Recent Radio Monitoring of Microquasars with RATAN-600 Radio Telescope

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dc.creatorTrushkin, S. A.
dc.creatorBursov, N. N.
dc.creatorKotani, T.
dc.creatorNizhelskij, N. A.
dc.creatorNamiki, M.
dc.creatorTsuboi, M.
dc.creatorVoitsik, P. A.
dc.date2007-02-14
dc.date.accessioned2026-07-07T07:46:58Z
dc.date.available2026-07-07T07:46:58Z
dc.descriptionWe report about the multi-frequency (1-30 GHz) daily monitoring of the radio flux variability of the three microquasars: SS433, GRS1915+105 and Cyg X-3 during the period from September 2005 to May 2006. 1. We detected clear correlation of the flaring radio fluxes and X-rays 'spikes' at 2-12 keV emission detected in RXTE ASM from GRS1915+105 during eight relatively bright (200-600 mJy) radio flares in October 2005. The 1-22 GHz spectra of these flares in maximum were optically thick at frequencies lower 2.3 GHz and optically thin at the higher frequencies. During the radio flares the spectra of the X-ray spikes become softer than those of the quiescent phase. Thus these data indicated the transitions from very high/hard states to high/soft ones during which massive ejections are probably happened. These ejections are visible as the detected radio flares. 2. After of the quiescent radio emission we have detected a drop down of the fluxes (~20 mJy) from Cyg X-3. That is a sign of the following bright flare. Indeed such a 1Jy-flare was detected on 3 February 2006 after 18 days of the quenched radio emission. The daily spectra of the flare in the maximum was flat from 1 to 100 GHz, using the quasi-simultaneous observations at 109 GHz with RT45m telescope and millimeter array (NMA) of Nobeyama Radio Observatory in Japan. The several bright radio flaring events (1-10 Jy) followed during this state of very variable and intensive 1-12 keV X-ray emission (~0.5 Crab), which being monitored in RXTE ASM program.
dc.description4 pages, 7 figures. Accepted for publication in the proceedings of the 6th INTEGRAL workshop "The Obscured Universe" (3-7 July 2006, Moscow), ESA SP-622
dc.identifierhttps://arxiv.org/abs/astro-ph/0702393
dc.identifierhttp://arxiv.org/abs/astro-ph/0702393
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/124006
dc.subjectAstrophysics
dc.titleRecent Radio Monitoring of Microquasars with RATAN-600 Radio Telescope
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