Abstract
view Abstract Citations References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS EXOSAT Observations of the Suspected Flare Star BD +48 degrees 1958A Rao, A. R. ; Singh, K. P. ; Vahia, M. N. Abstract 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. Publication: The Astrophysical Journal Pub Date: December 1990 DOI: 10.1086/169487 Bibcode: 1990ApJ...365..332R Keywords: Satellite Observation; Stellar Flares; X Ray Stars; Exosat Satellite; Spacecraft Equipment; X Ray Astronomy; Astrophysics; STARS: FLARE; STARS: INDIVIDUAL ALPHANUMERIC: BD; 48 DEGREES 1958A; STARS: X-RAYS full text sources ADS | data products SIMBAD (1)
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