[vsnet-grb-info 17771] GRB 160321A: MASTER observations zero Galaxy latitude GRB

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19212
SUBJECT: GRB 160321A: MASTER observations zero Galaxy latitude GRB
DATE:    16/03/21 17:01:43 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

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

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

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

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

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

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

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)

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


MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in Kislovodsk was pointed to the  GRB160321A 6 sec after notice 
time and 68 sec after trigger time at 2016-03-21 15:56:35 UT. We do not 
found optical transient within SWIFT error-box 
(Stamatikos et al., GCN 60321A) brighter then 13.1.
After Sunset we found:


Pro.type	Date time 	     Exp.time	Limit	Filt.	Tube.
Alert 	      2016-03-21 16:43:44	180	18.6	W	WEST
Alert 	      2016-03-21 16:43:44	180	18.1	W	EAST
Alert 	      2016-03-21 16:40:18	180	18.6	W	WEST
Alert 	      2016-03-21 16:36:45	180	18.6	W	WEST
Alert 	      2016-03-21 16:36:45	180	18.1	W	EAST
Alert 	      2016-03-21 16:33:16	180	18.5	W	WEST
Alert 	      2016-03-21 16:28:25	180	17.6	P	WEST
Alert 	      2016-03-21 16:28:25	180	17.6	P	EAST
Alert 	      2016-03-21 16:21:39	180	17.4	P	EAST

The galaxy latitude is about zero. So this is the optical free GRB.


The message may be cited.