COMPTEL observations of Cygnus X-1

M. McConnell, A. Connors, D. Forrest, J. Ryan, W. Collmar, R. Diehl, V. Schönfelder, H. Steinle, A. Strong, H. Bloemen, R. van Dijk, W. Hermsen (+3 others)
Gammaray burst studies by COMPTEL during its first year of operation AIP Conf. Proc. 280, 845 (1993); 10.1063/1.44232 Earth occultation measurements of galactic hard Xray/gammaray sources: A survey of BATSE results AIP Conf. ABSTRACT We report on the latest results from an analysis of data on Cygnus X-1 as collected by the COMPTEL experiment on the Compton Gamma-Ray Observatory (CGRO). COMPTEL detected the source around 1 MeV during two separate one-week observations in 1991. The measured flux
more » ... The measured flux levels indicate variability on a time scale of weeks. The results also indicate flux levels which are well below the levels reported by some investigators for an excess of emission in the energy range > 1 MeV.
doi:10.1063/1.44142 fatcat:ihl5yfjthvcqvmki3lotc4rqz4