NOAO >   Observing Info >   Approved Programs >   2011A-0373

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Proposal Information for 2011A-0373


PI: Ping Zhao, Harvard-Smithsonian Center for Astrophysics, zhao@cfa.harvard.edu
Address: High Energy Astrophysics Division, 60 Garden St, Cambridge, MA 02138, USA

CoI: Jonathan E. Grindlay, Harvard-Smithsonian Center for Astrophysics
CoI: Jae Sub Hong, Harvard-Smithsonian Center for Astrophysics
CoI: Mathieu Servillat, Harvard-Smithsonian Center for Astrophysics

Title: A new Method to Search for quiescent Low-Mass X-ray Binary

Abstract: We propose to explore a new method in searching for quiescent Low- Mass X-ray Binary (qLMXB) by observing a new candidate qLMXB. The main goal of the ChaMPlane survey is to determine the population density of accretion powered binaries in the Galactic plane. To date, almost all the accretion binaries were found during their X-ray outburst. However, those binaries stay in their quiescent state most of the time. This new candidate qLMXB resembles the black-hole X-ray binary GRO J1655-40, with a subgiant secondary. This proposal aims to determine its qLMXB status. If confirmed, it will not only add one more to the very short list of three dynamically confirmed subgiant qLMXB. But more importantly, it will be the first qLMXB ever discovered in a targeted survey and open a new way to search for accretion binaries hidden in the Galactic plane. This is why we started the ChaMPlane survey. Considering its close proximity with the GRO J1655-40. This study may also help our understanding of the entire qLMXB population in the Galaxy.


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NOAO >   Observing Info >   Approved Programs >   2011A-0373

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