[vsnet-grb-info 18929] GRB 170111A: MASTER-OAFA (Argentina) prompt OT observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  20427
SUBJECT: GRB 170111A: MASTER-OAFA (Argentina) prompt OT observations
DATE:    17/01/11 14:51:27 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

R.Podesta, C.Lopez, F. Podesta
Observatorio Astronomico Felix Aguilar (OAFA) , National University of San 
Juan, Argentina

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

V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina,
A.V.Krylov, I.Gorbunov, P.Balanutsa, A.Kuznetsov, V.V.Chazov
Lomonosov Moscow State University, Sternberg Astronomical Institut of MSU

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

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

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

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

R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias

MASTER-OAFA  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in OAFA (Argentina) was pointed to the  GRB170111.02 17 sec after 
notice time 
and 63 sec after trigger time at 2017-01-11 00:34:31 UT. On our first (10s 
exposure)  set we haven`t found optical transient  within SWIFT error-box 
(ra=20.7167 dec=-32.54 r=0.05).
The 5-sigma upper limit has been about 17.5 mag
The observations made on zenit distance = 25 degrees, galaxy latitude b = 
-81 degree.
The moon (97 % bright part) is 26 degrees above the horizon. The distance 
between  moon and  object is 84
Observations started at twilight.
The sun  altitude  is -9.8 degree.
The object can be observed till 2017-01-11 06:13:03.

  The 
message may be cited.