BATSE 0.03--1.8 MeV Gamma-Ray Flux and Spectral Monitoring of Centaurus A, NGC 4151, and 3C 273

Details BATSE 0.03--1.8 MeV Gamma-Ray Flux and Spectral Monitoring of Centaurus A, NGC 4151, and 3C 273 BATSE 0.03--1.8 MeV Gamma-Ray Flux and Spectral Monitoring of Centaurus A, NGC 4151, and 3C 273

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.5808w&link_type=abstract

American Astronomical Society, 187th AAS Meeting, #58.08; Bulletin of the American Astronomical Society, Vol. 27, p.1369

Astronomy and Astrophysics

Astronomy

Scientific paper

We report 0.03--1.8 MeV fluxes and spectra of the nearby radio galaxy Centaurus A (NGC 5128), the Seyfert galaxy NGC 4151, and the bright QSO 3C 273, during available \Cgro\ viewing periods from 1991--1994, using earth-occultation data from the Burst and Transient Source Experiment (BATSE). For Cen A, based on 15 viewing periods available initially, the average of the preliminary 45--140 keV fluxes was ~1.4*E(-2) \Gcs, with variability of about a factor of two; the mean flux in the 0.5--1.0 MeV range was about 1.6*E(-3) , with evidence for variability. The spectra obtained during most single viewing periods are adequately represented by power-laws dN/dE = AE(-alpha ) , with photon indices alpha ranging from approximately 1.5 to 2.2.

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