[vsnet-grb-info 15997] GRB 150103A: MASTER optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17279
SUBJECT: GRB 150103A: MASTER optical observations
DATE:    15/01/04 13:53:58 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

D.Buckley, S. Potter, A. Kniazev, M. Kotze
South African Astronomical Observatory

E. Gorbovskoy,V. Lipunov, N.Tyurina, P.Balanutsa, D.Denisenko, M.Pruzhinskaya, 
A.Kuznetsov, V.Kornilov, D.Kuvshinov,
Lomonosov Moscow State University, Sternberg Astronomical Institute

O.Gres, K.Ivanov,  S.Yazev, N.M.Budnev,  V.A.Poleshchuk
Irkutsk State University

V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov
Blagoveschensk Educational State University

A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory

V.Krushinsky, I.Zalozhnih,  A. Popov
Ural Federal University, Kourovka

H. Levato and C. Saffe
Instituto de Ciencias Astronomicas de la Tierra y del Espacio (ICATE),
San Juan, Argentina

C. Mallamacci, C. Lopez and F. Podest
Observatorio Astronomico Felix Aguilar (OAFA), San Juan National University, 
Argentina

MASTER-SAAO  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in South Africa (Sutherland) was pointed to the  GRB150103A 33 
sec after notice time and 115 sec after trigger time at
2015-01-03 20:04:14 UT. On our first 
(20s exposure)  set we haven`t found optical transient  within SWIFT 
error-box (Hagen et al., GCN Circ 17269; Evans, GCN Circ 17270; Cummings 
et al., GCN Circ 17274; Stroh et al., GCN Circ 17277).

The 5-sigma upper limit has been about 17.0mag

This limit slightly yearly than Zadko (Klotz et al., GCN CIRC 17273) and 
Swift UVOT (Hagen, GCN CIRC 17275), but not contradict to them.

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