Astronomy and Astrophysics – Astronomy
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..15...37s&link_type=abstract
Advances in Space Research (ISSN 0273-1177), vol. 15, no. 5, p. (5)37-(5)40
Astronomy and Astrophysics
Astronomy
2
Emission Spectra, Gamma Ray Astronomy, Gamma Ray Spectra, Radio Galaxies, Spectral Emission, Astronomical Spectroscopy, Bl Lacertae Objects, Centaurus Constellation, Flux Density, Gamma Ray Observatory
Scientific paper
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 approximately 6 months between the two observation phases. A possible source confusion with the nearby gamma-ray source MS1312.1-4221 is discussed.
Bennett Kevin
Bloemen Hans
Collmar Werner
Diehl Roland
Hermsen Willem
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