TITLE: GCN CIRCULAR NUMBER: 32474 SUBJECT: IceCube Alert 220822.85: Global MASTER-Net observations report DATE: 22/08/22 20:39:20 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs lipunov@xray.sai.msu.ru
V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin (Lomonosov Moscow State University, SAI, Physics Department),
R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA),
R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias),
D. Buckley (South African Astronomical Observatory),
O.A. Gres, N.M. Budnev (Irkutsk State University, API),
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov (Blagoveschensk Educational State University)
MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the IceCube Alert 220822.85 (trigger No 28816141,18h 13m 55.92s , +22d 09m 54.0s, R=1.28) errorbox 188 sec after notice time and 242 sec after trigger time at 2022-08-22 20:30:32 UT, with upper limit up to 19.0 mag. The observations began at zenith distance = 59 deg. The sun altitude is -53.7 deg.
The galactic latitude b = 17 deg., longitude l = 49 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2063850
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________
150 | 2022-08-22 20:28:45 | MASTER- | (18h 19m 48.33s , +21d 56m 58.3s) | C | 30 | 12.7 | 197 | 2022-08-22 20:29:26 | MASTER- | (18h 19m 41.50s , +21d 55m 55.1s) | C | 40 | 13.1 | 268 | 2022-08-22 20:30:32 | MASTER-SAAO | (18h 13m 01.23s , +22d 08m 46.1s) | C | 50 | 18.3 | 353 | 2022-08-22 20:31:52 | MASTER-SAAO | (18h 12m 59.88s , +22d 09m 53.2s) | C | 60 | 19.0 | Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.