A Caltech Library Service

S-COSMOS: The Spitzer Legacy Survey of the Hubble Space Telescope ACS 2 deg^2 COSMOS Field I: Survey Strategy and First Analysis

Sanders, D. B. and Salvato, M. and Aussel, H. and Ilbert, O. and Scoville, N. and Surace, J. A. and Frayer, D. and Sheth, K. and Helou, G. and Brooke, T. and Bhattacharya, B. and Yan, L. and Kartaltepe, J. S. and Barnes, J. E. and Blain, A. W. and Calzetti, D. and Capak, P. and Carilli, C. and Carollo, C. M. and Comastri, A. and Daddi, E. and Ellis, R. S. and Elvis, M. and Fall, S. M. and Franceschini, A. and Giavalisco, M. and Hasinger, G. and Impey, C. and Koekemoer, A. and Le Fèvre, O. and Lilly, S. and Liu, M. C. and McCracken, H. J. and Mobasher, B. and Renzini, A. and Rich, M. and Schinnerer, E. and Shopbell, P. L. and Taniguchi, Y. and Thompson, D. J. and Urry, C. M. and Williams, J. P. (2007) S-COSMOS: The Spitzer Legacy Survey of the Hubble Space Telescope ACS 2 deg^2 COSMOS Field I: Survey Strategy and First Analysis. Astrophysical Journal Supplement Series, 172 (1). pp. 86-98. ISSN 0067-0049. doi:10.1086/517885.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


The COSMOS Spitzer survey (S-COSMOS) is a Legacy program (Cycles 2+3) designed to carry out a uniform deep survey of the full 2 deg^2 COSMOS field in all seven Spitzer bands (3.6, 4.5, 5.6, 8.0, 24.0, 70.0, and 160.0 μm). This paper describes the survey parameters, mapping strategy, data reduction procedures, achieved sensitivities to date, and the complete data set for future reference. We show that the observed infrared backgrounds in the S-COSMOS field are within 10% of the predicted background levels. The fluctuations in the background at 24 μm have been measured and do not show any significant contribution from cirrus, as expected. In addition, we report on the number of asteroid detections in the low Galactic latitude COSMOS field. We use the Cycle 2 S-COSMOS data to determine preliminary number counts, and compare our results with those from previous Spitzer Legacy surveys (e.g., SWIRE, GOODS). The results from this "first analysis" confirm that the S-COSMOS survey will have sufficient sensitivity with IRAC to detect ~L^* disks and spheroids out to z ≳ 3, and with MIPS to detect ultraluminous starbursts and AGNs out to z ~ 3 at 24 μm and out to z ~ 1.5-2 at 70 and 160 μm.

Item Type:Article
Related URLs:
URLURL TypeDescription
Sanders, D. B.0000-0002-1233-9998
Salvato, M.0000-0001-7116-9303
Aussel, H.0000-0002-1371-5705
Ilbert, O.0000-0002-7303-4397
Scoville, N.0000-0002-0438-3323
Surace, J. A.0000-0001-7291-0087
Frayer, D.0000-0003-1924-1122
Sheth, K.0000-0002-5496-4118
Helou, G.0000-0003-3367-3415
Yan, L.0000-0003-1710-9339
Kartaltepe, J. S.0000-0001-9187-3605
Blain, A. W.0000-0001-7489-5167
Calzetti, D.0000-0002-5189-8004
Capak, P.0000-0003-3578-6843
Carilli, C.0000-0001-6647-3861
Carollo, C. M.0000-0003-1624-7609
Comastri, A.0000-0003-3451-9970
Daddi, E.0000-0002-3331-9590
Ellis, R. S.0000-0001-7782-7071
Giavalisco, M.0000-0002-7831-8751
Hasinger, G.0000-0002-0797-0646
Koekemoer, A.0000-0002-6610-2048
Le Fèvre, O.0000-0001-5891-2596
Lilly, S.0000-0002-6423-3597
Liu, M. C.0000-0003-2232-7664
McCracken, H. J.0000-0002-9489-7765
Renzini, A.0000-0002-7093-7355
Schinnerer, E.0000-0002-3933-7677
Taniguchi, Y.0000-0003-2247-3741
Urry, C. M.0000-0002-0745-9792
Williams, J. P.0000-0001-5058-695X
Additional Information:© 2007 American Astronomical Society. Print publication: Issue 1 (2007 September); received 2006 August 28; accepted for publication 2007 January 9. This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory (JPL), California Institute of Technology under NASA contract 1407. Support for this work was provided by NASA through contract 1278386 issued by the JPL. It is a pleasure to acknowledge the hospitality provided by the Aspen Center for Physics where the majority of this paper was written. Additional information on the S-COSMOS Legacy Survey is available from the main COSMOSWeb site at It is a pleasure to acknowledge the excellent services provided by the NASA IPAC/IRSA staff (Anastasia Laity, Anastasia Alexov, Bruce Berriman, and John Good) in providing online archive and server capabilities for the COSMOS data sets. We thank Guilaine Lagache for useful comments on power spectra measurements. We would also like to thank the referee for comments and suggestions which helped clarify our presentation. Facilities: HST (ACS), Spitzer (IRAC), Spitzer (MIPS)
Group:COSMOS, Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Subject Keywords:cosmology: observations; galaxies: evolution; galaxies: formation; infrared: galaxies; large-scale structure of universe; surveys
Issue or Number:1
Record Number:CaltechAUTHORS:20100310-103340276
Persistent URL:
Official Citation:S-COSMOS: The Spitzer Legacy Survey of the Hubble Space Telescope ACS 2 deg2 COSMOS Field I: Survey Strategy and First Analysis D. B. Sanders, M. Salvato, H. Aussel, O. Ilbert, N. Scoville, J. A. Surace, D. T. Frayer, K. Sheth, G. Helou, T. Brooke, B. Bhattacharya, L. Yan, J. S. Kartaltepe, J. E. Barnes, A. W. Blain, D. Calzetti, P. Capak, C. Carilli, C. M. Carollo, A. Comastri, E. Daddi, R. S. Ellis, M. Elvis, S. M. Fall, A. Franceschini, M. Giavalisco, G. Hasinger, C. Impey, A. Koekemoer, O. Le Fèvre, S. Lilly, M. C. Liu, H. J. McCracken, B. Mobasher, A. Renzini, M. Rich, E. Schinnerer, P. L. Shopbell, Y. Taniguchi, D. J. Thompson, C. M. Urry, and J. P. Williams 2007 ApJS 172 86-98 doi: 10.1086/517885
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:17715
Deposited On:10 Mar 2010 23:31
Last Modified:08 Nov 2021 23:38

Repository Staff Only: item control page