MAXI/GSC detection of a very bright X-ray flare from Algol
Abstract
MAXI/GSC detected a large X-ray flare from Algol at 2018-07-04 05:52 (UT) with a flux of about 300 mCrab. The spectrum can be fitted by an APEC thermal plasma model with a temperature kT > 5.5 keV. Assuming a kT of 10 keV, the estimated flux in 2 - 20 keV band is 7.0 (-1.3, +1.4) x 10-9 ergs/cm2/s (90% CL). Assuming a distance of 28.5 pc, the luminosity reached 6.8 (-1.2, +1.4) x 1032 erg/s (90% CL). This is the largest flare from Algol observed by MAXI in 8 years.
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- July 2018
- Bibcode:
- 2018ATel11812....1I
- Keywords:
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- Binary;
- Star