CGRO-COMPTEL observations of the Centaurus A region
The sky region containing the active radio-galaxy Centaurus A has repeatedly been observed with the COMPTEL instrument onboard the Compton Gamma Ray Observatory (CGRO). The nine observation periods during the CGRO phases I and II in which Cen A was in the field of view of COMPTEL are spread over 18 months in the years 1991 to 1993. The energy range 0.75 to 30 MeV is covered.
Clear evidence for a source with emission up to several MeV is seen from a region coinciding with the position of Cen A. The spectra change significantly over ∼ 6 months between the two observation phases. A possible source confusion with the nearby gamma-ray source MS1312.1-4221 is discussed.
Advances in Space Research
Digital Object Identifier (DOI)
H. Steinle, K. Bennett, H. Bloemen, W. Collmar, R. Diehl, W. Hermsen, G. Lichti, M. McConnell, D. Morris, R. Much, J. Ryan, V. Schönfelder, A. . Strong, M. Varendorff, and C. Winkler, ‘CGRO-COMPTEL observations of the Centaurus A region’, Advances in Space Research, vol. 15, no. 5, pp. 37–40, May 1995.