X-Ray Observations of a New Rich Galactic Globular Cluster

Physics

Scientific paper

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Chandra Proposal Id #07400336

Scientific paper

We propose a 50-ksec ACIS-S imaging observation of a star cluster, ``GLIMPSE-C01'', that was recently co-discovered with the Spitzer Space Observatory during the Galactic Legacy Infrared Mid Plane Survey (Kobulnicky et al. 2005). This heavily obscured object lies directly in the Galactic plane at the relatively close distance of 3-5 kpc. The estimated mass ( 3 x 10^5 Msun) and half-light diameter ( 1-2 pc) make it likely that it is a rich Galactic globular cluster like those already known to contain many detectable X-ray sources including LMXBs, CVs, millisecond radio pulsars, and chromospherically active main-sequence binaries. A relatively short observation will allow us to take a census of the X-ray emitting objects in this cluster (with Lx > 10^{31} ergs/sec).

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