GCN Circular 32871
Subject
Swift GRB 221027B: Global MASTER-Net observations report
Date
2022-10-28T07:12:31Z (2 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Swift GRB 221027B ( A. Y. Lien et al., GCN 32867) errorbox 21757 sec after notice time and 22094 sec after trigger time at 2022-10-28 01:21:53 UT, with upper limit up to 18.5 mag. The observations began at zenith distance = 79 deg. The sun altitude is -31.2 deg.
The galactic latitude b = 57 deg., longitude l = 80 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2136676
We obtain a following upper limits.
Tmid-T0 | Site |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________
22185 | MASTER-Tavrida | C | 180 | 17.6 |
22185 | MASTER-Tavrida | C | 180 | 15.2 |
22376 | MASTER-Tavrida | C | 180 | 17.9 |
22376 | MASTER-Tavrida | C | 180 | 15.1 |
22662 | MASTER-Tavrida | C | 180 | 18.3 |
22662 | MASTER-Tavrida | C | 180 | 15.4 |
23028 | MASTER-Tavrida | C | 180 | 18.3 |
23028 | MASTER-Tavrida | C | 180 | 16.0 |
23985 | MASTER-Tavrida | C | 180 | 18.5 |
23985 | MASTER-Tavrida | C | 180 | 18.0 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.