Monitoring the Gamma-Ray Source 2CG 135+1 and the Radio Star LSI+61 303
M. Tavani, W. Hermsen, R. van Dijk, M. Strickman, S. N. Zhang, R. S. Foster, P. S. Ray, J. R. Mattox, M. Ulmer, W. Purcell, M. Coe
Abstract
We report the results of a CGRO multi-instrument series of observations of the unidentified gamma-ray source 2CG 135+1 and of its possible counterpart, the peculiar radio source GT 0236+610 coincident with the Be star LSI+61 303. We monitored the time variable radio source GT 0236+610 during the CGRO observations. OSSE and COMPTEL data were obtained during the period May-June 1994, and BATSE data for the period April 1994-January 1995. We discuss the time variability of the gamma-ray emission and spectral properties of 2CG~135+1. Understanding the nature of 2CG 135+1 may be of crucial importance for the interpretation of a class of unidentified time variable gamma-ray sources in the Galaxy.
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