Observations of the Microquasar GRS1915+105 with the USA Experiment on ARGOS
Abstract
Since its discovery in 1992, the superluminal X-ray transient GRS1915+105 has been extensively observed in an attempt to understand its behaviour. We present first results from a long-term monitoring campaign of GRS1915+105 undertaken with the USA X-ray timing experiment on the ARGOS satellite in 1999 and 2000. To date, we have obtained approximately 240 ksec of data on this Galactic black hole candidate. A variety of behaviour has been observed, including low, steady X-ray emission, rapid irregular 10-second flaring, extended intervals of quasi-periodic flaring on a timescale of approximately 60 seconds, and short intervals of "quenching" of the X-ray emission. We also combine our data with simultaneous X-ray data from the RXTE ASM and radio data from GBI and the Ryle Telescope to examine the relationship between the X-ray and radio emission during the various types of X-ray behaviour observed.
- Publication:
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AAS/High Energy Astrophysics Division #5
- Pub Date:
- October 2000
- Bibcode:
- 2000HEAD....5.3103B