The Chandra Deep Field-South Survey : 7 Ms Source Catalogs

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DOI:
| Published | English
Authors:
Luo, B. ; Brandt, W.~N. ; Xue, Y.~Q. ; Lehmer, B. ; Alexander, D. M. ; Bauer, F. E. ; Vito, F. ; Yang, G. ; Basu-Zych, A. R. ; Comastri, A. ; Gilli, R. ; Gu, Q. S.
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Department:
Lund Observatory - Has been reorganised
Abstract:

We present X-ray source catalogs for the ≈7 Ms exposure of the Chandra Deep Field-South (CDF-S), which covers a total area of 484.2 arcmin2. Utilizing wavdetect for initial source detection and ACIS Extract for photometric extraction and significance assessment, we create a main source catalog containing 1008 sources that are detected in up to three X-ray bands: 0.5-7.0 keV, 0.5-2.0 keV, and 2-7 keV. A supplementary source catalog is also provided, including 47 lower-significance sources that have bright (Ks ≤ 23) near-infrared counterparts. We identify multiwavelength counterparts for 992 (98.4%) of the main-catalog sources, and we collect redshifts for 986 of these sources, including 653 spectroscopic redshifts and 333 photometric redshifts. Based on the X-ray and multiwavelength properties, we identify 711 active galactic nuclei (AGNs) from the main-catalog sources. Compared to the previous ≈4 Ms CDF-S catalogs, 291 of the main-catalog sources are new detections. We have achieved unprecedented X-ray sensitivity with average flux limits over the central ≈1 arcmin2 region of ≈1.9 ×10-17, 6.4 ×10-18, and 2.7 ×10-17 erg cm-2 s-1 in the three X-ray bands, respectively. We provide cumulative number-count measurements observing, for the first time, that normal galaxies start to dominate the X-ray source population at the faintest 0.5-2.0 keV flux levels. The highest X-ray source density reaches ≈50,500 deg-2, and 47% ± 4% of these sources are AGNs (≈23,900 deg-2).

Keywords:
catalogs ; cosmology: observations ; diffuse radiation ; galaxies: active ; surveys ; X-rays: galaxies Supporting material: extended figures, machine-readable tables
ISSN:
0067-0049
LUP-ID:
fc9c7570-f617-4318-acdc-35a68c1ce4e7 | Link: https://lup.lub.lu.se/record/fc9c7570-f617-4318-acdc-35a68c1ce4e7 | Statistics

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