[vsnet-grb-info 21371] GRB 181201A MASTER-Net OT detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23470
SUBJECT: GRB 181201A MASTER-Net OT detection
DATE:    18/12/01 10:15:47 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

R. Podesta, Carlos Lopez and F. Podesta
Observatorio Astronomico Felix Aguilar (OAFA)

Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)

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

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

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

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

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, Lipunov 
et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA 
observatory of San Juan National University) was pointed to the  GRB181201.11 
10 sec after notice time and 18 sec after trigger time at 2018-12-01 02:40:30 
UT. On our first (10s exposure)  set we  found 1 optical transient within 
INTEGRAL error-box (ra=319.317 dec=-12.6325 r=0.05) brighter than 16.2.


  T-Tmid      Date      Time       Expt.        Ra                Dec      Mag
-------|---------------------|-------|-----------------|-----------------|------
     23   2018-12-01 02:40:30      10   ( 21h 17m 11.2s , -12d 37m 51.4s) |13.17

The 5-sigma upper limit has been about 16.2mag
The message may be cited.


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The galactic latitude b = -39 deg., longitude l = 39 deg.
The observations made on zenit distance = 76 deg.The moon (38 % bright part) 
below the horizon (The altitude of the Moon is -41 deg. ).
The sun  altitude  is -30.9 deg.
The object can be observed till 2018-12-01 03:49:27