Three New Galactic Center X-ray Sources Identified with Near-Infrared
  Spectroscopy
  We have conducted a near-infrared spectroscopic survey of 47 candidate
counterparts to X-ray sources discovered by the Chandra X-ray Observatory near
the Galactic Center (GC). Though a significant number of these astrometric
matches are likely to be spurious, we sought out spectral characteristics of
active stars and interacting binaries, such as hot, massive spectral types or
emission lines in order to corroborate the X-ray activity and certify the
authenticity of the match. We present three new spectroscopic identifications,
including a Be high mass X-ray binary (HMXB) or a gamma Cassiopeiae (Cas)
system, a symbiotic X-ray binary and an O-type star of unknown luminosity
class. The Be HMXB/gamma Cas system and the symbiotic X-ray binary are the
first of their classes to be spectroscopically identified in the GC region.
