GCN Circular 31929
Subject
IceCube Alert 220421.22: Global MASTER-Net observations report
Date
2022-04-21T05:39:20Z (3 years ago)
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-OAGH robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Mexico (OAGH National Institute for Astrophysics, Optics and Electronics) was pointed to the IceCube Alert 220421.22 (trigger No 43687362,07h 37m 27.60s , +06d 02m 13.2s, R=0.74) errorbox 314 sec after notice time and 361 sec after trigger time at 2022-04-21 05:26:19 UT, with upper limit up to 17.8 mag. The observations began at zenith distance = 67 deg. The sun altitude is -39.6 deg.
The galactic latitude b = 14 deg., longitude l = 213 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1949987
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
396 | 2022-04-21 05:26:19 | MASTER-OAGH | (07h 37m 41.98s , +06d 02m 00.1s) | C | 70 | 17.0 |
396 | 2022-04-21 05:26:19 | MASTER-OAGH | (07h 37m 05.71s , +06d 30m 58.4s) | P- | 70 | 16.8 |
653 | 2022-04-21 05:30:10 | MASTER-OAGH | (07h 37m 05.77s , +06d 29m 03.1s) | P- | 120 | 17.1 |
653 | 2022-04-21 05:30:10 | MASTER-OAGH | (07h 37m 42.24s , +06d 00m 03.1s) | C | 120 | 17.8 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.