[vsnet-grb-info 16726] MASTER OT Detection during Fermi Trigger 458235025 inspection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  18007
SUBJECT: MASTER OT Detection during Fermi Trigger 458235025 inspection 
DATE:    15/07/10 20:00:46 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

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


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


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

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 Tunka was pointed to the  GRB150710.65 130 sec after notice 
time and 3592 sec after trigger time at 2015-07-10 16:30:13 UT. On our 
first (180s exposure)  set we  found OT MASTER J071803.26+644745.0 within 
FERMI error-box (ra=08 55 31 dec=+48 54 00 r=11.670000).
The OT unfiltered magnitude is 14.5m (limit 17.2m).
Coordinates OT source  (RA, Dec) = 07h 18m 03.26s +64d 47m 45.0s on 
2015-07-10.74346  UT.
This OT is identical to USNO-B1 star with B2=17.93, R2=17.97, I=17.66; 
also is a GALEX source (18.863) and a source from SDSS DR10 catalogue of 
candidate quasars (Brescia+, 2015) .
Previous outburst was detected as ASASSN-15bq and classified like UG

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