Skip to main content

Research Repository

Advanced Search

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.

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


B. Luo

W.N. Brandt

Y.Q. Xue

B. Lehmer

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. Schneider

O. Shemmer

M. Sun

P. Tozzi

C. Vignali

J.-X. Wang


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).


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.

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
Public URL
Related Public URLs


Published Journal Article (8.2 Mb)

Copyright Statement
© 2016. The American Astronomical Society. All rights reserved.

You might also like

Downloadable Citations