Hard X-ray Emission from NGC 7469

Details Hard X-ray Emission from NGC 7469 Hard X-ray Emission from NGC 7469

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...18510809c&link_type=abstract

American Astronomical Society, 185th AAS Meeting, #108.09; Bulletin of the American Astronomical Society, Vol. 26, p.1501

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Scientific paper

Compton Observatory OSSE observations of the Seyfert 1 galaxy NGC 7469 show hard X-ray emission at energies below 250 keV, with a steep spectrum compatible with an exponential cutoff of about 50 keV or a power law with a photon index steeper than --2, similar to that seen in other Seyfert galaxies. We present the OSSE data, in combination with other available X-ray data, and compare the time-averaged broadband X-ray spectrum to various proposed models for X-ray and gamma ray emission from AGN. Weak limits are obtained for the hard X-ray variability of NGC 7469 in the 4 weeks of OSSE observations during March--August 1994. These limits are compared to variability measured at other energies.

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