Astronomy and Astrophysics – Astronomy
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.1402g&link_type=abstract
American Astronomical Society, AAS Meeting #212, #14.02; Bulletin of the American Astronomical Society, Vol. 40, p.207
Astronomy and Astrophysics
Astronomy
Scientific paper
We present here the search for low mass X-ray binaries in quiescence (qLMXBs) in the globular cluster NGC 6304 using XMM-Newton observations. The spectral analysis led to the identification of three candidate qLMXBs within the field of this globular cluster (GC), each consistent with the X-ray spectral properties of previously identified qLMXBs. One is located within one core radius (rc) of the center of NGC 6304. A second one is found well outside the optical core (at 32 rc) but still within the tidal radius. From spatial coincidence, we identify a bright 2MASS infrared counterpart. We also identify a third, low signal-to-noise candidate with a 2MASS counterpart. Three qLMXBs from this GC is a number marginally consistent with that expected from the structural properties of NGC 6304. We also report a unusually hard power-law index (α=-2.21.5-∞).
Bildsten Lars
Brown Edward
Guillot Sebastien
Pavlov George G.
Rutledge Robert E.
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