GCN Circular 30662
Subject
Swift GRB210818.68: Global MASTER-Net observations report
Date
2021-08-19T16:21:54Z (3 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin,
V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva,
D.Kuvshinov, D. Cheryasov
(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, O.Ershova
(Irkutsk State University, API),
A. Tlatov, D. Dormidontov
(Kislovodsk Solar Station of the Pulkovo Observatory),
V. Yurkov, A. Gabovich, Yu. Sergienko
(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 GRB210818.68 (trigger No 1069242,19h 58m 22.32s , +35d 11m 39.5s, R=0.0015) errorbox 5096 sec after notice time and 5059 sec after trigger time at 2021-08-18 17:43:40 UT, with upper limit up to 18.0 mag. Observations started at twilight. The observations began at zenith distance = 26 deg. The sun altitude is -10.8 deg.
MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the Swift GRB210818.68 errorbox 6531 sec after notice time and 6495 sec after trigger time at 2021-08-18 18:07:35 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 16 deg. The sun altitude is -19.6 deg.
MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) was pointed to the Swift GRB210818.68 errorbox 22873 sec after notice time and 22836 sec after trigger time at 2021-08-18 22:39:57 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 10 deg. The sun altitude is -35.9 deg.
MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) was pointed to the Swift GRB210818.68 errorbox 26839 sec after notice time and 26802 sec after trigger time at 2021-08-18 23:46:02 UT, with upper limit up to 15.5 mag. The observations began at zenith distance = 78 deg. The sun altitude is -20.9 deg.
The galactic latitude b = 3 deg., longitude l = 72 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1693885
We obtain a following upper limits.
Tmid-T0 | Site |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________
5150 | MASTER-Tavrida | C | 180 | 16.7 |
5330 | MASTER-Tavrida | C | 540 | 17.1 | Coadd
5349 | MASTER-Tavrida | C | 180 | 16.9 |
5548 | MASTER-Tavrida | C | 180 | 17.0 |
5747 | MASTER-Tavrida | C | 180 | 17.1 |
5927 | MASTER-Tavrida | C | 540 | 17.4 | Coadd
5946 | MASTER-Tavrida | C | 180 | 17.1 |
6145 | MASTER-Tavrida | C | 180 | 17.2 |
6345 | MASTER-Tavrida | C | 180 | 17.1 |
6525 | MASTER-Tavrida | C | 540 | 17.0 | Coadd
6544 | MASTER-Tavrida | C | 180 | 16.8 |
6585 | MASTER-Kislovodsk | C | 180 | 13.3 |
6765 | MASTER-Kislovodsk | C | 540 | 15.9 | Coadd
6585 | MASTER-Kislovodsk | C | 180 | 13.8 |
6765 | MASTER-Kislovodsk | C | 540 | 16.1 | Coadd
6743 | MASTER-Tavrida | C | 180 | 15.6 |
6786 | MASTER-Kislovodsk | C | 180 | 14.7 |
6786 | MASTER-Kislovodsk | C | 180 | 14.8 |
6942 | MASTER-Tavrida | C | 180 | 17.1 |
7122 | MASTER-Tavrida | C | 540 | 17.5 | Coadd
6986 | MASTER-Kislovodsk | C | 180 | 16.3 |
6986 | MASTER-Kislovodsk | C | 180 | 16.3 |
7141 | MASTER-Tavrida | C | 180 | 17.3 |
7187 | MASTER-Kislovodsk | C | 180 | 16.8 |
7187 | MASTER-Kislovodsk | C | 180 | 16.7 |
7340 | MASTER-Tavrida | C | 180 | 17.3 |
7962 | MASTER-Kislovodsk | C | 180 | 17.0 |
7962 | MASTER-Kislovodsk | C | 180 | 17.0 |
8448 | MASTER-Kislovodsk | C | 180 | 17.5 |
8448 | MASTER-Kislovodsk | C | 180 | 17.4 |
8731 | MASTER-Kislovodsk | C | 180 | 17.3 |
8731 | MASTER-Kislovodsk | C | 180 | 17.3 |
9014 | MASTER-Kislovodsk | C | 180 | 16.4 |
9014 | MASTER-Kislovodsk | C | 180 | 16.5 |
10273 | MASTER-Tavrida | C | 180 | 16.9 |
10865 | MASTER-Kislovodsk | C | 180 | 16.6 |
10865 | MASTER-Kislovodsk | C | 180 | 16.7 |
12671 | MASTER-Kislovodsk | C | 180 | 16.3 |
12671 | MASTER-Kislovodsk | C | 180 | 16.3 |
14474 | MASTER-Kislovodsk | C | 180 | 17.0 |
14474 | MASTER-Kislovodsk | C | 180 | 17.0 |
16278 | MASTER-Kislovodsk | C | 180 | 16.1 |
16278 | MASTER-Kislovodsk | C | 180 | 15.9 |
16891 | MASTER-Tavrida | C | 180 | 17.0 |
17790 | MASTER-Tavrida | C | 180 | 17.8 |
18446 | MASTER-Tavrida | C | 180 | 17.8 |
18735 | MASTER-Tavrida | C | 180 | 14.9 |
19022 | MASTER-Tavrida | C | 180 | 15.1 |
20563 | MASTER-Tavrida | C | 180 | 17.7 |
22927 | MASTER-IAC | C | 180 | 17.3 |
22927 | MASTER-IAC | C | 180 | 17.0 |
23127 | MASTER-IAC | C | 180 | 17.4 |
23127 | MASTER-IAC | C | 180 | 17.1 |
23527 | MASTER-IAC | C | 180 | 17.3 |
23527 | MASTER-IAC | C | 180 | 17.2 |
23932 | MASTER-IAC | C | 180 | 17.4 |
23932 | MASTER-IAC | C | 180 | 17.1 |
24400 | MASTER-Tavrida | C | 180 | 18.0 |
24934 | MASTER-IAC | C | 180 | 17.3 |
24934 | MASTER-IAC | C | 180 | 17.1 |
26735 | MASTER-IAC | C | 180 | 17.4 |
26735 | MASTER-IAC | C | 180 | 17.2 |
26892 | MASTER-OAFA | C | 180 | 15.0 |
27128 | MASTER-OAFA | C | 180 | 15.3 |
27718 | MASTER-OAFA | C | 180 | 15.5 |
28166 | MASTER-Tavrida | C | 180 | 18.0 |
28739 | MASTER-IAC | C | 180 | 17.3 |
28739 | MASTER-IAC | C | 180 | 17.2 |
30740 | MASTER-IAC | C | 180 | 17.3 |
30740 | MASTER-IAC | C | 180 | 17.1 |
32543 | MASTER-IAC | C | 180 | 17.3 |
32543 | MASTER-IAC | C | 180 | 17.0 |
34348 | MASTER-IAC | C | 180 | 17.3 |
34348 | MASTER-IAC | C | 180 | 17.0 |
36161 | MASTER-IAC | C | 180 | 17.3 |
36161 | MASTER-IAC | C | 180 | 17.2 |
37985 | MASTER-IAC | C | 180 | 17.4 |
37985 | MASTER-IAC | C | 180 | 17.2 |
39809 | MASTER-IAC | C | 180 | 17.5 |
39809 | MASTER-IAC | C | 180 | 17.5 |
41613 | MASTER-IAC | C | 180 | 17.4 |
41613 | MASTER-IAC | C | 180 | 17.3 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.