Giant radio flare from GRS1915+105
ATel #15974; S. A. Trushkin, N. A. Nizhelskij, P. G. Tsybulev, A. V. Shevchenko (SAO RAS, Russia)
on 3 Apr 2023; 09:54 UT
Credential Certification: Sergei Trushkin (satr@sao.ru)
Subjects: Radio, Infra-Red, X-ray, Binary, Black Hole
Second for two weeks the bright X-ray flare from the microquasar GRS1915+105, detected with the Swift/BAT at 15-50 keV (the monitoring data is available at https://swift.gsfc.nasa.gov/results/transients/GRS1915p105) on 31 March 2023 = MJD 60034.6761) and with the MAXI/GSC (http://maxi.riken.jp/star_data/J1915+109/J1915+109.html), beginning of which was reported by Yamada et al. (ATel #15968).
As before in the daily monitoring of microquasars with the RATAN-600 radio telescope we have detected associated flare from GRS 1915+105: 400 +/- 30, 1110 +/- 20, 1650 +/- 20, 1810 +/-20 and 2015 +/- 30
at 2.3, 4.7, 8.2, 11.2 and 21.7 GHz respectively on 3 April 2023 (MJD 60037.156),e.i. ~2.5d after the X-ray flare. This flare was extremely bright one. See the updated plot of light curves in our previous ATel #15964 and the radio spectra during last three days below.
The following multi-band observations can be are very useful.
Radio spectra evolution of the GRS1915+105 during 1-3 April 2023
