NOAO >   Observing Info >   Approved Programs >   2000B-0036

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Proposal Information for 2000B-0036


PI: Josh Grindlay, CfA, josh@cfa.harvard.edu
Address: 60 Garden St., Cambridge, MA 02138, USA

CoI: Peter Edmonds, CfA
CoI: Jeff McClintock, CfA
CoI: Ping Zhao, CfA
CoI: Mike Garcia, CfA
CoI: Adrienne Cool, San Francisco State University
CoI: Stefanie Wachter, CTIO
CoI: Don Hoard, CTIO
CoI: Paul Green, CfA
CoI: Belinda Wilkes, CfA
CoI: Jeremy Drake, CfA
CoI: Vinay Kashyap, CfA
CoI: Charles Bailyn, Yale Univ.
CoI: Haldan Cohn, Indiana Univ.

Title: ChaMPlane: Measuring the Faint X-ray Binary and Stellar X-ray Content of the Galaxy

Abstract: We propose to conduct the Chandra Multiwavelength Plane (ChaMPlane) Survey to identify a large sample of serendipitous x-ray sources located to arcsec precision in the deep (\gsim30 ksec) galactic fields (b \lsim10\deg) imaged by the Chandra X-ray Observatory. Our primary goal is to identify cataclysmic variables (CVs) and quiescent Low Mass X-ray Binaries (qLMXBs), primarily black hole x-ray novae in quiescence, in order to constrain and ultimately measure the luminosity functions of each. Secondary objectives are to determine the Be x-ray binary content and stellar coronal source distributions in the Galaxy. The deep Chandra galactic fields will detect 2-6 keV fluxes (allowing for low energy absorption) of \Fx(2-6 keV)=2 \X 10^-15 erg/s and thus CVs or qLMXBs with \Lx=10^31 erg/s out to ~7 kpc. Thus most CVs and qLMXBs in the Galaxy can be reached, and the ChaMPlane survey offers the best chance for constraining their formation/evolution and the stellar BH content of the Galaxy. CVs and qLMXBs will be identified by their ubiquitous \Halpha excess as ``blue'' objects in the R vs. (\Halpha - R) plane down to R \about 24. We have demonstrated this technique for crowded fields with our HST discovery of the first CVs in globular cluster cores and have now conducted a successful pilot ChaMPlane survey at CTIO.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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