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GCN Circular 20133

GRB 161105A: MASTER-IAC early optical observations
2016-11-05T10:56:14Z (8 years ago)
Vladimir Lipunov at Moscow State U/Krylov Obs <>
V. Lipunov, E.Gorbovskoy, N.Tyurina, V.Kornilov,
O.Gress, P.Balanutsa, A.Kuznetsov, D.Kuvshinov
Lomonosov Moscow State University, Sternberg Astronomical Institute

R. Rebolo, M. Serra Ricart, N. Lodieu, G. Israelian
The Instituto de Astrofisica de Canarias

R.Podesta, C.Lopez, F.Podesta
Observatorio Astronomico Felix Aguilar (OAFA), San Juan Univerdity,

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

D.Buckley, S. Potter,
South African Astronomical Observatory

O.Gres, K.Ivanov, J.Rabinovich, N.M.Budnev,
Irkutsk State University

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

MASTER II  robotic telescope (MASTER-Net: 
located in IAC was pointed to the  GRB161105A  27 sec after notice time 
and 42 sec after trigger time at 2016-11-05 04:53:44 UT. On our first (10s 
exposure)  set we haven`t found optical transient  within SWIFT error-box 
(ra=120.163 dec=-44.7794 r=0.05) (Page et al., GCN 20131).
The 5-sigma upper limit has been about  16.4 mag (polaroid, 

The observations made on zenit distance = 75 degrees, galaxy latitude b = 
-7 degree. The moon (25 % bright part) below the horizon (The altitude of 
the Moon is  -80 degree ).
The sun  altitude  is -32.4 degree.
The object can be observed till sunrise at 2016-11-05 07:20:31

Maximal coadded limit ~19.5 m. No OT found.

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