The very luminous supernova remnant in NGC 6946

Details The very luminous supernova remnant in NGC 6946 The very luminous supernova remnant in NGC 6946

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...424l..99s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 424, no. 2, p. L99-L102

Astronomy and Astrophysics

Astrophysics

33

Bremsstrahlung, Light (Visible Radiation), Spiral Galaxies, Supernova Remnants, X Ray Sources, X Ray Spectra, Angular Resolution, Astronomical Catalogs, Heao 2, Luminosity, Rosat Mission, Spectral Resolution

Scientific paper

In this paper, I discuss an extremely luminous X-ray source found on the northern arm of the nearly face-on spiral galaxy NGC 6946. The source was originally discovered in an Einstein observation, but the poor spatial resolution prevented an accurate identification. Here, Roentgen Satellite (ROSAT) data provide a position to approximately 5 sec - 10 sec. The spectrum is rather soft, and moderately absorbed. The source appears to be local to NGC 6946 and a supernova remnant, based upon the positional coincidence with an optical counterpart. The luminosity, assuming a distance to NGC 6946 of 5.1 Mpc, is 2.8 x 1039 erg/s, among the highest known X-ray luminosities of a remnant. The optical counterpart is at least 100 years old.

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