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A very bright radio flare of SS433

ATEL # 2812; S. A. Trushkin and N.N. Nizhelskij (SAO RAS)
on 24 Aug 2010; 14:24 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: Sergei Trushkin (

Subjects: Radio, Millimeter, Infra-Red, Optical, X-ray, Request for Observations, Binaries, Black Holes, Transients

The famous high-mass X-ray binary, SS433 is in the very intense radio flaring state during the last two weeks. 23 August 2010 (MJD 55432.76) in the monitoring program with the RATAN-600 radio telescope (SAO RAS) we detected the highest fluxes at 2.1, 4.8, 7.7 11.2 and 22 GHz, and the spectrum can be well fitted by the power law spectrum: S_nu[Jy]=4.4nu^(-0.8)[GHz]. Such intensive event is relatively rare (see also, ATEL #1819) and by almost three times higher than a quiet radio state of SS433 (marked in the plot). We will continue to monitor the source daily.
Light curves of SS433 during July-August 2010:
The radio spectrum SS433 in 23 Aug 2010:

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