Outputs (370)

The Galactic high mass X-ray binary population with Fermi-LAT (2022)
Journal Article

We search for γ-ray emission from 114 Galactic high-mass X-ray binaries, including four well studied catalogued sources, in 12.5 yr of Fermi-LAT data in conjunction with the 10-yr point source catalogue. Where a γ-ray excess appears to be spatially c... Read More about The Galactic high mass X-ray binary population with Fermi-LAT.

Gadolinium loaded Cherenkov detectors for neutron monitoring in high energy air showers (2022)
Journal Article

Monitoring of high energy cosmic ray neutrons is of particular interest for cosmic ray water Cherenkov detectors as intense bundles of delayed neutrons have been found to arrive after the initial passage of a high energy air shower. In this paper we... Read More about Gadolinium loaded Cherenkov detectors for neutron monitoring in high energy air showers.

Concept validation of a high dynamic range point-diffraction interferometer for wavefront sensing in adaptive optics (2022)
Journal Article

The direct detection and imaging of exoplanets requires the use of high-contrast adaptive optics (AO). In these systems quasi-static aberrations need to be highly corrected and calibrated. To achieve this, the pupil-modulated point-diffraction interf... Read More about Concept validation of a high dynamic range point-diffraction interferometer for wavefront sensing in adaptive optics.

On-sky results for the integrated microlens ring tip-tilt sensor (2021)
Journal Article

We present the first on-sky results of the microlens ring tip-tilt sensor. This sensor uses a 3D printed microlens ring feeding six multimode fibers to sense misaligned light, allowing centroid reconstruction. A tip-tilt mirror allows the beam to be... Read More about On-sky results for the integrated microlens ring tip-tilt sensor.

Scintillation-limited photometry with the 20-cm NGTS telescopes at Paranal Observatory (2021)
Journal Article

Ground-based photometry of bright stars is expected to be limited by atmospheric scintillation, although in practice observations are often limited by other sources of systematic noise. We analyse 122 nights of bright star (Gmag ≲ 11.5) photometry us... Read More about Scintillation-limited photometry with the 20-cm NGTS telescopes at Paranal Observatory.

Probing the physical properties of the intergalactic medium using blazars (2021)
Journal Article

We use Swift blazar spectra to estimate the key intergalactic medium (IGM) properties of hydrogen column density (NHXIGM), metallicity, and temperature over a redshift range of 0.03 ≤ z ≤ 4.7, using a collisional ionization equilibrium model for the... Read More about Probing the physical properties of the intergalactic medium using blazars.

The high-energy Sun - probing the origins of particle acceleration on our nearest star (2021)
Journal Article

As a frequent and energetic particle accelerator, our Sun provides us with an excellent astrophysical laboratory for understanding the fundamental process of particle acceleration. The exploitation of radiative diagnostics from electrons has shown th... Read More about The high-energy Sun - probing the origins of particle acceleration on our nearest star.

Scintillating thermal neutron detectors for cosmic ray soil moisture monitoring (2021)
Journal Article

Cosmic Ray Neutron Sensing (CRNS) is a powerful technique that allows non-invasive monitoring of soil moisture on length scales well matched for agricultural applications. One factor limiting the use of the technique within industrial agriculture set... Read More about Scintillating thermal neutron detectors for cosmic ray soil moisture monitoring.

Astrosat: forecasting satellite transits for optical astronomical observations (2021)
Journal Article

The impact of large-scale constellations of satellites, is a concern for ground-based astronomers. In recent years there has been a significant increase in the number of satellites in low-Earth orbit and this trend is set to continue. The large numbe... Read More about Astrosat: forecasting satellite transits for optical astronomical observations.

Magnetic imaging of the outer solar atmosphere (MImOSA) (2021)
Journal Article

The magnetic activity of the Sun directly impacts the Earth and human life. Likewise, other stars will have an impact on the habitability of planets orbiting these host stars. Although the magnetic field at the surface of the Sun is reasonably well c... Read More about Magnetic imaging of the outer solar atmosphere (MImOSA).

VERITAS Discovery of VHE Emission from the Radio Galaxy 3C 264: A Multiwavelength Study (2020)
Journal Article

Direct measurement of stellar angular diameters by the VERITAS Cherenkov telescopes (2019)
Journal Article

Full spectrum fluorescence lifetime imaging with 0.5 nm spectral and 50 ps temporal resolution (2021)
Journal Article

The use of optical techniques to interrogate wide ranging samples from semiconductors to biological tissue for rapid analysis and diagnostics has gained wide adoption over the past decades. The desire to collect ever more spatially, spectrally and te... Read More about Full spectrum fluorescence lifetime imaging with 0.5 nm spectral and 50 ps temporal resolution.

Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A (2018)
Journal Article

Fast infrared variability from the black hole candidate MAXI J1535−571 and tight constraints on the modelling (2021)
Journal Article

We present the results regarding the analysis of the fast X-ray/infrared (IR) variability of the black hole transient MAXI J1535−571. The data studied in this work consist of two strictly simultaneous observations performed with XMM–Newton (X-rays: 0... Read More about Fast infrared variability from the black hole candidate MAXI J1535−571 and tight constraints on the modelling.

HiPERCAM: a quintuple-beam, high-speed optical imager on the 10.4-m Gran Telescopio Canarias (2021)
Journal Article

HiPERCAM is a portable, quintuple-beam optical imager that saw first light on the 10.4-m Gran Telescopio Canarias (GTC) in 2018. The instrument uses re-imaging optics and four dichroic beamsplitters to record usgsrsiszs (320–1060 nm) images simultane... Read More about HiPERCAM: a quintuple-beam, high-speed optical imager on the 10.4-m Gran Telescopio Canarias.

Chronos: A NIR spectroscopic galaxy survey to probe the most fundamental stages of galaxy evolution (2021)
Journal Article

We propose a dedicated, ultra-deep spectroscopic survey in the near infrared (NIR), that will target a mass-limited sample of galaxies during two of the most fundamental epochs of cosmic evolution: the formation of the first galaxies (at z ≳ 6; cosmi... Read More about Chronos: A NIR spectroscopic galaxy survey to probe the most fundamental stages of galaxy evolution.

The Great Markarian 421 Flare of 2010 February: Multiwavelength Variability and Correlation Studies (2020)
Journal Article

V404 Cygni with Fermi-LAT (2021)
Journal Article

We revisit the well-studied outburst of the low-mass X-ray binary (LMXB) system V404 Cygni, and claims of γ-ray excesses observed with the Fermi-LAT instrument. Upon analysing an 11.5 yr data set with the 8-yr LAT point source catalogue and 8-yr back... Read More about V404 Cygni with Fermi-LAT.

Monte Carlo studies for the optimisation of the Cherenkov Telescope Array layout (2019)
Journal Article