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The low mass X-ray binary X2127+119 in M15
Zach Ioannou (Keele)
The low-mass X-ray binary X2127+119 is one of the few LMXB systems to
be associated with a globular cluster. I present X-ray observations of
the system taken in 1995 with ASCA and 1996 with RXTE. Also, we have
de-archived and re-analysed the MPC1 data from the GINGA observations
in 1988. The total energy range covered by the observations is 0.7 -
18.0 keV. These observations further strengthen the case that the
X-ray emission from X2127+119 originates in an ``Accretion Disc
Corona'' (ADC). The accretion disc is seen to have a rather
complicated disc structure, especially the accretion disc bulge. There
is little evidence of photoelectric absorption during the main
eclipse. Simple spectral fits such as power laws, black-bodies and
bremmstrahlung models are inadequate to fit the data, especially
during the main eclipse or during the secondary dip.
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