Abstract

The Chandra exposure on the Chandra Deep Field-South (CDF-S) has recently been increased to 7 Ms, making it the most sensitive extragalactic X-ray survey by a wide margin. About 1050 X-ray sources have been detected, primarily distant active galactic nuclei (AGNs) and starburst/normal galaxies. The unmatched deep multiwavelength coverage for these sources allows superb follow-up investigations; e.g., 98.4% of the X-ray sources have multiwavelength counterparts, and 97.8% have spectroscopic/photometric redshifts. I will briefly describe the sources in the 7 Ms CDF -S and some exciting first science results. The latter will include (1) constraints on supermassive black hole growth in the first galaxies as revealed by direct detection and stacking; (2) the relation between black-hole growth and host stellar mass; (3) long-term variability studies of the AGNs producing most of cosmic accretion power; and (4) the discovery of a representative of a new population of faint, fast X-ray transient sources.