X-rays binary Cyg X-3

Cygnus X-3 is the generator of electromarnetic emission from radiowaves to Gamma-rays of high energies

The close X-ray binary with relativisic jest, contained probably a black hole, Cygnus X-3 has been detected in first time in Gamma-rays at enegries higher 100 МeV (AGILE, Tavani et al., Nature, 2009) during the intense radio flares, monitored with RATAN-600 radio telecope. Thus in the first time such high energy radiation was detected from the galactic binary star, located on 30000 light years from Sun. Measurements in 2009-2010 period confirmed this discovery [Fig.3]) Un to now such HE gamma-emission has been detected only from the active galactic nuclei -- extra-galactic objects with supoer-massive black holes -- quasars and blasars. The bright radio flares from Cygnus X-3, caused by the massive ejections of matter with velocity close to speed of light accur in the certain ''huper-sort'' X-ray states (RXTE PCA), that was in the first time determined in the studies of HID -- ''hardness-intensity diagram'' [Fig.4].

Tavani M., et al., ... Trushkin S., Nizhelski N. ... 2009, Extreme particle acceleration in the microquasar Cygnus X-3 Nature, 462, 620-623
Koljonen K.I.I.; Hannikainen D.C.; McCollough M.L.; Pooley G.G.; Trushkin, S.A. The hardness-intensity diagram of Cygnus X-3: revisiting the radio/X-ray states 2010, MNRAS, 406, 307-319.
Bulgarelli, ... Trushkin, N. A. Nizhelskij,... AGILE detection of Cygnus X-3 gamma-ray active states during the mid-2009/mid-2010 period Astronomy and Astrophysics, 2011 (submitted)

Рис.1. Radio map suround the Cygnus X-3

Рис.2. X-ray image of Cygnus X-3 (Chandra)

Рис.3. Light curves Cygnus X-3 in gamma-rays (AGILE) and in radio cm-bands (Ryle tel., RATAN-600 and Mestahovi).

Рис.4. ''hardness-intensity diagram'', plotted for 137 pointing PCA data of the RXTE observatory. In the top -- 6 X-ray spectra, determing the six different X-ray states. Below HID -- the each X-ray point have color, corresponded to the radio flux densities scale, given in right part.