Evidence for emission in the MeV band from GRO J1837+59 and QSO 1739+522
O.R.Williams, K.Bennett, R.Much
V.Schonfelder, W.Collmar, H.Steinle
Emission in the MeV band from the region containing the bright unidentifed
EGRET source GRO J1837+59 and the steep-spectrum EGRET blazar QSO 1739+522
was first reported by COMPTEL during an observation in November 1992.
During this observation the emission was consistent with a single point
source, designated GRO J1753+57. However, the location of GRO J1753+57 was
not consistent with either GRO J1837+59 or QSO 1739+522 and identifying its
counterpart in other wavelengths proved difficult. Moreover, subsequent
observations suggested that the source could not in fact be described as a
single point source and explanantions involving extended or multiple
sources were invoked.
We present an analysis of recent obervations of this region, which confirm
that the emission cannot arise from a single source, but can be modelled as
a combination of emission from both GRO J1837+59 and QSO 1739+522. The
spectrum and time variability derived for these two sources are discussed and
compared to observations in neighbouring bands.
File translated from TEX by TTH, version 2.32.
On 16 Jul 1999, 09:19.