The extreme Seyfert galaxy associated with the X-ray source 3A 0557-383

Details The extreme Seyfert galaxy associated with the X-ray source 3A 0557-383 The extreme Seyfert galaxy associated with the X-ray source 3A 0557-383

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.198p..13f&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 198, Mar. 1982, p. 13P-17P. Research supported by the Science and Engin

Astronomy and Astrophysics

Astronomy

15

Galactic Structure, Seyfert Galaxies, X Ray Astronomy, X Ray Sources, Ariel 5 Satellite, Astronomical Spectroscopy, Emission Spectra, H Alpha Line, Interstellar Extinction, Light (Visible Radiation), Luminosity

Scientific paper

A Seyfert galaxy at 1950: 5h56m21s, -38 deg 20 arcmin 15 arcsec with a velocity of recession 10,000 km/s is identified with the X-ray source 3A 0557-383. The optical spectrum is very heavily reddened, so that the absolute magnitude, if corrected for extinction, reveals this to be one of the most luminous Seyferts known. It shows a very high mean X-ray luminosity of 10 to the 3.72 W (2-10 keV) and is believed to be variable.

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