ChaMPlane Survey Results Towards the Galactic Center

Details ChaMPlane Survey Results Towards the Galactic Center ChaMPlane Survey Results Towards the Galactic Center

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.1306z&link_type=abstract

American Astronomical Society, HEAD meeting #12, #13.06

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the Chandra Multi-wavelength Plane Survey (ChaMPlane) results towards the Galactic center. ChaMPlane is designed to survey the point X-ray sources discovered by the Chandra X-ray Observatory in the galactic plane in order to constrain the X-ray binary population in the Galaxy. This multi-wavelength survey includes the data from the Chandra archive, as well as the optical and infrared images and spectroscopy. The Galactic Center is the dynamic center of thousands X-ray sources due to its high concentration of CVs, LMXBs and HMXBs. Therefore it is the most intensely studied region of the ChaMPlane survey. Analysis of a partial set of the all the Chandra deep observations (14 obsids with a total 750ks exposure time) with ACIS-I revealed 2876 X-ray point sources within 8 arcmin of SgrA* in energy band 0.3-8.0keV. About 300 of them are detected in soft band (0.5-2.0keV) and so are in the foreground (distance < 3kpc); over 2000 are detected in hard band (2.0-8.0keV). So far we have found optical counterparts for 6 CVs in the Galactic Center foreground region. Combining our optical and nIR identification, spectral classification and X-ray quantile analysis we present the results on the classification, estimated NH and distance of the stellar objects responsible for the detected X-ray sources in the foreground of the Galactic Center region.

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