Contribution of intermediate luminosity X-ray galaxies to the background - Anon 0945-30

Details Contribution of intermediate luminosity X-ray galaxies to the background - Anon 0945-30 Contribution of intermediate luminosity X-ray galaxies to the background - Anon 0945-30

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.275..719s&link_type=abstract

Nature, vol. 275, Oct. 26, 1978, p. 719-721.

Astronomy and Astrophysics

Astronomy

38

Line Spectra, Luminous Intensity, Spiral Galaxies, X Ray Sources, Absorption Spectra, Emission Spectra, Forbidden Transitions, H Alpha Line, Heao 1, Intergalactic Media, Sas-3, Spaceborne Astronomy, X Ray Astronomy, X Ray Spectra

Scientific paper

Evidence that the galaxy A0945-30 is a new extragalactic X-ray source was found from an analysis of rotating modulation collimator quick-look data collected from the SAS 3 X-ray observatory. A strong piece of evidence was the hydrogen column density of 3 plus or minus 1 times 10 to the 22nd power per sq cm for a power law spectrum extending to about 35 keV inferred from HEAO 1 data. Observations indicate that the galaxy is an early type spiral with a bright nucleus. A faint star alongside the galaxy within the 90% confidence X-ray source error circle is an F dwarf with no indication of emission features. Spectra of the galaxy in the red and blue show sharp, intermediate strength emission lines of forbidden O III, forbidden N II, and H-alpha together with strong Mg, Fe, Ca absorption features characteristic of a normal stellar continuum in the galactic nucleus.

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