GCN Circular 18169
Subject
GRB 150819A: MASTER-IAC early upper limit
Date
2015-08-19T10:46:45Z (9 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,
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)
located in IAC was pointed to the GRB150819.03 25 sec after notice time
and 100 sec after trigger time at 2015-08-19 00:51:51 UT. On our first
(20s exposure) set we haven`t found optical transient within SWIFT
error-box (Ukwatta, Barthelmy et al., GCN 18163; Evans, GCN 18165;
Evans et al., GCN 18167). Zenit distance was aboute ~76 degrees.
The 5-sigma upper limit has been about 17.5 mag
Our results are:
T_start T-Tmid Expt. Mlimit Coadd
00:51:51.6 112 20 17.5 1
00:51:51.6 163 90 18.0 3
00:54:05.5 337 180 18.9 3
00:51:51.6 536 760 19.8 10
01:06:31.0 1995 1800 20.4 10
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