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A third bright radio flare of SS433 during 2016

ATel #9481; S. A. Trushkin, N. A. Nizhelskij, P. G. Tsybulev, G. V. Zhekanis (SAO RAS, Russia)
on 9 Sep 2016; 19:08 UT
Credential Certification: Sergei Trushkin (satr@sao.ru)

Subjects: Radio, Millimeter, X-ray, Binary, Black Hole

During this year we have detected three powerful radio flares from SS433 with the RATAN-600 radio telescope. The last one began on 05 September (MJD57636.72) and reached 1 Jy at 4.8 GHz and 0.6 Jy at 11.2 GHz on 9 September (MJD57640.72). For reliability we have measured the fluxes using the two antenna: Northern Sector and Southern Sector with flat mirror of the RATAN and two sensitive radiometric systems (2.3, 4.6, 8.2, 11.2 and 21.7 GHz; 4.8, 11.2 and 21.7 GHz). The both measurements are in good agreement. The spectral index evolved from -0.3 to -0.6 from beginning to last measurements respectively. During 2-3 days before the beginnings of the all three flares the fluxes decreased from the local quiet levels at all frequencies. Such behavior reminds the state of other microquasar Cyg X-3 before the powerful flares (ATel #9416).

The RATAN multi-frequency light curves of SS433 in May-September 2016