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 Camera for Surveys (ACS) and parallel observations with NICMOS and WFPC2. A square field (1.8 deg2) has been imaged with single-orbit ACS I-band F814W exposures with 50% completeness for sources 0.5â³ in diameter at IAB= 26.0 mag. The ACS is a key part of the COSMOS survey, providing very high sensitivity and high-resolution (0.09â³ FWHM and 0.05â³ pixels) imaging and detecting a million objects. These images yield resolved morphologies for several hundred thousand galaxies. The small HST PSF also provides greatly enhanced sensitivity for weak-lensing investigations of the dark matter distribution.
Cosmos: Hubble space telescope observations / N. Scoville, R.G. Abraham, H. Aussel, J.E. Barnes, A. Benson, A.W. Blain, D. Calzetti, A. Comastri, P. Capak, C. Carilli, J.E. Carlstrom, C.M. Carollo, J. Colbert, E. Daddi, R.S. Ellis, M. Elvis, S.P. Ewald, M. Fall, A. Franceschini, M. Giavalisco, W. Green, R.E. Griffiths, L. Guzzo, G. Hasinger, C. Impey, J.-. Kneib, J. Koda, A. Koekemoer, O. Lefevre, S. Lilly, C.T. Liu, H.J. Mccracken, R. Massey, Y. Mellier, S. Miyazaki, B. Mobasher, J. Mould, C. Norman, A. Refregier, A. Renzini, J. Rhodes, M. Rich, D.B. Sanders, D. Schiminovich, E. Schinnerer, M. Scodeggio, K. Sheth, P.L. Shopbell, Y. Taniguchi, N.D. Tyson, C.M. Urry, L. Van Waerbeke, P. Vettolani, S.D.M. White, L. Yan. - In: ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES. - ISSN 0067-0049. - 172:1(2007), pp. 38-45. [10.1086/516580]
Cosmos: Hubble space telescope observations
L. Guzzo;
2007
Abstract
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 Camera for Surveys (ACS) and parallel observations with NICMOS and WFPC2. A square field (1.8 deg2) has been imaged with single-orbit ACS I-band F814W exposures with 50% completeness for sources 0.5â³ in diameter at IAB= 26.0 mag. The ACS is a key part of the COSMOS survey, providing very high sensitivity and high-resolution (0.09â³ FWHM and 0.05â³ pixels) imaging and detecting a million objects. These images yield resolved morphologies for several hundred thousand galaxies. The small HST PSF also provides greatly enhanced sensitivity for weak-lensing investigations of the dark matter distribution.
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