2 YEARS OF OBSERVATION OF THE X-RAY PULSAR VELA X-1 WITH THE WATCH INSTRUMENT ON THE GRANAT OBSERVATORY

2 YEARS OF OBSERVATION OF THE X-RAY PULSAR VELA X-1 WITH THE WATCH INSTRUMENT ON THE GRANAT OBSERVATORY

We present the results from a study of the x-ray pulsar Vela X-1 using the Watch instrument on the Granat Observatory between January 1990 and September 1991. We have found a rotation period for the pulsar of 283.3 seconds. This is the longest period seen since observations of the system began. Ligh...

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Veröffentlicht in:Soviet astronomy letters 1992-01, Vol.18 (1), p.16-19
Hauptverfasser: LAPSHOV, IY, SYUNYAEV, RA, CHICHKOV, MA, DREMIN, VV, BRANDT, S, LUND, N
Format: Artikel
Sprache:eng
Schlagworte:
Astronomy & Astrophysics
Physical Sciences
Science & Technology
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Zusammenfassung:We present the results from a study of the x-ray pulsar Vela X-1 using the Watch instrument on the Granat Observatory between January 1990 and September 1991. We have found a rotation period for the pulsar of 283.3 seconds. This is the longest period seen since observations of the system began. Light curves of this source indicate that there are strong outbursts of x-ray emission lasting several hours. On 9-10 January 1991, the Watch instrument discovered that the source was turned off for more than 10 hours. This turn-off started two days prior to the regular eclipse.
ISSN:0360-0327