Astrophysics> Astrophysics of Galaxies
arXiv:1506.01323 (astro-ph)
[Submitted on 3 Jun 2015]
Title:S-CANDELS: The Spitzer-Cosmic Assembly Near-Infrared Deep Extragalactic Survey. Survey Design, Photometry, and Deep IRAC Source Counts
Authors:M.L.N. Ashby, S.P. Willner, G.G. Fazio, J.S. Dunlop, E. Egami, S.M. Faber, H.C. Ferguson, N.A. Grogin, J.L. Hora, J.-S. Huang, A.M. Koekemoer, I. Labbe, Z. Wang
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Abstract:The Spitzer-Cosmic Assembly Deep Near-Infrared Extragalactic Legacy Survey (S-CANDELS; PI G. Fazio) is a Cycle 8 Exploration Program designed to detect galaxies at very high redshifts (z > 5). To mitigate the effects of cosmic variance and also to take advantage of deep coextensive coverage in multiple bands by the Hubble Space Telescope Multi-Cycle Treasury Program CANDELS, S-CANDELS was carried out within five widely separated extragalactic fields: the UKIDSS Ultra-Deep Survey, the Extended Chandra Deep Field South, COSMOS, the HST Deep Field North, and the Extended Groth Strip. S-CANDELS builds upon the existing coverage of these fields from the Spitzer Extended Deep Survey (SEDS) by increasing the integration time from 12 hours to a total of 50 hours but within a smaller area, 0.16 square degrees. The additional depth significantly increases the survey completeness at faint magnitudes. This paper describes the S-CANDELS survey design, processing, and publicly-available data products. We present IRAC dual-band 3.6+4.5 micron catalogs reaching to a depth of 26.5 AB mag. Deep IRAC counts for the roughly 135,000 galaxies detected by S-CANDELS are consistent with models based on known galaxy populations. The increase in depth beyond earlier Spitzer/IRAC surveys does not reveal a significant additional contribution from discrete sources to the diffuse Cosmic Infrared Background (CIB). Thus it remains true that only roughly half of the estimated CIB flux from COBE/DIRBE is resolved.
| Comments: | 23 pages, 19 figures, accepted by ApJS |
| Subjects: | Astrophysics of Galaxies (astro-ph.GA); Cosmology and Nongalactic Astrophysics (astro-ph.CO) |
| Cite as: | arXiv:1506.01323 [astro-ph.GA] |
| (or arXiv:1506.01323v1 [astro-ph.GA] for this version) | |
| https://doi.org/10.48550/arXiv.1506.01323
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