GCN Circular 18665
Subject
GRB 151205B: MASTER-NET early optical observations
Date
2015-12-06T00:26:57Z (8 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, P.Balanutsa,
A.Kuznetsov, D.Kuvshinov,
Lomonosov Moscow State University, Sternberg Astronomical Institute
D.Buckley, S. Potter, A.Kniazev, M.Kotze
South African Astronomical Observatory
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Senik
Kislovodsk Solar Station of the Pulkovo Observatory
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov
Blagoveschensk Educational State University, Blagoveschensk
21:43:14.53
V.Krushinski, I.Zalozhnih, A. Popov
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)
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in SAAO was pointed to the GRB151205B (Marshall et. al. GCN
18659) 28 sec after notice time and 63 sec after trigger time at 21:44:18
UT in two polarisations. On our first (10s exposure) set we haven`t found
optical transient within SWIFT error-box (ra=02 44 38 dec=-43 28 50
r=0.050000).
The 5-sigma upper limit has been about 17.0 mag.
We obtain a following early upper limits at a single an coadd images
T_start T-Ts T-Tm Expt. Mlimit Coadd
--------|----|-----|-----|-------|-------|
21:44:18 63 68 10 17.0 1
21:44:18 63 115 60 18.7 3
21:44:18 63 501 680 20.6 10
21:44:51 96 106 20 17.8 1
21:45:32 137 152 30 18.1 1
21:46:21 187 207 40 18.3 1
21:47:21 246 271 50 18.7 1
21:48:31 316 346 60 19.0 1
21:49:51 396 436 80 19.3 1
21:51:47 513 563 100 19.6 1
21:53:45 630 695 130 19.9 1
21:56:13 778 858 160 20.0 1
...
Ts - is exposure start time
Tm - is exposure middle time
T - is trigger time
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