An X-Ray Flare in M82 Observed with RXTE

Details An X-Ray Flare in M82 Observed with RXTE An X-Ray Flare in M82 Observed with RXTE

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.2407g&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #24.07; Bulletin of the American Astronomical Society, Vol. 31, p.863

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Scientific paper

The nearby starburst galaxies M82 and NGC253 were monitored by RXTE during 1966 in a series of 30 observations each. The observation plan was designed to detect variability on all time scales up to 10 months. The >2.5 keV x-ray emission from NGC253 showed some significant variability from its average value of 1 mCrab, but no marked changes. The flux from M82, on the other hand, was fairly steady for the first 7 months at an average of 4 mCrab, but then doubled to 8 mCrab within three weeks, and stayed more or less at the new level. Spectra from both objects and at all times were thermal rather than power-law, and the temperature of the flaring component in M82 was lower by 25% than the previous emission. If at M82, the flare luminosity is several times 10(40) , which may indicate origin in a compact object of mass greater than a few Msun.

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