[Surveys -- Oral ]
The Chandra COSMOS Survey: Early Results
Martin Elvis, Harvard-Smithsonnian Center for Astrophysics
and the Chandra COSMOS Team
he Chandra COSMOS Survey used ACIS-I to cover 0.5 sq.deg. to
160 ksec depth and an additional 0.4 sq.deg to 80 ksec, observed primarily
in 2007. The C-COSMOS combination of depth and area produces large
numbers of sources, 1761 point and some 200 extended sources. These
numbers allow for good statistics on previously sparse samples (e.g.
high z quasars), and for the discovery of rare classes of objects (e.g.
double AGNs). The depth of C-COSMOS is well matched to the depth of the
40+ complementary imaging bands from radio to UV for the COSMOS field,
which enabled >95\% identifications rates, SEDs and accurate photo-zs to
be found rapidly. All the sources and identifications are now submitted
or in press.We present the latest early science results including: (1) z>3 quasars
logN-logS, (2) a population of joint starburst/obscured AGN galaxies,
(3) AGN vs. Starburst clustering, (4) Weak Lensing masses for AGN dark
matter haloes, (5) off-nuclear (ULX?) objects, (6) Double AGNs, including
CID-42 which shows high velocity redshifted Fe-K absorption, which we
interpret as a 'backlit wind'.