AEGIS-X: Chandra deep survey Virtual Observatory Resource

Authors
  1. Laird E.S.
  2. Nandra K.
  3. Georgakakis A.
  4. Aird J.A.
  5. Barmby P.,Conselice C.J.
  6. Coil A.L.
  7. Davis M.
  8. Faber S.M.
  9. Fazio G.G.,Guhathakurta P.
  10. Koo D.C.
  11. Sarajedini V.
  12. Willmer C.N.A.
  13. Published by
    CDS
Abstract

We present the EGIS-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 200ks, covering a total area of approximately 0.67deg^2^ 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 4x10^-6^, with limiting fluxes of 5.3x10^-21^W/m2 in the soft (0.5-2keV) band and 3.8x10^-19^W/m2 in the hard (2-10keV) 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 0.9uJy at 3.6um (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 0"8rms; 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.

Keywords
  1. x-ray-sources
  2. surveys
  3. astronomical-object-identification
  4. photometry
Bibliographic source Bibcode
2009ApJS..180..102L
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/180/102
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJS/180/102
Document Object Identifer DOI
doi:10.26093/cds/vizier.21800102

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/180/102
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/180/102
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/180/102
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/180/102/aegis?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/180/102/aegis?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/180/102/aegis?

History

2009-11-17T17:52:32Z
Resource record created
2009-11-17T17:00:31Z
Updated
2009-11-17T17:52:32Z
Created

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr