Two transient X-ray sources observed with the WATCH experiment

Details Two transient X-ray sources observed with the WATCH experiment Two transient X-ray sources observed with the WATCH experiment

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as...97..257b&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 97, no. 1, p. 257-260.

Astronomy and Astrophysics

Astronomy

4

Pulsars, Stellar Flares, X Ray Binaries, Energy Spectra, Light Curve, Power Spectra, Sky Surveys (Astronomy), Spaceborne Astronomy

Scientific paper

We report the detection of an X-ray flare from the low mass X-ray binary 4U 0614 + 09 by the WATCH all-sky X-ray monitor in January 1990. The flare reached a peak flux of 10 Crab units in the 6-20 keV energy band and had the time structure of a Type-I X-ray burst. A similar flare attributed to this source was reported by OSO-8 in 1975. The burst is used to estimate the maximum distance to 4U 0614 + 09. This source was observed in recurrence in late January 1992 by the WATCH all-sky X-ray monitor on GRANAT. The distinction from the nearby X-ray source Cen X-3 was established by the detection of pulsations in the X-ray signal with a period of 406.34 s +/- 0.12 s, and by the absence of the eclipses characteristic of the Cen X-3 system.

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