Ginga observations of a long-duration X-ray flare in the Algol systemAlgol was observed by the Ginga X-ray satellite for about 2 days in January 1989, including both the primary and most of the secondary optical eclipses. No evidence for X-ray eclipses was seen. A large flare lasting over 12 h was detected prior to and during secondary eclipse. The flare began with a peak temperature of about 69 MK, gradually decaying to about 36 MK. Variable Fe line emission at 6.7 keV ws observed. The Fe line equivalent width is in clear disagreement with theoretical predictions for an optically thin plasma.
Document ID
19910060287
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Stern, R. A. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Haisch, B. M. (Lockheed Research Laboratories Palo Alto, CA, United States)
Nagase, F. (Institute of Space and Astronautical Science Sagamihara, Japan)
Uchida, Y. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)