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The Chandra Deep Field-South Survey : 7 Ms source catalogs.

Luo, B. and Brandt, W.N. and Xue, Y.Q. and Lehmer, B. and Alexander, D.M. and Bauer, F.E. and Vito, F. and Yang, G. and Basu-Zych, A.R. and Comastri, A. and Gilli, R. and Gu, Q.-S. and Hornschemeier, A.E. and Koekemoer, A. and Liu, T. and Mainieri, V. and Paolillo, M. and Ranalli, P. and Rosati, P. and Schneider, D.P. and Shemmer, O. and Smail, I. and Sun, M. and Tozzi, P. and Vignali, C. and Wang, J.-X. (2017) 'The Chandra Deep Field-South Survey : 7 Ms source catalogs.', Astrophysical journal supplement series., 228 (1). p. 2.


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 (${K}_{s}\leqslant 23$) 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).

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Publisher statement:© 2016. The American Astronomical Society. All rights reserved.
Date accepted:07 November 2016
Date deposited:07 March 2017
Date of first online publication:27 December 2016
Date first made open access:07 March 2017

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