lunnan, R., Chornock, R., Berger, E., Milisavljevic, D., Jones, D., Rest, A., …Waters, C. (2016). PS1-14bj: A Hydrogen-poor Superluminous Supernova With a Long Rise and Slow Decay. Astrophysical Journal, 831(2), Article 144. https://doi.org/10.3847/0004-637x/831/2/144

We present photometry and spectroscopy of PS1-14bj, a hydrogen-poor superluminous supernova (SLSN) at redshift z = 0.5215 discovered in the last months of the Pan-STARRS1 Medium Deep Survey. PS1-14bj stands out because of its extremely slow evolution... Read More about PS1-14bj: A Hydrogen-poor Superluminous Supernova With a Long Rise and Slow Decay.

A Synoptic Map of Halo Substructures from the Pan-STARRS1 3π Survey (2016)
Journal Article
Bernard, E., Ferguson, A., Schlafly, E., Martin, N., Rix, H., Bell, E., …Waters, C. (2016). A Synoptic Map of Halo Substructures from the Pan-STARRS1 3π Survey. Monthly Notices of the Royal Astronomical Society, 463(2), 1759-1768. https://doi.org/10.1093/mnras/stw2134

We present a panoramic map of the entire Milky Way halo north of δ∼−30∘δ∼−30∘ (∼30 000 deg2), constructed by applying the matched-filter technique to the Pan-STARRS1 3π Survey data set. Using single-epoch photometry reaching to g ∼22, we are sensitiv... Read More about A Synoptic Map of Halo Substructures from the Pan-STARRS1 3π Survey.

Slow-blue nuclear hypervariables in PanSTARRS-1 (2016)
Journal Article
Lawrence, A., Bruce, A., MacLeod, C., Gezari, S., Elvis, M., Ward, M., …Soderberg, A. (2016). Slow-blue nuclear hypervariables in PanSTARRS-1. Monthly Notices of the Royal Astronomical Society, 463(1), 296-331. https://doi.org/10.1093/mnras/stw1963

We discuss 76 large amplitude transients (Δm > 1.5) occurring in the nuclei of galaxies, nearly all with no previously known active galactic nucleus (AGN). They have been discovered as part of the Pan-STARRS1 (PS1) 3π survey, by comparison with Sloan... Read More about Slow-blue nuclear hypervariables in PanSTARRS-1.

Mapping the Monoceros Ring in 3D with Pan-STARRS1 (2016)
Journal Article
Morganson, E., Conn, B., Rix, H., Bell, E., Burgett, W., Chambers, K., …Waters, C. (2016). Mapping the Monoceros Ring in 3D with Pan-STARRS1. Astrophysical Journal, 825(2), Article 140. https://doi.org/10.3847/0004-637x/825/2/140

Using the Pan-STARRS1 survey, we derive limiting magnitude, spatial completeness, and density maps that we use to probe the three-dimensional structure and estimate the stellar mass of the so-called Monoceros Ring. The Monoceros Ring is an enormous a... Read More about Mapping the Monoceros Ring in 3D with Pan-STARRS1.

Hypercalibration: A Pan-STARRS1-based Recalibration of the Sloan Digital Sky Survey Photometry (2016)
Journal Article
Finkbeiner, D., Schlafly, E., Schlegel, D., Padmanabhan, N., Jurić, M., Burgett, W., …Tonry, J. (2016). Hypercalibration: A Pan-STARRS1-based Recalibration of the Sloan Digital Sky Survey Photometry. Astrophysical Journal, 822(2), Article 66. https://doi.org/10.3847/0004-637x/822/2/66

We present a recalibration of the Sloan Digital Sky Survey (SDSS) photometry with new flat fields and zero points derived from Pan-STARRS1. Using point-spread function (PSF) photometry of 60 million stars with 16 < r < 20, we derive a model of amplif... Read More about Hypercalibration: A Pan-STARRS1-based Recalibration of the Sloan Digital Sky Survey Photometry.

Of Genes and Machines: Application of a Combination of Machine Learning Tools to Astronomy Data Sets (2016)
Journal Article
Heinis, S., Kumar, S., Gezari, S., Burgett, W., Chambers, K., Draper, P., …Waters, C. (2016). Of Genes and Machines: Application of a Combination of Machine Learning Tools to Astronomy Data Sets. Astrophysical Journal, 821(2), Article 86. https://doi.org/10.3847/0004-637x/821/2/86

We apply a combination of genetic algorithm (GA) and support vector machine (SVM) machine learning algorithms to solve two important problems faced by the astronomical community: star–galaxy separation and photometric redshift estimation of galaxies... Read More about Of Genes and Machines: Application of a Combination of Machine Learning Tools to Astronomy Data Sets.

The Optical-infrared Extinction Curve and Its Variation in the Milky Way (2016)
Journal Article
Schlafly, E., Meisner, A., Stutz, A., Kainulainen, J., Peek, J., Tchernyshyov, K., …Waters, C. (2016). The Optical-infrared Extinction Curve and Its Variation in the Milky Way. Astrophysical Journal, 821(2), Article 78. https://doi.org/10.3847/0004-637x/821/2/78

The dust extinction curve is a critical component of many observational programs and an important diagnostic of the physics of the interstellar medium. Here we present new measurements of the dust extinction curve and its variation toward tens of tho... Read More about The Optical-infrared Extinction Curve and Its Variation in the Milky Way.

The 2QDES Pilot : The luminosity and redshift dependence of quasar clustering (2016)
Journal Article
Chehade, B., Shanks, T., Findlay, J., Metcalfe, N., Sawangwit, U., Irwin, M., …Bielby, R. (2016). The 2QDES Pilot : The luminosity and redshift dependence of quasar clustering. Monthly Notices of the Royal Astronomical Society, 459(2), 1179-1200. https://doi.org/10.1093/mnras/stw616

We present a new redshift survey, the 2dF Quasar Dark Energy Survey pilot (2QDESp), which consists of ≈10 000 quasars from ≈150 deg2 of the southern sky, based on VST-ATLAS imaging and 2dF/AAOmega spectroscopy. Combining our optical photometry with t... Read More about The 2QDES Pilot : The luminosity and redshift dependence of quasar clustering.

Pan-Planets: Searching for hot Jupiters around cool dwarfs (2016)
Journal Article
Obermeier, C., Koppenhoefer, J., Saglia, R., Henning, T., Bender, R., Kodric, M., …Waters, C. (2016). Pan-Planets: Searching for hot Jupiters around cool dwarfs. Astronomy & Astrophysics, 587, Article A49. https://doi.org/10.1051/0004-6361/201527633

The Pan-Planets survey observed an area of 42 sq deg. in the galactic disk for about 165 h. The main scientific goal of the project is the detection of transiting planets around M dwarfs. We establish an efficient procedure for determining the stella... Read More about Pan-Planets: Searching for hot Jupiters around cool dwarfs.

Finding, Characterizing, and Classifying Variable Sources in Multi-epoch Sky Surveys: QSOs and RR Lyrae in PS1 3π data (2016)
Journal Article
Hernitschek, N., Schlafly, E., Sesar, B., Rix, H., Hogg, D., Ivezić, Ž., …Waters, C. (2016). Finding, Characterizing, and Classifying Variable Sources in Multi-epoch Sky Surveys: QSOs and RR Lyrae in PS1 3π data. Astrophysical Journal, 817(1), Article 73. https://doi.org/10.3847/0004-637x/817/1/73

In area and depth, the Pan-STARRS1 (PS1) 3π survey is unique among many-epoch, multi-band surveys and has enormous potential for the all-sky identification of variable sources. PS1 has observed the sky typically seven times in each of its five bands... Read More about Finding, Characterizing, and Classifying Variable Sources in Multi-epoch Sky Surveys: QSOs and RR Lyrae in PS1 3π data.

Supercal: Cross-calibration of Multiple Photometric Systems to Improve Cosmological Measurements with Type Ia Supernovae (2015)
Journal Article
Scolnic, D., Casertano, S., Riess, A., Rest, A., Schlafly, E., Foley, R., …Stubbs, C. (2015). Supercal: Cross-calibration of Multiple Photometric Systems to Improve Cosmological Measurements with Type Ia Supernovae. Astrophysical Journal, 815, https://doi.org/10.1088/0004-637x/815/2/117

Current cosmological analyses, which use Type Ia supernova observations, combine supernova (SN) samples to expand the redshift range beyond that of a single sample and increase the overall sample size. The inhomogeneous photometric calibration betwee... Read More about Supercal: Cross-calibration of Multiple Photometric Systems to Improve Cosmological Measurements with Type Ia Supernovae.

Pan-STARRS1 variability of XMM-COSMOS AGN. I. Impact on photometric redshifts (2015)
Journal Article
Simm, T., Saglia, R., Salvato, M., Bender, R., Burgett, W., Chambers, K., …Waters, C. (2015). Pan-STARRS1 variability of XMM-COSMOS AGN. I. Impact on photometric redshifts. Astronomy & Astrophysics, 584, Article A106. https://doi.org/10.1051/0004-6361/201526859

Aims. Upcoming large area sky surveys like Euclid and eROSITA, which are dedicated to studying the role of dark energy in the expansion history of the Universe and the three-dimensional mass distribution of matter, crucially depend on accurate photom... Read More about Pan-STARRS1 variability of XMM-COSMOS AGN. I. Impact on photometric redshifts.

Galaxy and mass assembly (GAMA): projected galaxy clustering (2015)
Journal Article
Farrow, D., Cole, S., Norberg, P., Metcalfe, N., Baldry, I., Bland-Hawthorn, J., …Sridhar, S. (2015). Galaxy and mass assembly (GAMA): projected galaxy clustering. Monthly Notices of the Royal Astronomical Society, 454(2), 2120-2145. https://doi.org/10.1093/mnras/stv2075

We measure the projected two-point correlation function of galaxies in the 180 deg2 equatorial regions of the GAMA II survey, for four different redshift slices between z = 0.0 and 0.5. To do this, we further develop the Cole method of producing suit... Read More about Galaxy and mass assembly (GAMA): projected galaxy clustering.

A Search for L/T Transition Dwarfs with Pan-STARRS1 and WISE. II. L/T Transition Atmospheres and Young Discoveries (2015)
Journal Article
Best, W., Liu, M., Magnier, E., Deacon, N., Aller, K., Redstone, J., …Waters, C. (2015). A Search for L/T Transition Dwarfs with Pan-STARRS1 and WISE. II. L/T Transition Atmospheres and Young Discoveries. Astrophysical Journal, 814(2), Article 118. https://doi.org/10.1088/0004-637x/814/2/118

The evolution of brown dwarfs from L to T spectral types is one of the least understood aspects of the ultracool population, partly for lack of a large, well-defined, and well-characterized sample in the L/T transition. To improve the existing census... Read More about A Search for L/T Transition Dwarfs with Pan-STARRS1 and WISE. II. L/T Transition Atmospheres and Young Discoveries.

Sagittarius II, Draco II and Laevens 3: Three New Milky Way Satellites Discovered in the Pan-STARRS 1 3 Survey (2015)
Journal Article
Laevens, B., Martin, N., Bernard, E., Schlafly, E., Sesar, B., H.-w., R., …Waters, C. (2015). Sagittarius II, Draco II and Laevens 3: Three New Milky Way Satellites Discovered in the Pan-STARRS 1 3 Survey. Astrophysical Journal, 813(1), Article 44. https://doi.org/10.1088/0004-637x/813/1/44

We present the discovery of three new Milky Way satellites from our search for compact stellar overdensities in the photometric catalog of the Panoramic Survey Telescope and Rapid Response System 1 (Pan-STARRS 1, or PS1) 3π survey. The first satellit... Read More about Sagittarius II, Draco II and Laevens 3: Three New Milky Way Satellites Discovered in the Pan-STARRS 1 3 Survey.

A Three-dimensional Map of Milky Way Dust (2015)
Journal Article
Green, G., Schlafly, E., Finkbeiner, D., Rix, H., Martin, N., Burgett, W., …Wainscoat, R. (2015). A Three-dimensional Map of Milky Way Dust. Astrophysical Journal, 810(1), Article 25. https://doi.org/10.1088/0004-637x/810/1/25

We present a three-dimensional map of interstellar dust reddening, covering three-quarters of the sky out to a distance of several kiloparsecs, based on Pan-STARRS 1 (PS1) and 2MASS photometry. The map reveals a wealth of detailed structure, from fil... Read More about A Three-dimensional Map of Milky Way Dust.

The shell game: a panoramic view of Fornax (2015)
Journal Article
Bate, N., McMonigal, B., Lewis, G., Irwin, M., Gonzalez-Solares, E., Shanks, T., & Metcalfe, N. (2015). The shell game: a panoramic view of Fornax. Monthly Notices of the Royal Astronomical Society, 453(1), 690-703. https://doi.org/10.1093/mnras/stv1684

We present a panoramic study of the Fornax dwarf spheroidal galaxy, using data obtained as part of the VLT Survey Telescope (VST) ATLAS Survey. The data presented here – a subset of the full survey – uniformly cover a region of 25 deg2 centred on the... Read More about The shell game: a panoramic view of Fornax.

The VLT Survey Telescope ATLAS (2015)
Journal Article
Shanks, T., Metcalfe, N., Chehade, B., Findlay, J., Irwin, M., Gonzalez-Solares, E., …Voutsinas, S. (2015). The VLT Survey Telescope ATLAS. Monthly Notices of the Royal Astronomical Society, 451(4), 4238-4252. https://doi.org/10.1093/mnras/stv1130

The VLT Survey Telescope ATLAS survey is an optical ugriz survey aiming to cover ≈4700 deg2 of the southern sky to similar depths as the Sloan Digital Sky Survey (SDSS). From reduced images and object catalogues provided by the Cambridge Astronomical... Read More about The VLT Survey Telescope ATLAS.

The Time Domain Spectroscopic Survey: Variable Selection and Anticipated Results (2015)
Journal Article
Morganson, E., Green, P., Anderson, S., Ruan, J., Myers, A., Eracleous, M., …Waters, C. (2015). The Time Domain Spectroscopic Survey: Variable Selection and Anticipated Results. Astrophysical Journal, 806(2), https://doi.org/10.1088/0004-637x/806/2/244

We present the selection algorithm and anticipated results for the Time Domain Spectroscopic Survey (TDSS). TDSS is an Sloan Digital Sky Survey (SDSS)-IV Extended Baryon Oscillation Spectroscopic Survey (eBOSS) subproject that will provide initial id... Read More about The Time Domain Spectroscopic Survey: Variable Selection and Anticipated Results.

Optical confirmation and redshift estimation of the Planck cluster candidates overlapping the Pan-STARRS Survey (2015)
Journal Article
Liu, J., Hennig, C., Desai, S., Hoyle, B., Koppenhoefer, J., Mohr, J., …Waters, C. (2015). Optical confirmation and redshift estimation of the Planck cluster candidates overlapping the Pan-STARRS Survey. Monthly Notices of the Royal Astronomical Society, 449(4), 3370-3380. https://doi.org/10.1093/mnras/stv458

We report results of a study of Planck Sunyaev–Zel'dovich effect selected galaxy cluster candidates using the Panoramic Survey Telescope & Rapid Response System (Pan-STARRS) imaging data. We first examine 150 Planck-confirmed galaxy clusters with spe... Read More about Optical confirmation and redshift estimation of the Planck cluster candidates overlapping the Pan-STARRS Survey.

Two bright z > 6 quasars from VST ATLAS and a new method of optical plus mid-infrared colour selection (2015)
Journal Article
Carnall, A., Shanks, T., Chehade, B., Fumagalli, M., Rauch, M., Irwin, M., …Metcalfe, N. (2015). Two bright z > 6 quasars from VST ATLAS and a new method of optical plus mid-infrared colour selection. Monthly Notices of the Royal Astronomical Society: Letters, 451(1), L16-L20. https://doi.org/10.1093/mnrasl/slv057

We present the discovery of two z > 6 quasars, selected as i-band dropouts in the Very Large Telescope Survey Telescope ATLAS survey. Our first quasar has redshift, z = 6.31 ± 0.03, z-band magnitude, zAB = 19.63 ± 0.08 and rest frame 1450 Å absolute... Read More about Two bright z > 6 quasars from VST ATLAS and a new method of optical plus mid-infrared colour selection.

Constraining the Radio-loud Fraction of Quasars at z > 5.5 (2015)
Journal Article
Bañados, E., Venemans, B., Morganson, E., Hodge, J., Decarli, R., Walter, F., …Wainscoat, R. (2015). Constraining the Radio-loud Fraction of Quasars at z > 5.5. Astrophysical Journal, 804(2), https://doi.org/10.1088/0004-637x/804/2/118

Radio-loud active galactic nuclei at $z\sim 2-4$ are typically located in dense environments and their host galaxies are among the most massive systems at those redshifts, providing key insights for galaxy evolution. Finding radio-loud quasars at the... Read More about Constraining the Radio-loud Fraction of Quasars at z > 5.5.

Machine learning for transient discovery in Pan-STARRS1 difference imaging (2015)
Journal Article
Wright, D., Smartt, S., Smith, K., Miller, P., Kotak, R., Rest, A., …Waters, C. (2015). Machine learning for transient discovery in Pan-STARRS1 difference imaging. Monthly Notices of the Royal Astronomical Society, 449(1), 451-466. https://doi.org/10.1093/mnras/stv292

Efficient identification and follow-up of astronomical transients is hindered by the need for humans to manually select promising candidates from data streams that contain many false positives. These artefacts arise in the difference images that are... Read More about Machine learning for transient discovery in Pan-STARRS1 difference imaging.

Detection of a supervoid aligned with the cold spot of the cosmic microwave background (2015)
Journal Article
Szapudi, I., Kovács, A., Granett, B., Frei, Z., Silk, J., Burgett, W., …Wainscoat, R. (2015). Detection of a supervoid aligned with the cold spot of the cosmic microwave background. Monthly Notices of the Royal Astronomical Society, 450(1), 288-294. https://doi.org/10.1093/mnras/stv488

We use the WISE-2MASS infrared galaxy catalogue matched with Pan-STARRS1 (PS1) galaxies to search for a supervoid in the direction of the cosmic microwave background (CMB) cold spot (CS). Our imaging catalogue has median redshift z ≃ 0.14, and we obt... Read More about Detection of a supervoid aligned with the cold spot of the cosmic microwave background.

Selecting superluminous supernovae in faint galaxies from the first year of the Pan-STARRS1 Medium Deep Survey (2015)
Journal Article
McCrum, M., Smartt, S., Rest, A., Smith, K., Kotak, R., Rodney, S., …Waters, C. (2015). Selecting superluminous supernovae in faint galaxies from the first year of the Pan-STARRS1 Medium Deep Survey. Monthly Notices of the Royal Astronomical Society, 448(2), 1206-1231. https://doi.org/10.1093/mnras/stv034

The Pan-STARRS1 (PS1) survey has obtained imaging in five bands (griz yP1) over 10 Medium Deep Survey (MDS) fields covering a total of 70 square degrees. This paper describes the search for apparently hostless supernovae (SNe) within the first year o... Read More about Selecting superluminous supernovae in faint galaxies from the first year of the Pan-STARRS1 Medium Deep Survey.

A New Faint Milky Way Satellite Discovered in the Pan-STARRS1 3π Survey (2015)
Journal Article
Laevens, B., Martin, N., Ibata, R., Rix, H., Bernard, E., Bell, E., …Waters, C. (2015). A New Faint Milky Way Satellite Discovered in the Pan-STARRS1 3π Survey. Astrophysical Journal Letters, 802(2), https://doi.org/10.1088/2041-8205/802/2/l18

We present the discovery of a faint Milky Way satellite, Laevens 2/Triangulum II, found in the Panoramic Survey Telescope And Rapid Response System (Pan-STARRS 1) 3 pi imaging data and confirmed with follow-up wide-field photometry from the Large Bin... Read More about A New Faint Milky Way Satellite Discovered in the Pan-STARRS1 3π Survey.

Selection of Burst-like Transients and Stochastic Variables Using Multi-band Image Differencing in the PAN-STARRS1 Medium-deep Survey (2015)
Journal Article
Kumar, S., Gezari, S., Heinis, S., Chornock, R., Berger, E., Rest, A., …Wainscoat, R. (2015). Selection of Burst-like Transients and Stochastic Variables Using Multi-band Image Differencing in the PAN-STARRS1 Medium-deep Survey. Astrophysical Journal, 802(1), Article 27. https://doi.org/10.1088/0004-637x/802/1/27

We present a novel method for the light-curve characterization of Pan-STARRS1 Medium Deep Survey (PS1 MDS) extragalactic sources into stochastic variables (SVs) and burst-like (BL) transients, using multi-band image-differencing time-series data. We... Read More about Selection of Burst-like Transients and Stochastic Variables Using Multi-band Image Differencing in the PAN-STARRS1 Medium-deep Survey.

The SAMI Galaxy Survey: instrument specification and target selection (2015)
Journal Article
Bryant, J., Owers, M., Robotham, A., Croom, S., Driver, S., Drinkwater, M., …Walcher, C. (2015). The SAMI Galaxy Survey: instrument specification and target selection. Monthly Notices of the Royal Astronomical Society, 447(3), 2857-2879. https://doi.org/10.1093/mnras/stu2635

The SAMI Galaxy Survey will observe 3400 galaxies with the Sydney-AAO Multi-object Integral-field spectrograph (SAMI) on the Anglo-Australian Telescope in a 3-yr survey which began in 2013. We present the throughput of the SAMI system, the science ba... Read More about The SAMI Galaxy Survey: instrument specification and target selection.

The Identification of Z-dropouts in Pan-STARRS1: Three Quasars at 6.5< z< 6.7 (2015)
Journal Article
Venemans, B., Bañados, E., Decarli, R., Farina, E., Walter, F., Chambers, K., …Sullivan, P. (2015). The Identification of Z-dropouts in Pan-STARRS1: Three Quasars at 6.5< z< 6.7. Astrophysical Journal Letters, 801(1), Article L11. https://doi.org/10.1088/2041-8205/801/1/l11

Luminous distant quasars are unique probes of the high-redshift intergalactic medium (IGM) and of the growth of massive galaxies and black holes in the early universe. Absorption due to neutral hydrogen in the IGM makes quasars beyond a redshift of $... Read More about The Identification of Z-dropouts in Pan-STARRS1: Three Quasars at 6.5< z< 6.7.

The Structure and Stellar Content of the Outer Disks of Galaxies: A New View from the Pan-STARRS1 Medium Deep Survey (2015)
Journal Article
Zheng, Z., Thilker, D., Heckman, T., Meurer, G., Burgett, W., Chambers, K., …Waters, C. (2015). The Structure and Stellar Content of the Outer Disks of Galaxies: A New View from the Pan-STARRS1 Medium Deep Survey. Astrophysical Journal, 800(2), https://doi.org/10.1088/0004-637x/800/2/120

We present the results of an analysis of Pan-STARRS1 Medium Deep Survey multi-band (grizy) images of a sample of 698 low-redshift disk galaxies that span broad ranges in stellar mass, star-formation rate, and bulge/disk ratio. We use population synth... Read More about The Structure and Stellar Content of the Outer Disks of Galaxies: A New View from the Pan-STARRS1 Medium Deep Survey.

Three-dimensional Dust Mapping Reveals that Orion Forms Part of a Large Ring of Dust (2015)
Journal Article
Schlafly, E., Green, G., Finkbeiner, D., Rix, H., Burgett, W., Chambers, K., …Waters, C. (2015). Three-dimensional Dust Mapping Reveals that Orion Forms Part of a Large Ring of Dust. Astrophysical Journal, 799(2), https://doi.org/10.1088/0004-637x/799/2/116

The Orion Molecular Complex is the nearest site of ongoing high-mass star formation, making it one of the most extensively studied molecular complexes in the Galaxy. We have developed a new technique for mapping the three-dimensional distribution of... Read More about Three-dimensional Dust Mapping Reveals that Orion Forms Part of a Large Ring of Dust.

Toward Characterization of the Type IIP Supernova Progenitor Population: A Statistical Sample of Light Curves from Pan-STARRS1 (2015)
Journal Article
Sanders, N., Soderberg, A., Gezari, S., Betancourt, M., Chornock, R., Berger, E., …Waters, C. (2015). Toward Characterization of the Type IIP Supernova Progenitor Population: A Statistical Sample of Light Curves from Pan-STARRS1. Astrophysical Journal, 799(2), https://doi.org/10.1088/0004-637x/799/2/208

In recent years, wide-field sky surveys providing deep multiband imaging have presented a new path for indirectly characterizing the progenitor populations of core-collapse supernovae (SNe): systematic light-curve studies. We assemble a set of 76 gri... Read More about Toward Characterization of the Type IIP Supernova Progenitor Population: A Statistical Sample of Light Curves from Pan-STARRS1.

Cosmological Constraints from Measurements of Type Ia Supernovae Discovered during the First 1.5 yr of the Pan-STARRS1 Survey (2014)
Journal Article
Rest, A., Scolnic, D., Foley, R., Huber, M., Chornock, R., Narayan, G., …Waters, C. (2014). Cosmological Constraints from Measurements of Type Ia Supernovae Discovered during the First 1.5 yr of the Pan-STARRS1 Survey. Astrophysical Journal, 795(1), https://doi.org/10.1088/0004-637x/795/1/44

We present griz P1 light curves of 146 spectroscopically confirmed Type Ia supernovae (SNe Ia; 0.03 < z < 0.65) discovered during the first 1.5 yr of the Pan-STARRS1 Medium Deep Survey. The Pan-STARRS1 natural photometric system is determined by a co... Read More about Cosmological Constraints from Measurements of Type Ia Supernovae Discovered during the First 1.5 yr of the Pan-STARRS1 Survey.

Systematic Uncertainties Associated with the Cosmological Analysis of the First Pan-STARRS1 Type Ia Supernova Sample (2014)
Journal Article
Scolnic, D., Rest, A., Riess, A., Huber, M., Foley, R., Brout, D., …Waters, C. (2014). Systematic Uncertainties Associated with the Cosmological Analysis of the First Pan-STARRS1 Type Ia Supernova Sample. Astrophysical Journal, 795(1), Article 45. https://doi.org/10.1088/0004-637x/795/1/45

We probe the systematic uncertainties from the 113 Type Ia supernovae (SN Ia) in the Pan-STARRS1 (PS1) sample along with 197 SN Ia from a combination of low-redshift surveys. The companion paper by Rest et al. describes the photometric measurements a... Read More about Systematic Uncertainties Associated with the Cosmological Analysis of the First Pan-STARRS1 Type Ia Supernova Sample.

Rapidly Evolving and Luminous Transients from Pan-STARRS1 (2014)
Journal Article
Drout, M., Chornock, R., Soderberg, A., Sanders, N., McKinnon, R., Rest, A., …Waters, C. (2014). Rapidly Evolving and Luminous Transients from Pan-STARRS1. Astrophysical Journal, 794(1), https://doi.org/10.1088/0004-637x/794/1/23

In the past decade, several rapidly evolving transients have been discovered whose timescales and luminosities are not easily explained by traditional supernovae (SNe) models. The sample size of these objects has remained small due, at least in part,... Read More about Rapidly Evolving and Luminous Transients from Pan-STARRS1.

Wide Cool and Ultracool Companions to Nearby Stars from Pan-STARRS 1 (2014)
Journal Article
Deacon, N., Liu, M., Magnier, E., Aller, K., Best, W., Dupuy, T., …Wainscoat, R. (2014). Wide Cool and Ultracool Companions to Nearby Stars from Pan-STARRS 1. Astrophysical Journal, 792(2), https://doi.org/10.1088/0004-637x/792/2/119

We present the discovery of 57 wide (>5'') separation, low-mass (stellar and substellar) companions to stars in the solar neighborhood identified from Pan-STARRS 1 (PS1) data and the spectral classification of 31 previously known companions. Our comp... Read More about Wide Cool and Ultracool Companions to Nearby Stars from Pan-STARRS 1.

Serendipitous discovery of a thin stellar stream near the Galactic bulge in the Pan-STARRS1 3π Survey (2014)
Journal Article
Bernard, E., Ferguson, A., Schlafly, E., Abbas, M., Bell, E., Deacon, N., …Waters, C. (2014). Serendipitous discovery of a thin stellar stream near the Galactic bulge in the Pan-STARRS1 3π Survey. Monthly Notices of the Royal Astronomical Society: Letters, 443(1), L84-L88. https://doi.org/10.1093/mnrasl/slu089

We report the discovery of a thin stellar stream found in Pan-STARRS1 photometry near the Galactic bulge in the constellation of Ophiuchus. It appears as a coherent structure in the colour-selected stellar density maps produced to search for tidal de... Read More about Serendipitous discovery of a thin stellar stream near the Galactic bulge in the Pan-STARRS1 3π Survey.

Galactic globular and open cluster fiducial sequences in the Pan-STARRS1 photometric system (2014)
Journal Article
Bernard, E., Ferguson, A., Schlafly, E., Platais, I., Bell, E., Martin, N., …Waters, C. (2014). Galactic globular and open cluster fiducial sequences in the Pan-STARRS1 photometric system. Monthly Notices of the Royal Astronomical Society, 442(4), 2999-3009. https://doi.org/10.1093/mnras/stu1081

We present the fiducial sequences of a sample of Galactic star clusters in the five bands of the Pan-STARRS1 (PS1) photometric system (gP1, rP1, iP1, zP1, and yP1). These empirical sequences – which include the red giant and sub-giant branches, the m... Read More about Galactic globular and open cluster fiducial sequences in the Pan-STARRS1 photometric system.

The Complex Structure of Stars in the Outer Galactic Disk as Revealed by Pan-STARRS1 (2014)
Journal Article
Slater, C., Bell, E., Schlafly, E., Morganson, E., Martin, N., Rix, H., …Waters, C. (2014). The Complex Structure of Stars in the Outer Galactic Disk as Revealed by Pan-STARRS1. Astrophysical Journal, 791(1), https://doi.org/10.1088/0004-637x/791/1/9

We present a panoptic view of the stellar structure in the Galactic disk's outer reaches commonly known as the Monoceros Ring, based on data from Pan-STARRS1. These observations clearly show the large extent of the stellar overdensities on both sides... Read More about The Complex Structure of Stars in the Outer Galactic Disk as Revealed by Pan-STARRS1.

Discovery of a cold stellar stream in the ATLAS DR1 data (2014)
Journal Article
Koposov, S., Irwin, M., Belokurov, V., Gonzales-Solares, E., Kupcu Yoldas, A., Lewis, J., …Shanks, T. (2014). Discovery of a cold stellar stream in the ATLAS DR1 data. Monthly Notices of the Royal Astronomical Society: Letters, 442(1), L85-L89. https://doi.org/10.1093/mnrasl/slu060

We report the discovery of a narrow stellar stream crossing the constellations of Sculptor and Fornax in the Southern celestial hemisphere. The portion of the stream detected in the Data Release 1 photometry of the ATLAS survey is at least 12° long,... Read More about Discovery of a cold stellar stream in the ATLAS DR1 data.

A Map of Dust Reddening to 4.5 kpc from Pan-STARRS1 (2014)
Journal Article
Schlafly, E., Green, G., Finkbeiner, D., Jurić, M., Rix, H., Martin, N., …Waters, C. (2014). A Map of Dust Reddening to 4.5 kpc from Pan-STARRS1. Astrophysical Journal, 789(1), Article 15. https://doi.org/10.1088/0004-637x/789/1/15

We present a map of the dust reddening to 4.5 kpc derived from Pan-STARRS1 stellar photometry. The map covers almost the entire sky north of declination –30° at a resolution of 7'-14', and is based on the estimated distances and reddenings to more th... Read More about A Map of Dust Reddening to 4.5 kpc from Pan-STARRS1.

Discovery of Eight z ~ 6 Quasars from Pan-STARRS1 (2014)
Journal Article
Bañados, E., Venemans, B., Morganson, E., Decarli, R., Walter, F., Chambers, K., …Waters, C. (2014). Discovery of Eight z ~ 6 Quasars from Pan-STARRS1. Astronomical Journal, 148(1), Article 14. https://doi.org/10.1088/0004-6256/148/1/14

High-redshift quasars are currently the only probes of the growth of supermassive black holes and potential tracers of structure evolution at early cosmic time. Here we present our candidate selection criteria from the Panoramic Survey Telescope & Ra... Read More about Discovery of Eight z ~ 6 Quasars from Pan-STARRS1.

ATLAS lifts the Cup: discovery of a new Milky Way satellite in Crater (2014)
Journal Article
Belokurov, V., Irwin, M., Koposov, S., Evans, N., Gonzalez-Solares, E., Metcalfe, N., & Shanks, T. (2014). ATLAS lifts the Cup: discovery of a new Milky Way satellite in Crater. Monthly Notices of the Royal Astronomical Society, 441(3), 2124-2133. https://doi.org/10.1093/mnras/stu626

We announce the discovery of a new Galactic companion found in data from the ESO VST ATLAS survey, and followed up with deep imaging on the 4-m William Herschel Telescope. The satellite is located in the constellation of Crater (the Cup) at a distanc... Read More about ATLAS lifts the Cup: discovery of a new Milky Way satellite in Crater.

A Large Catalog of Accurate Distances to Molecular Clouds from PS1 Photometry (2014)
Journal Article
Schlafly, E., Green, G., Finkbeiner, D., Rix, H., Bell, E., Burgett, W., …Tonry, J. (2014). A Large Catalog of Accurate Distances to Molecular Clouds from PS1 Photometry. Astrophysical Journal, 786(1), Article 29. https://doi.org/10.1088/0004-637x/786/1/29

Distance measurements to molecular clouds are important but are often made separately for each cloud of interest, employing very different data and techniques. We present a large, homogeneous catalog of distances to molecular clouds, most of which ar... Read More about A Large Catalog of Accurate Distances to Molecular Clouds from PS1 Photometry.

A New Distant Milky Way Globular Cluster in the Pan-STARRS1 3π Survey (2014)
Journal Article
Laevens, B., Martin, N., Sesar, B., Bernard, E., Rix, H., Slater, C., …Waters, C. (2014). A New Distant Milky Way Globular Cluster in the Pan-STARRS1 3π Survey. Astrophysical Journal Letters, 786(1), Article L3. https://doi.org/10.1088/2041-8205/786/1/l3

We present a new satellite in the outer halo of the Galaxy, the first Milky Way satellite found in the stacked photometric catalog of the Panoramic Survey Telescope and Rapid Response System 1 (Pan-STARRS1) Survey. From follow-up photometry obtained... Read More about A New Distant Milky Way Globular Cluster in the Pan-STARRS1 3π Survey.

Pan-STARRS 1 Observations of the Unusual Active Centaur P/2011 S1(Gibbs) (2014)
Journal Article
Lin, H., Chen, Y., Lacerda, P., Ip, W., Holman, M., Protopapas, P., …Price, P. (2014). Pan-STARRS 1 Observations of the Unusual Active Centaur P/2011 S1(Gibbs). Astronomical Journal, 147(5), Article 114. https://doi.org/10.1088/0004-6256/147/5/114

P/2011 S1 (Gibbs) is an outer solar system comet or active Centaur with a similar orbit to that of the famous 29P/Schwassmann-Wachmann 1. P/2011 S1 (Gibbs) has been observed by the Pan-STARRS 1 (PS1) sky survey from 2010 to 2012. The resulting data a... Read More about Pan-STARRS 1 Observations of the Unusual Active Centaur P/2011 S1(Gibbs).

Pre-outburst observations of Nova Del 2013 from Pan-STARRS 1 (2014)
Journal Article
Deacon, N., Hoard, D., Magnier, E., Jadhav, Y., Huber, M., Chambers, K., …Waters, C. (2014). Pre-outburst observations of Nova Del 2013 from Pan-STARRS 1. Astronomy & Astrophysics, 563, https://doi.org/10.1051/0004-6361/201423665

Context. Nova Delphini 2013 was identified on the 14th of August 2013 and eventually rose to be a naked eye object. Aims. We sought to study the behaviour of the object in the run-up to outburst and to compare it to the pre-outburst photometric chara... Read More about Pre-outburst observations of Nova Del 2013 from Pan-STARRS 1.

Characterization of the Praesepe Star Cluster by Photometry and Proper Motions with 2MASS, PPMXL, and Pan-STARRS (2014)
Journal Article
Wang, P., Chen, W., Lin, C., Pandey, A., Huang, C., Panwar, N., …Waters, C. (2014). Characterization of the Praesepe Star Cluster by Photometry and Proper Motions with 2MASS, PPMXL, and Pan-STARRS. Astrophysical Journal, 784(1), https://doi.org/10.1088/0004-637x/784/1/57

Membership identification is the first step in determining the properties of a star cluster. Low-mass members in particular could be used to trace the dynamical history, such as mass segregation, stellar evaporation, or tidal stripping, of a star clu... Read More about Characterization of the Praesepe Star Cluster by Photometry and Proper Motions with 2MASS, PPMXL, and Pan-STARRS.

Measuring Distances and Reddenings for a Billion Stars: Toward a 3D Dust Map from Pan-STARRS 1 (2014)
Journal Article
Green, G., Schlafly, E., Finkbeiner, D., Jurić, M., Rix, H., Burgett, W., …Waters, C. (2014). Measuring Distances and Reddenings for a Billion Stars: Toward a 3D Dust Map from Pan-STARRS 1. Astrophysical Journal, 783(2), Article 114. https://doi.org/10.1088/0004-637x/783/2/114

We present a method to infer reddenings and distances to stars based only on their broad-band photometry, and show how this method can be used to produce a three-dimensional (3D) dust map of the Galaxy. Our method samples from the full probability de... Read More about Measuring Distances and Reddenings for a Billion Stars: Toward a 3D Dust Map from Pan-STARRS 1.

The Pan-STARRS1 Medium-Deep Survey: The Role of Galaxy Group Environment in the Star Formation Rate versus Stellar Mass Relation and Quiescent Fraction out to z ~ 0.8 (2014)
Journal Article
Lin, L., Jian, H., Foucaud, S., Norberg, P., Bower, R., Cole, S., …Waters, C. (2014). The Pan-STARRS1 Medium-Deep Survey: The Role of Galaxy Group Environment in the Star Formation Rate versus Stellar Mass Relation and Quiescent Fraction out to z ~ 0.8. Astrophysical Journal, 782(1), Article 33. https://doi.org/10.1088/0004-637x/782/1/33

Using a large optically selected sample of field and group galaxies drawn from the Pan-STARRS1 Medium-Deep Survey (PS1/MDS), we present a detailed analysis of the specific star formation rate (SSFR)—stellar mass (M *) relation, as well as the quiesce... Read More about The Pan-STARRS1 Medium-Deep Survey: The Role of Galaxy Group Environment in the Star Formation Rate versus Stellar Mass Relation and Quiescent Fraction out to z ~ 0.8.

The superluminous supernova PS1-11ap: bridging the gap between low and high redshift (2014)
Journal Article
McCrum, M., Smartt, S., Kotak, R., Rest, A., Jerkstrand, A., Inserra, C., …Wainscoat, R. (2014). The superluminous supernova PS1-11ap: bridging the gap between low and high redshift. Monthly Notices of the Royal Astronomical Society, 437(1), 656-674. https://doi.org/10.1093/mnras/stt1923

We present optical photometric and spectroscopic coverage of the superluminous supernova (SLSN) PS1-11ap, discovered with the Pan-STARRS1 Medium Deep Survey at z = 0.524. This intrinsically blue transient rose slowly to reach a peak magnitude of Mu =... Read More about The superluminous supernova PS1-11ap: bridging the gap between low and high redshift.

Pan-STARRS1: Galaxy clustering in the Small Area Survey 2 (2014)
Journal Article
Farrow, D. J., Cole, S., Metcalfe, N., Draper, P., Norberg, P., Foucaud, S., …Waters, C. (2014). Pan-STARRS1: Galaxy clustering in the Small Area Survey 2. Monthly Notices of the Royal Astronomical Society, 437(1), 748-770. https://doi.org/10.1093/mnras/stt1933

The Panoramic Survey Telescope and Rapid Response System 1 survey is currently obtaining imaging in five bands (gP1, rP1, iP1, zP1 and yP1) for the 3π steradian survey, one of the largest optical surveys ever conducted. The finished survey will have... Read More about Pan-STARRS1: Galaxy clustering in the Small Area Survey 2.

Perseus I: a distant satellite dwarf galaxy of Andromeda (2013)
Journal Article
Martin, N., Schlafly, E., Slater, C., Bernard, E., Rix, H., Bell, E., …Waters, C. (2013). Perseus I: a distant satellite dwarf galaxy of Andromeda. Astrophysical Journal Letters, 779(1), Article L10. https://doi.org/10.1088/2041-8205/779/1/l10

We present the discovery of a new dwarf galaxy, Perseus I/Andromeda XXXIII, found in the vicinity of Andromeda (M31) in stacked imaging data from the Pan-STARRS1 3π survey. Located 27fdg9 away from M31, Perseus I has a heliocentric distance of 785 ±... Read More about Perseus I: a distant satellite dwarf galaxy of Andromeda.

A Search for Fast Optical Transients in the Pan-STARRS1 Medium-Deep Survey: M-Dwarf Flares, Asteroids, Limits on Extragalactic Rates, and Implications for LSST (2013)
Journal Article
Berger, E., Leibler, C., Chornock, R., Rest, A., Foley, R., Soderberg, A., …Tonry, J. (2013). A Search for Fast Optical Transients in the Pan-STARRS1 Medium-Deep Survey: M-Dwarf Flares, Asteroids, Limits on Extragalactic Rates, and Implications for LSST. Astrophysical Journal, 779(1), Article 18. https://doi.org/10.1088/0004-637x/779/1/18

We present a search for fast optical transients (τ ~ 0.5 hr-1 day) using repeated observations of the Pan-STARRS1 Medium-Deep Survey (PS1/MDS) fields. Our search takes advantage of the consecutive g P1 r P1 observations (16.5 minutes in each filter),... Read More about A Search for Fast Optical Transients in the Pan-STARRS1 Medium-Deep Survey: M-Dwarf Flares, Asteroids, Limits on Extragalactic Rates, and Implications for LSST.

The Extremely Red, Young L Dwarf PSO J318.5338-22.8603: A Free-Floating Planetary-Mass Analog to Directly Imaged Young Gas-Giant Planets (2013)
Journal Article
Liu, M., Magnier, E., Deacon, N., Allers, K., Dupuy, T., Kotson, M., …Wainscoat, R. (2013). The Extremely Red, Young L Dwarf PSO J318.5338-22.8603: A Free-Floating Planetary-Mass Analog to Directly Imaged Young Gas-Giant Planets. Astrophysical Journal Letters, 777(2), Article L20. https://doi.org/10.1088/2041-8205/777/2/l20

We have discovered using Pan-STARRS1 an extremely red late-L dwarf, which has (J – K)MKO = 2.78 and (J – K)2MASS = 2.84, making it the reddest known field dwarf and second only to 2MASS J1207–39b among substellar companions. Near-IR spectroscopy show... Read More about The Extremely Red, Young L Dwarf PSO J318.5338-22.8603: A Free-Floating Planetary-Mass Analog to Directly Imaged Young Gas-Giant Planets.

The Pan-STARRS1 Small Area Survey 2 (2013)
Journal Article
Metcalfe, N., Farrow, D., Cole, S., Draper, P., Norberg, P., Burgett, W., …Waters, C. (2013). The Pan-STARRS1 Small Area Survey 2. Monthly Notices of the Royal Astronomical Society, 435(3), 1825-1839. https://doi.org/10.1093/mnras/stt1343

The Panoramic Survey Telescope and Rapid Response System 1 (Pan-STARRS1) survey is acquiring multi-epoch imaging in five bands (gP1, rP1, iP1, zP1, yP1) over the entire sky north of declination −30° (the 3π survey). In 2011 July a test area of about... Read More about The Pan-STARRS1 Small Area Survey 2.

Super-Luminous Type Ic Supernovae: Catching a Magnetar by the Tail (2013)
Journal Article
Inserra, C., Smartt, S., Jerkstrand, A., Valenti, S., Fraser, M., Wright, D., …Young, D. (2013). Super-Luminous Type Ic Supernovae: Catching a Magnetar by the Tail. Astrophysical Journal, 770(2), Article 128. https://doi.org/10.1088/0004-637x/770/2/128

We report extensive observational data for five of the lowest redshift Super-Luminous Type Ic Supernovae (SL-SNe Ic) discovered to date, namely, PTF10hgi, SN2011ke, PTF11rks, SN2011kf, and SN2012il. Photometric imaging of the transients at +50 to +23... Read More about Super-Luminous Type Ic Supernovae: Catching a Magnetar by the Tail.

The VLT LBG Redshift Survey - III. The clustering and dynamics of Lyman-break galaxies at z~3 (2013)
Journal Article
Bielby, R., Hill, M., Shanks, T., Crighton, N., Infante, L., Bornancini, C., …Weilbacher, P. (2013). The VLT LBG Redshift Survey - III. The clustering and dynamics of Lyman-break galaxies at z~3. Monthly Notices of the Royal Astronomical Society, 430(1), 425-449. https://doi.org/10.1093/mnras/sts639

We present a catalogue of 2135 galaxy redshifts from the VLT LBG Redshift Survey (VLRS), a spectroscopic survey of z ≈ 3 galaxies in wide fields centred on background quasi-stellar objects. We have used deep optical imaging to select galaxies via the... Read More about The VLT LBG Redshift Survey - III. The clustering and dynamics of Lyman-break galaxies at z~3.

Sub-millimetre source identifications and the microjansky source population at 8.4 GHz in the William Herschel Deep Field (2013)
Journal Article
Heywood, I., Bielby, R., Hill, M., Metcalfe, N., Rawlings, S., Shanks, T., & Smirnov, O. (2013). Sub-millimetre source identifications and the microjansky source population at 8.4 GHz in the William Herschel Deep Field. Monthly Notices of the Royal Astronomical Society, 428(2), 935-951. https://doi.org/10.1093/mnras/sts046

Sub-millimetre observations of the William Herschel Deep Field (WHDF) using the Large Apex Bolometer Camera (LABOCA) revealed possible sub-mm counterparts for two X-ray-absorbed quasars. The primary aim here is to exploit Expanded Very Large Array (E... Read More about Sub-millimetre source identifications and the microjansky source population at 8.4 GHz in the William Herschel Deep Field.

Submillimetre observations of X-ray active galactic nuclei in the William Herschel Deep Field (2012)
Journal Article
Bielby, R., Hill, M., Metcalfe, N., & Shanks, T. (2012). Submillimetre observations of X-ray active galactic nuclei in the William Herschel Deep Field. Monthly Notices of the Royal Astronomical Society, 419(2), 1315-1323. https://doi.org/10.1111/j.1365-2966.2011.19787.x

We investigate the contribution made by active galactic nuclei (AGN) to the high-redshift, luminous, submillimetre (submm) source population using deep (≤2 mJy beam−1) Large Apex Bolometer Camera (LABOCA) 870 Graphicm observations within the William... Read More about Submillimetre observations of X-ray active galactic nuclei in the William Herschel Deep Field.

ULTRA-BRIGHT OPTICAL TRANSIENTS ARE LINKED WITH TYPE Ic SUPERNOVAE (2010)
Journal Article
Pastorello, A., Smartt, S., Botticella, M., Maguire, K., Fraser, M., Smith, K., …Wynn-Williams, C. (2010). ULTRA-BRIGHT OPTICAL TRANSIENTS ARE LINKED WITH TYPE Ic SUPERNOVAE. Astrophysical Journal Letters, 724(1), L16-L21. https://doi.org/10.1088/2041-8205/724/1/l16

Recent searches by unbiased, wide-field surveys have uncovered a group of extremely luminous optical transients. The initial discoveries of SN 2005ap by the Texas Supernova Search and SCP-06F6 in a deep Hubble pencil beam survey were followed by the... Read More about ULTRA-BRIGHT OPTICAL TRANSIENTS ARE LINKED WITH TYPE Ic SUPERNOVAE.

Cosmic Frontiers. (2007)
Book
Metcalfe, N., & Shanks, T. (Eds.). (2007). Cosmic Frontiers. Sheridan Books

Cosmological Parameters 2006 (2007)
Presentation / Conference Contribution
Sánchez, A., & Baugh, C. (2007). Cosmological Parameters 2006. In N. Metcalfe, & T. Shanks (Eds.), Cosmic Frontiers: proceedings of a conference held at Department of Physics, Durham University, Durham, UK, 31 July-4 August 2006

Recent measurements of the cosmic microwave background radiation (CMB), particularly when combined with other datasets, have revolutionised our knowledge of the values of the basic cosmological parameters. Here we summarize the state of play at the e... Read More about Cosmological Parameters 2006.

Cosmic cookery: making a stereoscopic 3D animated movie (2006)
Presentation / Conference Contribution
Holliman, N. S., Baugh, C., Frenk, C., Jenkins, A., Froner, B., Hassaine, D., …Okamoto, T. (2006). Cosmic cookery: making a stereoscopic 3D animated movie. In A. J. Woods, N. A. Dodgson, J. O. Merritt, M. T. Bolas, & I. E. McDowall (Eds.), Stereoscopic displays and virtual reality systems XIII : 16-19 January, 2006, San Jose, California, USA. https://doi.org/10.1117/12.646644

This paper describes our experience making a short stereoscopic movie visualizing the development of structure in the universe during the 13.7 billion years from the Big Bang to the present day. Aimed at a general audience for the Royal Society's 200... Read More about Cosmic cookery: making a stereoscopic 3D animated movie.

A New Era in Cosmology (2002)
Book
Metcalfe, N., & Shanks, T. (Eds.). (2002). A New Era in Cosmology. Sheridan Books

Do Galaxies Form at High Redshift? (2002)
Presentation / Conference Contribution
Metcalfe, N., Shanks, T., Fong, D., McCracken, H. J., Campos, A., Gardner, J. P., & Thompson, D. (2002). Do Galaxies Form at High Redshift?.

Evidence for Galaxy Formation at High Redshift. (2001)
Presentation / Conference Contribution
Shanks, T., Metcalfe, N., Fong, D., McCracken, H., Campos, A., & Thompson, D. (2001). Evidence for Galaxy Formation at High Redshift. In M. Harwit, & M. G. Hauser (Eds.),

We present new evidence that simple evolutionary models where the star-formation rate in galaxies increases exponentially with redshift but the space density of galaxies remains constant with redshift, give very precise fits to the number count of Ly... Read More about Evidence for Galaxy Formation at High Redshift..

Galaxy number counts - V. Ultradeep counts: the Herschel and Hubble deep fields (2001)
Journal Article
Metcalfe, N., Shanks, T., Campos, A., McCracken, H., & Fong, R. (2001). Galaxy number counts - V. Ultradeep counts: the Herschel and Hubble deep fields. Monthly Notices of the Royal Astronomical Society, 323(4), 795-830. https://doi.org/10.1046/j.1365-8711.2001.04168.x

We present u, b, r and i galaxy number counts and colours from both the North and South Hubble Space Telescope Deep Fields and the William Herschel Deep Field. The latter comprises a 7×7 arcmin2 area of sky, reaching b28.5 at its deepest. Following M... Read More about Galaxy number counts - V. Ultradeep counts: the Herschel and Hubble deep fields.

Photometric Study of the Improved GRB 970815 Error Box. (2000)
Presentation / Conference Contribution
Gorosabel, J., Castro-Tirado, A., Benítez, N., Zapatero-Osorio, M., Campos, A., Trapero, J., …Metcalfe, N. (2000). Photometric Study of the Improved GRB 970815 Error Box.

Galaxy Clustering in the Herschel Deep Field. (2000)
Presentation / Conference Contribution
McCracken, H., Metcalfe, N., Shanks, T., Fong, R., Campos, A., & Gardner, J. P. (2000). Galaxy Clustering in the Herschel Deep Field. In A. Mazure, O. Le Fèvre, & V. Le Brun (Eds.),

Galaxy clustering in the Herschel Deep Field (2000)
Journal Article
McCracken, H., Shanks, T., Metcalfe, N., Fong, R., & Campos, A. (2000). Galaxy clustering in the Herschel Deep Field. Monthly Notices of the Royal Astronomical Society, 318, 913-924

A Search for Optical Afterglow from GRB970828 (1998)
Presentation / Conference Contribution
Groot, P., Galama, T., van Paradijs, J., Kouveliotou, C., Vanderspek, R., Castro-Tirado, A., …Metcalfe, N. (1998). A Search for Optical Afterglow from GRB970828. In C. A. Meegan, R. D. Preece, & T. M. Koshut (Eds.), Gamma-ray bursts: 4th Huntsville symposium, Huntsville, AL September 1997 (557-560)

A Search for Optical Afterglow from GRB 970828. (1998)
Journal Article
Groot, P., Galama, T., van Paradijs, J., Kouveliotou, C., Wijers, R., Bloom, J., …Schwarz, R. (1998). A Search for Optical Afterglow from GRB 970828. Astrophysical Journal, 493(1), L27-L30. https://doi.org/10.1086/311125

We report on the results of R-band observations of the error box of the γ-ray burst of 1997 August 28 made between 4 hr and 8 days after this burst occurred. No counterpart was found varying by more than 0.2 mag down to R=23.8. We discuss the consequ... Read More about A Search for Optical Afterglow from GRB 970828..

Faint Galaxy Number Counts. (1996)
Presentation / Conference Contribution
Metcalfe, N., Shanks, T., Fong, R., Gardner, J., & Roche, N. (1996). Faint Galaxy Number Counts. In R. Bender, & R. Davies (Eds.),

Galaxy formation at high redshifts (1996)
Journal Article
Metcalfe, N., Shanks, T., Campos, A., Fong, R., & Gardner, J. (1996). Galaxy formation at high redshifts. Nature, 383, 236-

Photometric Calibration and Large-Scale Clustering in the Universe. (1994)
Presentation / Conference Contribution
Fong, R., Metcalfe, N., & Shanks, T. (1994). Photometric Calibration and Large-Scale Clustering in the Universe. In H. T. MacGillivray, E. B. Thomson, B. M. Lasker, I. N. Reid, D. F. Malin, R. M. West, & H. Lorenz (Eds.),

Galaxy Number-Counts to B =28<sup>m</sup> (1994)
Presentation / Conference Contribution
Metcalfe, N., Shanks, T., Roche, N., & Fong, R. (1994). Galaxy Number-Counts to B =28m. In H. MacGillivray, E. Thomson, B. Lasker, I. Reid, D. Malin, R. West, & H. Lorenz (Eds.),

Galaxy Clustering to B = 27<sup>m</sup>. (1994)
Presentation / Conference Contribution
Roche, N., Shanks, T., Metcalfe, N., & Fong, R. (1994). Galaxy Clustering to B = 27m. In H. MacGillivray, E. Thomson, B. Lasker, I. Reid, D. Malin, R. West, & H. Lorenz (Eds.),

Galaxy Clustering at B ~ 25m (1993)
Presentation / Conference Contribution
Roche, N., Shanks, T., Metcalfe, N., Fong, R., & West, R. (1993). Galaxy Clustering at B ~ 25m.

Galaxy Number-Counts to B = 28<SUP>m</SUP> (1993)
Presentation / Conference Contribution
Metcalfe, N., Shanks, T., Roche, N., & Fong, R. (1993). Galaxy Number-Counts to B = 28m. In C. W. Akerlof, & M. A. Srednicki (Eds.),

CCD galaxy counts to B = 25 M (1987)
Presentation / Conference Contribution
Metcalfe, N., Fong, R., Jones, L., & Shanks, T. (1987). CCD galaxy counts to B = 25 M.

The morphology of clusters of galaxies (1980)
Journal Article
Carter, D., & Metcalfe, N. (1980). The morphology of clusters of galaxies. Monthly Notices of the Royal Astronomical Society, 191, 325-337