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

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.; Hornschemeier, A.E.; Koekemoer, A.; Liu, T.; Mainieri, V.; Paolillo, M.; Ranalli, P.; Rosati, P.; Schneider, D.P.; Shemmer, O.; Smail, I.; Sun, M.; Tozzi, P.; Vignali, C.; Wang, J.-X.

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

Citation

Luo, B., Brandt, W., Xue, Y., Lehmer, B., Alexander, D., Bauer, F., …Wang, J. (2017). The Chandra Deep Field-South Survey: 7 Ms Source Catalogs. Astrophysical Journal Supplement, 228(1), Article 2. https://doi.org/10.3847/1538-4365/228/1/2

• Journal Article Type: Article
• Acceptance Date: Nov 7, 2016
• Online Publication Date: Dec 27, 2016
• Publication Date: Jan 1, 2017
• Deposit Date: Feb 22, 2017
• Publicly Available Date: Mar 7, 2017
• Journal: Astrophysical Journal Supplement
• Print ISSN: 0067-0049
• Electronic ISSN: 1538-4365
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 228
• Issue: 1
• Article Number: 2
• DOI: https://doi.org/10.3847/1538-4365/228/1/2
• Public URL: https://durham-repository.worktribe.com/output/1385216
• Related Public URLs: https://arxiv.org/abs/1611.03501