THE CHANDRA DEEP FIELD-SOUTH SURVEY: 7 MS SOURCE CATALOGS

B. Luo, W. N. Brandt, Y. Q. Xue, B. Lehmer, D. M. Alexander, F. E. Bauer, F. Vito, G. Yang, A. R. Basu-Zych, A. Comastri, R. Gilli, Q. S. Gu, A. E. Hornschemeier, A. Koekemoer, T. Liu, V. Mainieri, M. Paolillo, P. Ranalli, P. Rosati, D. P. SchneiderO. Shemmer, I. Smail, M. Sun, P. Tozzi, C. Vignali, J. X. Wang

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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).

Original languageEnglish (US)
Article number2
JournalAstrophysical Journal, Supplement Series
Volume228
Issue number1
DOIs
StatePublished - Jan 2017

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    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., ... Wang, J. X. (2017). THE CHANDRA DEEP FIELD-SOUTH SURVEY: 7 MS SOURCE CATALOGS. Astrophysical Journal, Supplement Series, 228(1), [2]. https://doi.org/10.3847/1538-4365/228/1/2