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GCN Circular 17978

Subject
GRB 150627A: MASTER-SAAO OT Detection
Date
2015-06-28T09:35:42Z (8 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy,  N.Tyurina, V.Kornilov, 
P.Balanutsa,A.Kuznetsov,D.Kuvshinov,
Lomonosov Moscow State University, Sternberg Astronomical Institute


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


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


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

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

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

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

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)

MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in SAAO was pointed to the  GRB150627.18 10133 sec after notice 
time and 55479 sec after trigger time at 2015-06-27 19:48:02 
16:32:07 UT. On our 
first (180s exposure)  set we  found optical transient within LAT 
error-box (ra=07 49 57 dec=-51 33 34 r=0.500000, Arimoto et al., GCN 
17791) brighter then 16.87.

07h 49m 53.05s , -51d 29m 21s.4  error =+-1.0
m ~ 19.0

This postion 2 arcsec close X-ray position (Gompertz et al., 17976)
The 5-sigma upper limit has been about 16.87mag
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