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J/MNRAS/342/802 Chandra survey of 13-h XMM/ROSAT survey (McHardy+, 2003)
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Beginning of ReadMe :J/MNRAS/342/802 Chandra survey of 13-h XMM/ROSAT survey (McHardy+, 2003)
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A medium-deep Chandra and Subaru survey of the 13-h XMM/ROSAT deep survey area.
McHardy I.M., Gunn K.F., Newsam A.M., Mason K.O., Page M.J., Takata T.,
Sekiguchi K., Sasseen T., Cordova F., Jones L.R., Loaring N.
<Mon. Not. R. Astron. Soc. 342, 802 (2003)>
=2003MNRAS.342..802M
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ADC_Keywords: Surveys - X-ray sources
Keywords: surveys - galaxies: clusters: general - quasars: general -
X-rays: diffuse background - X-rays: galaxies
Abstract:
We present the results of a Chandra ACIS-I survey of a high-latitude
region at 13h +38deg which was earlier observed with ROSAT and
which has recently been observed by XMM-Newton for 200ks. XMM-Newton
will provide good-quality X-ray spectra for over 200 sources with
fluxes around the knee of the logN/logS, which are responsible for
the bulk of the X-ray background. The main aim of the Chandra
observations is to provide arcsecond, or better, positions, and hence
reliable identifications, for the XMM-Newton sources. The ACIS-I
observations were arranged in a mosaic of four 30-ks pointings,
covering almost all of the 15-arcmin radius XMM-Newton/ROSAT field. We
detect 214 Chandra sources above a Cash likelihood statistic of 25,
which approximates to 5sigma significance, to a limiting flux of
1.3x10^-15^erg/cm^2^/s (0.5-7keV). Optical counterparts are derived
from a Subaru SuprimeCam image reaching to R 27. The very large
majority of the Chandra sources have an optical counterpart, with the
distribution peaking at 23<R<24, although 14 have no counterpart to
R=27. The fraction of X-ray sources with no identification brighter
than R=27 is similar to that found in deeper Chandra surveys.