Detection of an X-ray flare in the RS CVn binary Sigma Corona Borealis

Details Detection of an X-ray flare in the RS CVn binary Sigma Corona Borealis Detection of an X-ray flare in the RS CVn binary Sigma Corona Borealis

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icrc....1....7a&link_type=abstract

IN: International Cosmic Ray Conference, 18th, Bangalore, India, August 22-September 3, 1983, Conference Papers. Volume 1 (A85-2

Astronomy and Astrophysics

Astronomy

Binary Stars, Spaceborne Astronomy, Stellar Coronas, Stellar Flares, X Ray Sources, Energy Spectra, Heao 2, Proportional Counters

Scientific paper

The first observation of a time-resolved X-ray flare in an RS CVn binary is reported. The X-ray flare was detected from the RS CVn binary Sigma CrB on August 17, 1980 during the course of a long pointed-mode observation with the Monitor Proportional Counter on the Einstein Observatory. The flare commenced at about 11:12 UT and lasted for about 205 minutes. During the flare the count rate increased by a factor of five from a quiescent state value of 0.3 count/s to a peak value of 1.5 count/s in the 1.2-10.2-keV energy band. The source spectrum during the flare was found to be considerably harder than that observed in the quiescent state. Details of the various characteristics of the X-ray flare are described.

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