Long-term multi-frequency monitoring of microquasars
arXiv:0810.3376
Abstract
We discuss the results of the radio studies of the X-ray binaries with relativistic jets. We carried out a multi-frequency (1-30 GHz) daily monitoring of the radio flux variability of the microquasars SS433, GRS1915+105, and Cyg X-3 with the RATAN-600 radio telescope during the recent sets from 1 November 2006 to 31 August 2008. From December 2005 radio emission of Cyg X-3 after four years relatively quiescent levels (100-200 mJy) dropped down to 20 mJy, and then we detected a lot of bright radio flaring events (1-20 Jy) followed the very variable (from 0 to 0.5 crabs) 15-50 keV X-ray emission, which was monitored in the Swift/BAT ASM program. Again from December 2007 to March 2008 we have daily measured almost quiescent fluxes from Cyg X-3 but in April 2008 a bright radio flare with clear synchrotron self-absorption was detected. We detected several bright short-term flares from GRS 1915+105 which could be associated with active soft X-ray events. In intense measurements of SS433 fluxes (often mutually with X-ray and optical observations) we detected massive ejections during powerful flares. We discuss the various spectral and temporal characteristics of the light curves from the microquasars. Monitoring of the flaring radio emission is a good tracer of jet activity X-ray binaries.
arXiv comment10 pages, 15 figures, contributed talk at the 7th Microquasar Workshop, Foca, Turkey, Sept. 1-5, 2008, to be published in the Proceedings of Science (MQW7)032
References in corpus (5)
- First Results from the All-Sky Monitor on the Rossi X-ray Timing Explorer
- Synchrotron flaring behaviour of CygnusX-3 during the February-March 1994 and September 2001 outbursts
- A Massive Jet Ejection Event from the Microquasar SS 433 Accompanying Rapid X-Ray Variability
- The 2006 Radio Outburst of a Microquasar Cyg X-3: Observation and Data
- X-ray Observation of SS 433 with RXTE