X-ray upper limits from the M82 optical transient

Details X-ray upper limits from the M82 optical transient X-ray upper limits from the M82 optical transient

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atel.1503....1m&link_type=abstract

The Astronomer's Telegram, #1503

Astronomy and Astrophysics

Astronomy

2

Radio, Optical, X-Ray, Globular Clusters, Novae, Transients

Scientific paper

Swift observed the recent optical transient (ATel #1501) in M82 for 4900 sec and made no detection of X-rays from the source. The upper limit corresponds to approximately 2*10^-3 cts/sec (99% confidence level), which corresponds to a .1-10 keV X-ray luminosity of 1.5 * 10^38 ergs/sec for a 1 keV blackbody spectrum or for a Gamma=1.7 power law, assuming the foreground absoprtion of 5*10^20 cm^-3.

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