Nonthermal hard X-ray emission from the nucleus of NGC 1275

Details Nonthermal hard X-ray emission from the nucleus of NGC 1275 Nonthermal hard X-ray emission from the nucleus of NGC 1275

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...243l...9r&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 243, Jan. 1, 1981, p. L9-L12.

Astronomy and Astrophysics

Astronomy

43

Galactic Clusters, Galactic Nuclei, Galactic Radiation, Radio Galaxies, Seyfert Galaxies, X Ray Astronomy, Flux Quantization, Heao 1, Oso-7, Spaceborne Telescopes, Synchrotron Radiation, Very Long Base Interferometry

Scientific paper

Observations confirming the HEAO 1 discovery of a hard X-ray component in the X-ray spectrum of the Perseus cluster are reported. A comparison of the results with 1978 HEAO 1 observations and 1974 balloon limits shows that this component is variable on a time scale of one year. Synchrotron self-Compton models of the compact radio source centered on the nucleus of NGC 1275 predict a substantial secondary X-ray flux based on the observed radio data. While the observed X-ray flux is one-fourth the predicted value, uncertainties in the radio data are sufficient to account for the discrepancy. It is concluded that the hard X-ray flux originates in the active nucleus of the Seyfert galaxy NGC 1275 through the synchrotron self-Compton process.

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