A giant radio flare from SS433 again
ATel #11989; S. A. Trushkin, N. A. Nizhelskij, P. G. Tsybulev, A. Erkenov (SAO RAS, Russia)
on 25 Aug 2018; 21:38 UT
Credential Certification: Sergei Trushkin (satr@sao.ru)
Subjects: Radio, Optical, X-ray, Binary, Black Hole, Transient
In long-term monitoring program of microquasars with the RATAN-600 radio telescope we have detected the bright flare from the well known X-ray binary SS433. On 25 August (MJD 58355.76) the flux at 2.3 GHz reached a level of 3.2 Jy and the total spectrum is well fitted by the power law: S_nu[Jy]=6.4nu^(-0.81)[GHz] at frequencies higher 2.3 GHz, almost the same spectrum as we have detected in October 2012 (ATel #4484). In the light curves of
Swift/BAT and
MAXI
we can see the obvious signs of activity. It is interesting that during last 70 days there were three powerful flaring events in SS433 (the link on the RATAN light curves are given in ATel #11870). Second one consisted of two radio peaks, first one was associated with the bright optical outburst by Goranskij et al. (ATel #11870), the second radio peak was observed in follow-up observations with Swift/XRT by Khabibullin et al. (ATel #11975). We continue observations, possibly SS433 will brighten, additional multi-wavelength observations are encouraged.
The RATAN spectrum of SS433 on 25 August 2018
