GCN Circular 18221
Subject
GRB 150831B: MASTER-IAC early optical observations
Event
Date
2015-09-01T07:28:29Z (10 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias
V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov,
P.Balanutsa, A.Kuznetsov, D.Kuvshinov, E.Popova
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, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov, A.Gabovich
Blagoveschensk Educational State University, Blagoveschensk
V.Krushinski, I.Zalozhnih
Ural Federal University, Kourovka
Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
Claudio Mallamaci, Carlos Lopez and Federico Podest
Observatorio Astronomico Felix Aguilar (OAFA)
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru;
http://161.72.133.2/)
located in IAC was pointed to the GRB150831B 24 sec after notice time
and 56 sec after trigger time at 2015-08-31 22:20:23 UT (Swift: Marshall
et al., GCN 18215; and Fermi: Veres and C. Meegan, GCN 18220) .
On our first (10s exposure) set (two polarisations) we did not found
optical transient
within SWIFT error-box (Marshall et al., GCN 18215; Evans et al., GCN
18217) brighter then 16.3. The observations were stoped by beautifull
Canarian sun rise ( see
http://observ.pereplet.ru/images/webcam01spt2015.jpg ) at 2015-09-01
06:37:36 UT.
Pro.type Date time + - Exp.time Limit Filt. Tube.
Start
Alert 2015-08-31 22:20:23 10 16.3 P WEST
Alert 2015-08-31 22:20:23 10 15.6 P EAST
Alert 2015-08-31 22:21:07 20 16.4 P WEST
Alert 2015-08-31 22:21:07 20 15.9 P EAST
Alert 2015-08-31 22:21:37 30 16.8 P WEST
Alert 2015-08-31 22:21:37 30 16.2 P EAST
Alert 2015-08-31 22:22:18 30 0.0* P WEST
Alert 2015-08-31 22:22:18 30 16.2 P EAST
Alert 2015-08-31 22:22:57 40 16.9 P WEST
Alert 2015-08-31 22:22:57 40 16.3 P EAST
Alert 2015-08-31 22:23:47 50 17.0 P WEST
Alert 2015-08-31 22:23:47 50 16.5 P EAST
Alert 2015-08-31 22:24:47 60 17.0 P WEST
Alert 2015-08-31 22:24:47 60 16.5 P EAST
Alert 2015-08-31 22:25:56 80 17.2 P WEST
Alert 2015-08-31 22:25:56 80 16.6 P EAST
Alert 2015-08-31 22:27:26 100 17.2 P WEST
Alert 2015-08-31 22:27:26 100 16.6 P EAST
Alert 2015-08-31 22:29:17 120 17.3 P WEST
Alert 2015-08-31 22:29:17 120 16.6 P EAST
Alert 2015-08-31 22:31:27 140 17.3 P WEST
Alert 2015-08-31 22:31:27 140 16.7 P EAST
Alert 2015-08-31 22:33:57 170 17.3 P WEST
Alert 2015-08-31 22:33:57 170 16.7 P EAST
* - no stars
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