The Chandra Deep Field-South Survey: 2 Ms Source Catalogs
B. Luo, F. E. Bauer, W. N. Brandt, D. M. Alexander, B. D. Lehmer, D., P. Schneider, M. Brusa, A. Comastri, A. C. Fabian, A. Finoguenov, R. Gilli,, G. Hasinger, A. E. Hornschemeier, A. Koekemoer, V. Mainieri, M. Paolillo, P., Rosati, O. Shemmer, J. D. Silverman, I. Smail

TL;DR
This paper presents comprehensive point-source catalogs from the deepest X-ray survey to date, covering an area of 436 arcmin^2 with high sensitivity, detecting 578 sources including many new ones, and providing multiwavelength data and redshifts.
Contribution
The study provides the most sensitive X-ray source catalog for the Chandra Deep Field-South, including new detections and supplementary catalogs with optical and infrared data, enhancing the resource for astrophysical research.
Findings
Detected 462 X-ray sources, 135 new compared to previous data
Approximately 55% of sources are AGN, 45% are starburst or normal galaxies
Provided optical counterparts and spectroscopic redshifts for many sources
Abstract
We present point-source catalogs for the ~2 Ms exposure of the Chandra Deep Field-South (CDF-S); this is one of the two most-sensitive X-ray surveys ever performed. The survey covers an area of ~436 arcmin^2 and reaches on-axis sensitivity limits of ~1.9x10^{-17} and ~1.3x10^{-16} ergs/cm^2/s for the 0.5-2.0 and 2-8 keV bands, respectively. Four hundred and sixty-two X-ray point sources are detected in at least one of three X-ray bands that were searched; 135 of these sources are new compared to the previous ~1 Ms CDF-S detections. Source positions are determined using centroid and matched-filter techniques; the median positional uncertainty is ~0.36". The X-ray-to-optical flux ratios of the newly detected sources indicate a variety of source types; ~55% of them appear to be active galactic nuclei while ~45% appear to be starburst and normal galaxies. In addition to the main Chandra…
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