Outputs (7)

Weak gravitational shear and flexion with polar shapelets (2007)
Journal Article
Massey, R., Rowe, B., Refregier, A., Bacon, D., & Bergé, J. (2007). Weak gravitational shear and flexion with polar shapelets. Monthly Notices of the Royal Astronomical Society, 380(1), 229-245. https://doi.org/10.1111/j.1365-2966.2007.12072.x

We derive expressions, in terms of ‘polar shapelets’, for the image distortion operations associated with weak gravitational lensing. Shear causes galaxy shapes to become elongated, and is sensitive to the second derivative of the projected gravitati... Read More about Weak gravitational shear and flexion with polar shapelets.

Weak gravitational lensing with COSMOS: Galaxy selection and shape measurements (2007)
Journal Article
Leauthaud, A., Massey, R., Kneib, J., Rhodes, J., Johnston, D. E., Capak, P., …Van Waerbeke, L. (2007). Weak gravitational lensing with COSMOS: Galaxy selection and shape measurements. Astrophysical Journal Supplement, 172(1), 219-238. https://doi.org/10.1086/516598

With a primary goal of conducting precision weak-lensing measurements from space, the COSMOS survey has imaged the largest contiguous area observed by Hubble Space Telescope to date, using the Advanced Camera for Surveys (ACS). This is the first pape... Read More about Weak gravitational lensing with COSMOS: Galaxy selection and shape measurements.

COSMOS: Hubble Space Telescope Observations (2007)
Journal Article
Scoville, N., Abraham, R., Aussel, H., Barnes, J., Benson, A., Blain, A., …Yan, L. (2007). COSMOS: Hubble Space Telescope Observations. Astrophysical Journal Supplement, 172(1), 38-45. https://doi.org/10.1086/516580

The Cosmic Evolution Survey (COSMOS) was initiated with an extensive allocation (590 orbits in Cycles 12-13) using the Hubble Space Telescope (HST) for high-resolution imaging. Here we review the characteristics of the HST imaging with the Advanced C... Read More about COSMOS: Hubble Space Telescope Observations.

COSMOS: Three-dimensional weak lensing and the growth of structure (2007)
Journal Article
Massey, R., Rhodes, J., Leauthaud, A., Capak, P., Ellis, R., Koekemoer, A., …Van Waerbeke, L. (2007). COSMOS: Three-dimensional weak lensing and the growth of structure. Astrophysical Journal Supplement, 172(1), 239-253. https://doi.org/10.1086/516599

We present a three-dimensional cosmic shear analysis of the Hubble Space Telescope COSMOS survey, the largest ever optical imaging program performed in space. We have measured the shapes of galaxies for the telltale distortions caused by weak gravita... Read More about COSMOS: Three-dimensional weak lensing and the growth of structure.

The stability of the point-spread function of the advanced camera for surveys on the Hubble Space Telescope and implications for weak gravitational lensing (2007)
Journal Article
Rhodes, J. D., Massey, R. J., Albert, J., Collins, N., Ellis, R. S., Heymans, C., …Van Waerbeke, L. (2007). The stability of the point-spread function of the advanced camera for surveys on the Hubble Space Telescope and implications for weak gravitational lensing. Astrophysical Journal Supplement, 172(1), 203-218. https://doi.org/10.1086/516592

We examine the spatial and temporal stability of the Hubble Space Telescope's Advanced Camera for Surveys (ACS) Wide Field Camera (WFC) point-spread function (PSF) using the 2 deg2 COSMOS survey. This is important for studies of weak gravitational le... Read More about The stability of the point-spread function of the advanced camera for surveys on the Hubble Space Telescope and implications for weak gravitational lensing.

The shear testing programme 2 : Factors affecting high-precision weak-lensing analyses (2007)
Journal Article
Massey, R., Heymans, C., Bergé, J., Bernstein, G., Bridle, S., Clowe, D., …Van Waerbeke, L. (2007). The shear testing programme 2 : Factors affecting high-precision weak-lensing analyses. Monthly Notices of the Royal Astronomical Society, 376(1), 13-38. https://doi.org/10.1111/j.1365-2966.2006.11315.x

The Shear Testing Programme (STEP) is a collaborative project to improve the accuracy and reliability of weak-lensing measurement, in preparation for the next generation of wide-field surveys. We review 16 current and emerging shear-measurement metho... Read More about The shear testing programme 2 : Factors affecting high-precision weak-lensing analyses.

Dark matter maps reveal cosmic scaffolding (2007)
Journal Article
Massey, R., Rhodes, J., Ellis, R., Scoville, N., Leauthaud, A., Finoguenov, A., …Taylor, J. (2007). Dark matter maps reveal cosmic scaffolding. Nature, 445(7125), 286-290. https://doi.org/10.1038/nature05497

Ordinary baryonic particles (such as protons and neutrons) account for only one sixth of the total matter in the Universe. The remainder is a mysterious ‘dark matter’ component, which does not interact via electromagnetism and thus neither emits nor... Read More about Dark matter maps reveal cosmic scaffolding.