33 citations · 64 across the 2 of their papers we have counts for
5 papers · 1 filter
The Space Density of High-Redshift QSOs in the GOODS Survey
S. Cristiani, D. M. Alexander, F. Bauer +14
We present a sample of 17 high-redshift (3.5<z<5.2) QSO candidates in the 320 sq.arcmin area of the Great Observatories Origins Deep Survey, selected in the magnitude range 22.45<z…
A Possible New Population of Sources with Extreme X-Ray / Optical Ratios
Anton M. Koekemoer, D. M. Alexander, F. E. Bauer +13
We describe a possible new class of X-ray sources that have robust detections in ultra-deep Chandra data, yet have no detections at all in our deep multi-band GOODS Hubble Space Te…
Optical and Infrared Properties of the 2 Ms Chandra Deep Field-North X-ray Sources
A. J. Barger, L. L. Cowie, P. Capak +6
We present an optical and NIR catalog for the X-ray sources in the 2 Ms Chandra observation of the Hubble Deep Field-North region. We have high-quality multicolor images of all 503…
The Chandra Deep Field-North Survey. XV. Optically Bright, X-ray Faint Sources
A. E. Hornschemeier, F. E. Bauer, D. M. Alexander +7
We have analyzed optically bright, X-ray faint [OBXF; i.e., log(fX/fR) < -2] sources identified in an 178.9 square arcminute area within the Chandra Deep Field-North (CDF-N) 2 Ms s…
The Chandra Deep Field-North Survey. XIII. 2 Ms Point-Source Catalogs
D. M. Alexander, F. E. Bauer, W. N. Brandt +11
We present catalogs for the ~2 Ms Chandra Deep Field-North, currently the deepest X-ray observation of the Universe in the 0.5-8.0 keV band. Five hundred and three (503) X-ray sour…