THE LARGE APEX BOLOMETER CAMERA SURVEY OF THE EXTENDED CHANDRA DEEP FIELD SOUTH

作者：A. Weiß, A. Kovács, K. E. K. Coppin, T. R. Greve, Fabian Walter, Ian R. Smail, J. S. Dunlop, Kirsten Kraiberg Knudsen, D. M. Alexander, F. Bertoldi, William Nielsen Brandt, S. C. Chapman, P. Cox, H. Dannerbauer, C. De Breuck, Eric Gawiser, Rob J. Ivison, Dieter Lutz, Karl M. Menten, Anton M. Koekemoer, E. Kreysa, Peter L. Kurczynski, Hans‐Walter Rix, Eva Schinnerer, Paul P. van der Werf · 发表于：The Astrophysical Journal · 年份：2009 · DOI：10.1088/0004-637x/707/2/1201 · 被引用次数：377 · 研究领域：Galaxies: Formation, Evolution, Phenomena、Astronomy and Astrophysical Research、Gamma-ray bursts and supernovae

We present a sensitive 870 μm survey of the Extended Chandra Deep Field South (ECDFS) combining 310 hr of observing time with the Large Apex BOlometer Camera (LABOCA) on the APEX telescope. The LABOCA ECDFS Submillimetre Survey (LESS) covers the full 30' × 30' field size of the ECDFS and has a uniform noise level of σ 870 μm ≈ 1.2 mJy beam −1 . LESS is thus the largest contiguous deep submillimeter survey undertaken to date. The noise properties of our map show clear evidence that we are beginning to be affected by confusion noise. We present a catalog of 126 submillimeter galaxies (SMGs) detected with a significance level above 3.7σ, at which level we expect five false detections given our map area of 1260 arcmin 2 . The ECDFS exhibits a deficit of bright SMGs relative to previously studied blank fields but not of normal star-forming galaxies that dominate the extragalactic background light (EBL). This is in line with the underdensities observed for optically defined high redshift source populations in the ECDFS (BzKs, DRGs, optically bright active galactic nucleus, and massive K-band-selected galaxies). The differential source counts in the full field are well described by a power law with a slope of α = −3.2, comparable to the results from other fields. We show that the shape of the source counts is not uniform across the field. Instead, it steepens in regions with low SMG density. Towards the highest overdensities we measure a source-count shape consistent with previous s...