Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...235..377m&link_type=abstract
Astrophysical Journal, Part 1, vol. 235, Jan. 15, 1980, p. 377-385.
Astronomy and Astrophysics
Astrophysics
182
Heao 1, Seyfert Galaxies, X Ray Spectra, Bremsstrahlung, Heao 2, Luminosity
Scientific paper
The paper presents the 2-50-keV X-ray spectra and time variability information on seven Seyfert 1 galaxies NGC 3783, NGC 4151, NGC 5548, NGC 6814, MK 509, MCG 8-11-11, and ESO 141-G55, obtained with the A2(2) experiment on HEAO 1. It is concluded that the spectra of Seyfert 1 galaxies can be well represented by flat power laws of high-temperature thermal breamsstrahlung models with relatively low column densities.
Boldt Elihu A.
Holt Stephen S.
Marshall Francis E.
Mushotzky Richard F.
Serlemitsos Peter J.
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