The Chandra Deep Field-South Survey: 4 Ms Source Catalogs

We present source catalogs for the 4 Ms Chandra Deep Field-South (CDF-S), which is the deepest Chandra survey to date and covers an area of 464.5 arcmin(2). We provide a main Chandra source catalog, which contains 740 X-ray sources that are detected with WAVDETECT at a false-positive probability threshold of 10(-5) in at least one of three X-ray bands (0.5-8 keV, full band; 0.5-2 keV, soft band; and 2-8 keV, hard band) and also satisfy a binomial-probability source-selection criterion of P 75% of the main-catalog sources are active galactic nuclei (AGNs); of the 300 new main-catalog sources, about 35% are likely normal and starburst galaxies, reflecting the rise of normal and starburst galaxies at the very faint flux levels uniquely accessible to the 4 Ms CDF-S. Near the center of the 4 Ms CDF-S (i.e., within an off-axis angle of 3'), the observed AGN and galaxy source densities have reached 9800(1100)(+1300) deg(-2) and 6900(900)(+1100) deg(-2), respectively. Simulations show that our main catalog is highly reliable and is reasonably complete. The mean backgrounds (corrected for vignetting and exposure-time variations) are 0.063 and 0.178 counts Ms-1 pixel(-1) (for a pixel size of 0 ''.492) for the soft and hard bands, respectively; the majority of the pixels have zero background counts. The 4 Ms CDF-S reaches on-axis flux limits of approximate to 3.2 x 10(-17), 9.1 x 10(-18), and 5.5 x 10(-17) erg cm(-2) s(-1) for the full, soft, and hard bands, respectively. An increase in the CDF-S exposure time by a factor of approximate to 2-2.5 would provide further significant gains and probe key unexplored discovery space