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

Autor:	E. Daddi, Eva Schinnerer, O. Ilbert, Alberto Franceschini, S. J. Lilly, Y. Taniguchi, Jason Surace, Nick Scoville, Peter Capak, Jonathan Williams, Kartik Sheth, M. Elvis, H. J. McCracken, Anton M. Koekemoer, George Helou, Michael C. Liu, Joshua E. Barnes, Alvio Renzini, D. B. Sanders, Dave Frayer, H. Aussel, Bidushi Bhattacharya, Bahram Mobasher, C. M. Carollo, Andrea Comastri, Michael Fall, Mara Salvato, Lin Yan, David Thompson, Chris Impey, D. Calzetti, T. Y. Brooke, Andrew Blain, Richard S. Ellis, J. S. Kartaltepe, M. Rich, Chris Carilli, Patrick L. Shopbell, C. M. Urry, O. Le Fevre, M. Giavalisco, G. Hasinger
Rok vydání:	2007
Předmět:	Physics Complete data 010308 nuclear & particles physics Astronomy and Astrophysics Astrophysics Field survey 01 natural sciences Space and Planetary Science Asteroid 0103 physical sciences Cosmos (category theory) Cirrus 010303 astronomy & astrophysics Data reduction
Zdroj:	The Astrophysical Journal Supplement Series. 172:86-98
ISSN:	1538-4365 0067-0049
DOI:	10.1086/517885
Popis:	The Spitzer-COSMOS survey (S-COSMOS) is a Legacy program (Cycles 2+3) designed to carry out a uniform deep survey of the full 2 sq deg COSMOS field in all seven Spitzer bands (3.6, 4.5, 5.6, 8.0, 24.0, 70.0, 160.0 u). 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 24u 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 AGN out to z ~3 at 24u and out to z ~1.5-2 at 70u and 160u.
Databáze:	OpenAIRE
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