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

Journal
Date Issued
2017
Author(s)
Luo, B.
•
Brandt, W. N.
•
Xue, Y. Q.
•
Lehmer, B.
•
Alexander, D. M.
•
Bauer, F. E.
•
•
Yang, G.
•
Basu-Zych, A. R.
•
•
•
Gu, Q. -S.
•
Hornschemeier, A. E.
•
Koekemoer, A.
•
Liu, T.
•
Mainieri, V.
•
•
Ranalli, P.
•
Rosati, P.
•
Schneider, D. P.
•
Shemmer, O.
•
Smail, I.
•
Sun, M.
•
•
Vignali, C.
•
Wang, J. -X.
DOI
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 ({K}s≤slant 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).
Volume
228
Issue
1
Start page
2
Uri
Url
Issn Identifier
0067-0049
Ads BibCode
2017ApJS..228....2L
Rights
open.access
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