Open AccessX‐Ray Processing of ChaMPlane Fields: Methods and Initial Results for Selected Anti–Galactic Center Fields
Author(s) -
J. Hong,
M. van den Berg,
E. M. Schlegel,
J. E. Grindlay,
X. Koenig,
S. Laycock,
Ping Zhao
Publication year - 2005
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/496966
Subject(s) - galactic center , galactic plane , physics , astrophysics , astrometry , photometry (optics) , galaxy , astronomy , bulge , center (category theory) , stars , chemistry , crystallography
We describe the X-ray analysis procedure of the on-going ChandraMultiwavelength Plane (ChaMPlane) survey and report the initial results fromthe analysis of 15 selected anti-Galactic center observations (90 deg < l < 270deg). We describe the X-ray analysis procedures for ChaMPlane usingcustom-developed analysis tools appropriate for Galactic sources but also ofgeneral use: optimum photometry in crowded fields using advanced techniques foroverlapping sources, rigorous astrometry and 95% error circles for combiningX-ray images or matching to optical/IR images, and application of quantileanalysis for spectral analysis of faint sources. We apply these techniques to15 anti-Galactic center observations (of 14 distinct fields) in which we havedetected 921 X-ray point sources. We present logN-logS distributions andquantile analysis to show that in the hard band (2 - 8 keV) active galacticnuclei dominate the sources. Complete analysis of all ChaMPlane anti-Galacticcenter fields will be given in a subsequent paper, followed by papers onsources in the Galactic center and Bulge regions.Comment: 13 pages, 5 figures, 8 tables, accepted in ApJ for publicatio
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