RATAN-600 multi-frequency measurements of GRS1915+105

The RATAN multi-frequency light curves of GRS1915+105 in May-June 2019

Trushkin S. A., Nizhelskij N. A., Tsybulev P. G., Bursov N. N., Shevchenko A. V.

We continue the monitoring of microquasar GRS 1915+105 at 2.3, 4.8, 8.2, 11.2 and 22.3 GHz with the RATAN-600 radio telescope (see also ATEL #1509, #2899). During 1 April - 11 May 2019 we have detected the source at level less 10 mJy at 4.8 GHz. After 8 May the microquasar entered in very low flux state (Swift/BAT data in ATEL #12743), like the similar state in 2007 (within MJD54300-54550, see the plot in ATel #1509). We restarted the daily observations on 16 May 2019 (MJD 58619) and we have detected GRS1915+105 with fluxes about 100 mJy at 11.2 GHz just after X-ray events detected with Swift/BAT (15-50 keV) and MAXI (2-20 keV). Our data agree with AMI-LA data (ATel #12773). Original →