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In the process of multifrequency monitoring of the radio emission of the "superlight" microquasar GRS1915+105 carried out with RATAN-600 in October-November 2005 powerful flare activity of relativistic jet ejections was recorded in a wide range of frequencies, from 1 to 12GHz. The radio luminosity of this synchrotron source increased by a factor of 100 comparing to its quiescent level. A correlation of six individual radio flares and six short (< 1 day) powerful, at the level of ~2 Crab, soft X-ray flares in a range of 2-12 keV from the RXTE data was recorded. Such a correlation of the events with a time shift of 24 hours suggests close connection of physical processes in an accretion disk near a black hole and massive ejections of matter manifesting themselves in far regions of radio jets.

Orbital period of an X-ray transient source in the system CI Cam.
For the first time, the orbital motion of a compact component of the X-ray transient CI Cam has been found, the orbital period (19.41 days) and eccentricity (0.62) have been determined, masses of stars of the system have been estimated. The compact component of the system is most likely to be a white dwarf.

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Last update: 16/08/2012