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Title:
AEGIS-X: the Chandra Deep Survey of the Extended Groth Strip
Authors:
Laird, E. S.; Nandra, K.; Georgakakis, A.; Aird, J. A.; Barmby, P.; Conselice, C. J.; Coil, A. L.; Davis, M.; Faber, S. M.; Fazio, G. G.; Guhathakurta, P.; Koo, D. C.; Sarajedini, V.; Willmer, C. N. A.
Affiliation:
AA(Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UK ), AB(Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UK ), AC(Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UK ), AD(Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UK ), AE(Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7, Canada ), AF(University of Nottingham, School of Physics and Astronomy, Nottingham NG7 2RD, UK ), AG(Steward Observatory, University of Arizona, Tucson, AZ 85721, USA ), AH(Department of Astronomy, University of California, Berkeley, CA 94720, USA ), AI(UCO/Lick Observatory, University of California, Santa Cruz, CA 95064, USA ), AJ(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AK(UCO/Lick Observatory, University of California, Santa Cruz, CA 95064, USA ), AL(UCO/Lick Observatory, University of California, Santa Cruz, CA 95064, USA ), AM(University of Florida, Department of Astronomy, Gainesville, FL 32611, USA), AN(Steward Observatory, University of Arizona, Tucson, AZ 85721, USA )
Publication:
The Astrophysical Journal Supplement, Volume 180, Issue 1, pp. 102-116 (2009). (ApJS Homepage)
Publication Date:
01/2009
Origin:
IOP
ApJ Keywords:
galaxies: active, galaxies: nuclei, surveys, X-rays: galaxies
DOI:
10.1088/0067-0049/180/1/102
Bibliographic Code:
2009ApJS..180..102L

Abstract

We present the AEGIS-X survey, a series of deep Chandra ACIS-I observations of the Extended Groth Strip. The survey comprises pointings at eight separate positions, each with nominal exposure of 200 ks, covering a total area of approximately 0.67 deg2 in a strip of length 2 degrees. We describe in detail an updated version of our data reduction and point-source-detection algorithms used to analyze these data. A total of 1325 band-merged sources have been found to a Poisson probability limit of 4 × 10-6, with limiting fluxes of 5.3 × 10-17 erg cm2 s-1 in the soft (0.5-2 keV) band and 3.8 × 10-16 erg cm-2 s-1 in the hard (2-10 keV) band. We present simulations verifying the validity of our source-detection procedure and showing a very small, <1.5%, contamination rate from spurious sources. Optical/NIR counterparts have been identified from the DEEP2, CFHTLS, and Spitzer/Infrared Array Camera (IRAC) surveys of the same region. Using a likelihood ratio method, we find optical counterparts for 76% of our sources, complete to R AB = 24.1, and, of the 66% of the sources that have IRAC coverage, 94% have a counterpart to a limit of 0.9 μJy at 3.6 μm (m AB = 23.8). After accounting for (small) positional offsets in the eight Chandra fields, the astrometric accuracy of Chandra positions is found to be 0farcs8 rms; however, this number depends both on the off-axis angle and the number of detected counts for a given source. All data products described in this paper are made available via a public Web site.

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