[vsnet-grb-info 20406] GRB180316A: MASTER-IAC optical detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  22502
SUBJECT: GRB180316A: MASTER-IAC optical detection
DATE:    18/03/16 06:23:08 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

V. Lipunov, N.Tyurina, V.Kornilov, E.Gorbovskoy, P.Balanutsa, 
V.Vladimirov, A.Krylov, I.Gorbunov, A.Kuznetsov, V.Chazov, D. Kuvshinov, 
D.Zimnukhov
(Lomonosov Moscow State University, SAI),

R. Rebolo, M. Serra-Ricart
(The Instituto de Astrofisica de Canarias),


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),

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


O.Gres,  N.M.Budnev
(Irkutsk State University),

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

V.Yurkov, A.Gabovich, Yu.Sergienko
(Blagoveschensk Educational State University, Blagoveschensk),


MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in IAC was pointed to the  GRB180316A (Melandri et al GCN22500)
  15 sec after notice time 
and 44 sec after trigger time at 2018-03-16 04:58:09 UT.

There is new changing OT at SWIFT XRT (Evans et al. GCN 22501) coordinates 
17 41 42.94 +00 44 54.0

The 5-sigma upper limit on the first 10s image is  17.06mag
The message may be cited.


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The observations made on zenit distance = 42 degrees, galaxy latitude b = 
15 degree.
The moon ( 2 % bright part) below the horizon (The altitude of the Moon is 
-22 degree ).
The sun  altitude  is -30.4 degree.
The object can be observed till sunrise at 2018-03-16 07:14:55