X-ray observations of the supernova remnant MSH 11-54

Details X-ray observations of the supernova remnant MSH 11-54 X-ray observations of the supernova remnant MSH 11-54

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...237l..33a&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 237, Apr. 15, 1980, p. L33-L37.

Astronomy and Astrophysics

Astrophysics

9

Astrophysics, Heao 2, Supernova Remnants, X Ray Sources, Brightness, Energy Spectra

Scientific paper

Soft X-ray observations of the X-ray source H1122-59 in the 0.4-2 keV band made with the low-energy detector 1 of the HEAO A-2 experiment are described. Based on positional coincidence, the source is identified with the supernova remnant MSH-11-54, thus confirming the report of Share et al. (1980). The object is a bright source in the 0.4-2 keV band with an X-ray flux of 9 x 10 to the -11th ergs/sq cm s near the earth. The measured source spectrum implies a plasma temperature of 4 million K and X-ray luminosity in the 0.4-2 keV band of 10 to the 37th ergs/s using a distance of 10 kpc for MSH 11-54. The X-ray observations, interpreted in terms of an adiabatic shock wave model, give a shock velocity of about 560 km/s and a supernova age of about 2300 yr, in good agreement with the age derived from the radio observations.

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