EXOSAT observations of the suspected flare star BD + 48 deg 1958A

Details EXOSAT observations of the suspected flare star BD + 48 deg 1958A EXOSAT observations of the suspected flare star BD + 48 deg 1958A

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...365..332r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 365, Dec. 10, 1990, p. 332-335.

Astronomy and Astrophysics

Astronomy

Satellite Observation, Stellar Flares, X Ray Stars, Exosat Satellite, Spacecraft Equipment, X Ray Astronomy

Scientific paper

X-ray observations are reported for the BY Dra variable BD + 48 deg 1958A using the low-energy (LE) and the medium-energy (ME) detectors of Exosat. The star is detected in both the LE and the ME detectors, with some evidence for a long-duration (over 2-hr) X-ray flare. A combined spectral fit to the LE and ME data leads to an X-ray plasma temperature of 1.6 + or - 0.4 keV during the quiescent state and 5.0 + or - 1.4 keV during the flare. The X-ray luminosity in the 0.1-4.0 keV energy band is 2.7 x 10 to the 29th ergs/sec during the quiescent state, and a nearly 20 percent increase in the X-ray flux is detected during the flare.

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