GCN Circular 19838
Subject
Short GRB 160821B: MASTER early optical observations
Date
2016-08-22T09:08:42Z (8 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
R. Rebolo, M. Serra-Ricart, G. Israelian, N. Lodieu
The Instituto de Astrofisica de Canarias
V. Lipunov, N.Tyurina, E. Gorbovskoy, V.Kornilov,
P.Balanutsa, A.Kuznetsov, D.Kuvshinov
Lomonosov Moscow State University, Sternberg Astronomical Institute
K.Ivanov, O.Gres, N.M.Budnev, S.Yazev,
Irkutsk State University
D.Buckley, S. Potter, A.Kniazev, M.Kotze
South African Astronomical Observatory
A. Tlatov, V.Senik, D. Dormidontov, A.Parkhomenko
Kislovodsk Solar Station of the Pulkovo Observatory
V.Yurkov, Yu.Sergienko, A.Gabovich
Blagoveschensk Educational State University, Blagoveschensk
Hugo Levato, Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
R.Podesta, C.Mallamaci, C.Lopez, F. Podesta
Observatorio Astronomico Felix Aguilar (OAFA)
MASTER-IAC twin robotic telescope (MASTER-Net:
http://observ.pereplet.ru, online view http://161.72.133.2/)
located in IAC (Tenerife, Spain) was pointed to the
GRB160821B (Siegel et al., GCN 19833) 34 sec after notice time
and 53 sec after trigger time at 2016-08-21 22:30:06 UT.
The alert coordinates altitude was 55 deg. at MASTER-IAC, the Sun
altitude was -35d, the Moon distance is 90 degrees.
On our first (10s exposure - two images in perpendicular polarizations)
set we not found optical transient within SWIFT error-box (Evans et al., GCN 19837)
and at NOT OT position (Xu et al., GCN 19834) brighter then 16.6.
The resuts of the first 5 minutes observations are:
Id Pro.type UT Exp.time Limit Filt. Tube.
(Start) (s) (5sigma) (polarizator)
285342 Alert 22:30:06 10 16.6 P- WEST
285343 Alert 22:30:06 10 16.6 P| EAST
285342 Alert 22:30:06 10 16.6 P- WEST
285345 Alert 22:30:43 20 17.1 P| EAST
285346 Alert 22:31:24 30 17.1 P- WEST
285347 Alert 22:31:24 30 16.6 P| EAST
285348 Alert 22:32:08 30 16.6 P- WEST
285349 Alert 22:32:08 30 16.6 P| EAST
285350 Alert 22:32:50 40 17.2 P- WEST
285351 Alert 22:32:50 40 17.0 P| EAST
285352 Alert 22:33:43 50 17.3 P- WEST
285353 Alert 22:33:43 50 17.2 P| EAST
285355 Alert 22:34:46 70 17.5 P- WEST
285354 Alert 22:34:46 70 0.0 P| EAST
The limit of the coadded west tube images is 18.7 with start time
22:30:06, finish time = 22:35:56 and mean time = 22:33:01 UT.
The message may be cited.