The Chandra Deep Field-South Survey: 7 Ms Source Catalogs
  We present X-ray source catalogs for the $\approx7$ Ms exposure of the
Chandra Deep Field-South (CDF-S), which covers a total area of 484.2
arcmin$^2$. 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 ($K_s\le23$)
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
$\approx4$ 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 $\approx1$ arcmin$^2$ region of
$\approx1.9\times10^{-17}$, $6.4\times10^{-18}$, and $2.7\times10^{-17}$ 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 $\approx50\,500$
deg$^{-2}$, and $47\%\pm4\%$ of these sources are AGNs ($\approx23\,900$
deg$^{-2}$).
