Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.8022c&link_type=abstract
American Astronomical Society Meeting 207, #80.22; Bulletin of the American Astronomical Society, Vol. 37, p.1300
Astronomy and Astrophysics
Astronomy
Scientific paper
The MUltiwavelength Survey by Yale-Chile (MUSYC) includes as one of its four 1/4-degree fields the Extended Chandra Deep Field-South (ECDFS), for which a recent public X-ray survey covered ˜1100 square arcminutes with 4 Chandra ACIS-I pointings centered on the original CDF-S field, to a depth of approximately 228 ks. This is the largest Chandra survey ever conducted at such depth. We detect 651 unique X-ray sources, of which 561 are detected in the full 0.5--8.0 keV band, 529 in the soft 0.5--2.0 keV band, and 335 in the hard 2.0--8.0 keV band. Seventy-three percent of the X-ray sources have optical counterparts in deep MUSYC imaging of this field while 26% have no apparent counterpart down to R=27.1 (AB). The remaining 1% have multiple optical counterparts within 1.5" of their X-ray position. We present the magnitude distributions and colors, as well as optical spectra of selected sources, and compare them to the X-ray properties. We discuss the nature of the underlying AGN populations, and implications for obscuration in AGN.
Coppi Paolo S.
Francke Harold
Gawiser Eric
MUSYC Collaboration
Treister Ezequiel
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