The bright radio flare from microquasar GRS 1915+105

The Astronomer's Telegram, No. 16976

During current long-term monitoring of microquasars we have detected the bright flare from the microquasar GRS1915+105 with the RATAN-600 radio telescope. Firstly source was detected 3 and 6 January 2025 at level 20 mJy at 4.7 GHz after long period of nondetection lower 5 mJy. Today on 13 January 2025 (MJD 60688.373) we have measured the fluxes: 1240 +/- 40, 1805 +/- 30, 1890 +/-30, 1745 +/- 30, 1335 +/- 40, 980 +/-40, and 740 +/-40 mJy at 2.3, 4.7, 8.2, 11.2, 14.4, 22.3 and 30.0 GHz respectively.