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http://hdl.handle.net/20.500.12386/26837
Titolo: | The Chandra Deep Field-South Survey: 7 Ms Source Catalogs | Autori: | 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, Andrea GILLI, Roberto Gu, Q. -S. Hornschemeier, A. E. Koekemoer, A. Liu, T. Mainieri, V. Paolillo, Maurizio Ranalli, P. Rosati, P. Schneider, D. P. Shemmer, O. Smail, I. Sun, M. TOZZI, Paolo Vignali, C. Wang, J. -X. |
Data pubblicazione: | 2017 | Rivista: | THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | Numero: | 228 | Fascicolo: | 1 | Da pagina:: | 2 | 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 arcmin<SUP>2</SUP>. 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}<SUB>s</SUB>≤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 arcmin<SUP>2</SUP> region of ≈1.9 × 10<SUP>-17</SUP>, 6.4 × 10<SUP>-18</SUP>, and 2.7 × 10<SUP>-17</SUP> erg cm<SUP>-2</SUP> s<SUP>-1</SUP> 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<SUP>-2</SUP>, and 47% ± 4% of these sources are AGNs (≈23,900 deg<SUP>-2</SUP>). | URI: | http://hdl.handle.net/20.500.12386/26837 | URL: | https://iopscience.iop.org/article/10.3847/1538-4365/228/1/2/ | ISSN: | 0067-0049 | DOI: | 10.3847/1538-4365/228/1/2 | Bibcode ADS: | 2017ApJS..228....2L | Fulltext: | open |
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