Compton gamma-ray observatory observations of the nearest active galaxy Centaurus A

Details Compton gamma-ray observatory observations of the nearest active galaxy Centaurus A Compton gamma-ray observatory observations of the nearest active galaxy Centaurus A

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..410.1298s&link_type=abstract

The fourth compton symposium. AIP Conference Proceedings, Volume 410, pp. 1298-1302 (1997).

Computer Science

Active And Peculiar Galaxies And Related Systems, Magnitudes And Colors, Luminosities, Gamma-Ray, X-Ray

Scientific paper

During the CGRO observations in the years 1991 to 1995, the region on the sky including the active radio galaxy Centaurus A, was in the wide field-of-view of COMPTEL and EGRET in 15 pointings of various durations. During some of these pointings, also OSSE made simultaneous observations of Cen A. BATSE, the fourth instrument on CGRO, continuously monitors this source. The analysis of the COMPTEL data obtained during these 15 pointings shows emission consistent with the position of Cen A, and spectra in two different emission states have been measured. The COMPTEL spectra in the energy range 0.75-30 MeV are consistent with the published Centaurus A spectra in the energy range 0.05-4 MeV from the OSSE instrument. For the higher emission state, a moderate steepening of the spectrum above 30 MeV is required to fit the EGRET data point. Thus, a spectrum of Cen A over 4 decades of energy is available for theoretical interpretation.

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