A giant radio flare from SS433
ATel #4484; S. A. Trushkin, N. A. Nizhelskij, P. G. Tsybulev (SAO RAS)
on 15 Oct 2012; 06:02 UT
Credential Certification: Sergei Trushkin (satr@sao.ru)
Subjects: Radio, Millimeter, Infra-Red, Optical, X-ray, Request for Observations, Binary, Black Hole
In current monitoring program of microquasars with the RATAN-600 radio
telescope supported by RFBR we have detected the extremely strong flaring state from the
well known X-ray binary SS433. 14 October (MJD56214.62) the flux at 4.8 GHz reached the value almost 1.8 Jy and the total spectrum is well fitted by a power law:
S_nu[Jy]=7.0nu^(-0.85)[GHz]. Such giant flares are very rare in
the history of studies of SS433. Usually the quiet spectrum is fitted S_nu[Jy]=1.1nu^(-0.6)[GHz].
Before the radio maximum or in the beginning of the radio flare (MJD56205.45) Swift/BAT has detected the very bright flux of 0.07+-0.06 counts/cm^2/sec at 15-50 keV. This active radio state continues during last 75 days with some bright events. The daily measured light curves at 4.8,
7.7, 11.2 and 21.7 GHz during from July to October 2012 are shown in the plot:
Light curves of SS433 in July-October 2012
