ChaMPlane Survey Results for the Galactic Center
Abstract
The Galactic Center is the dynamic crater of thousands X-ray sources due to its high concentration of CVs, LMXBs and HMXBs. Therefore it's the most intensely studied region of the Chandra Multiwavelength Plane (ChaMPlane) survey. The Chandra X-ray Observatory 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 - 8.0 keV. About 300 of them are detected in soft band (0.5 - 2.0 keV); over 2000 are detected in hard band (2.0 - 8.0 keV). As ChaMPlane survey program, we conducted deep optical (V, R, I and Hα bands) and IR (J, H, K bands) follow-ups to identifying their counterparts, and optical spectroscopic follow-ups on identified counterparts for spectral classification. So far we have found 6 CVs in the Galactic Center region. Combining our optical identification, spectral classification and X-ray quartile analysis (see Hong et al.),
we present the results on the classification, estimated NH and distance of the stellar objects responsible for the detected X-ray emissions towards the Galactic Center.- Publication:
-
American Astronomical Society Meeting Abstracts #213
- Pub Date:
- January 2009
- Bibcode:
- 2009AAS...21330102Z