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Cited by 434

The DOI matches its Crossref record; 58 of the 58 references it cites were found in a registry or an index.

Weak Gravitational Lensing with COSMOS: Galaxy Selection and Shape Measurements

Open access
Leauthaud, Alexie, Massey, Richard, Kneib, Jean‐Paul, Rhodes, Jason, Johnston, David E., Capak, Peter, Heymans, Catherine, Ellis, Richard S., Koekemoer, Anton M., Le Fevre, Oliver, Mellier, Yannick, Refregier, Alexandre, Robin, Annie C., Scoville, Nick, Tasca, Lidia, Taylor, James E., Van Waerbeke, Ludovic·2007·The Astrophysical Journal Supplement Series
DOI 10.1086/516598
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Abstract

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 paper in a series in which we describe our strategy for addressing the various technical challenges in the production of weak-lensing measurements from COSMOS data. We first construct a source catalog from 575 ACS/WFC tiles (1.64 deg 2 ) subsampled at a pixel scale of 0.03''. Defects and diffraction spikes are carefully removed, leaving a total of 1.2 × 10 6 objects to a limiting magnitude of F814W = 26.5. This catalog is made publicly available. Multiwavelength follow-up observations of the COSMOS field provide photometric redshifts for 73% of the source galaxies in the lensing catalog. We analyze and discuss the COSMOS redshift distribution and show broad agreement with other surveys to z ~ 1. Our next step is to measure the shapes of galaxies and correct them for the distortion induced by the time-varying ACS point-spread function and for charge transfer efficiency (CTE) effects. Simulated images are used to derive the shear susceptibility factors that are necessary in transforming shape measurements into unbiased shear estimators. For every galaxy we derive a shape measurement error and utilize this quantity to extract the intrinsic shape noise of the galaxy sample. Interestingly, our results indicate that intrinsic shape noise varies little with size, magnitude, or redshift. Representing a number density of 66 galaxies per arcmin 2 , the final COSMOS weak-lensing catalog contains 3.9 × 10 5 galaxies with accurate shape measurements. The properties of the COSMOS weak-lensing catalog described throughout this paper will provide key input numbers for the preparation and design of next-generation wide field space missions.

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Show all 58 references

Research works printed but not linked: 20

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Metadata

Authors
Leauthaud, A., Massey, R., Kneib, J., Rhodes, J., Johnston, D. E., Capak, P., Heymans, C., Ellis, R. S., Koekemoer, A. M., Le Fevre, O., Mellier, Y., Refregier, A., Robin, A. C., Scoville, N., Tasca, L., Taylor, J. E., & Van Waerbeke, L.
Venue
The Astrophysical Journal Supplement Series
Publisher
American Astronomical Society
Published
2007-09
Volume
172
Issue
1
Pages
219-238
ISSN
  • 0067-0049 (ISSN-L)
  • 1538-4365
DOI
10.1086/516598
OpenAlex
W2046315396
Cited by
434
References
58
FWCI
15.50
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Weak Gravitational Lensing with COSMOS: Galaxy Selection and Shape Measurements. https://app.cochat.ai/papers/10.1086/516598
The paper
Leauthaud, A., Massey, R., Kneib, J., Rhodes, J., Johnston, D. E., Capak, P., Heymans, C., Ellis, R. S., Koekemoer, A. M., Le Fevre, O., Mellier, Y., Refregier, A., Robin, A. C., Scoville, N., Tasca, L., Taylor, J. E., & Van Waerbeke, L. (2007). Weak Gravitational Lensing with COSMOS: Galaxy Selection and Shape Measurements. The Astrophysical Journal Supplement Series. https://doi.org/10.1086/516598

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