GCN Circular 22297

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

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

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, 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

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

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


MASTER-Kislovodsk  robotic telescope (MASTER-Net: 
http://observ.pereplet.ru) 
located in Kislovodsk was pointed to the  GRB180102A 23 sec after notice 
time and 43 sec after trigger time at 2018-01-02 15:50:27 UT (Page et 
al., GCN #22292;  Veres GCN22295
Not found
 
 
). On our first 
(10s exposure)  set we haven`t found optical transient  within Swift 
error-box (D'Ai et al., GCN #22296; Beardmore et al., GCN 22294
Not found
 
 
).
The 5-sigma upper limit has been about 13.7 mag
The message may be cited.


The observations made on zenit distance = 74 degrees, galaxy latitude b = 
55 degree.
The moon (99 % bright part) is 14 degrees above the horizon. The distance 
between  moon and  object is 73
The sun  altitude  is -22.3 degree.
The object can be observed till sunrise at 2018-01-03 04:41:55.

MASTER-Tavrida  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in Crimea was pointed to the  GRB180102.66 3221 sec after notice 
time and 3247 sec after trigger time at 2018-01-02 16:43:51 UT. On our 
22-th (180s exposure)  set we haven`t found optical transient  within 
SWIFT error-box (ra=203.113 dec=62.1472 r=0.05).
The message may be cited.


The observations made on zenit distance = 73 degrees, galaxy latitude b = 
55 degree.
The moon (99 % bright part) is 18 degrees above the horizon. The distance 
between  moon and  object is 73
The sun  altitude  is -25.8 degree.
The object can be observed till sunrise at 2018-01-03 05:20:03.

MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in Blagoveschensk was pointed to the  GRB180102.66 21451 sec after 
notice time and 21471 sec after trigger time at 2018-01-02 21:47:35 UT. We 
not optical transient within  SWIFT error-box (ra=203.113 dec=62.1472 
r=0.05) brighter then 16.7.

The 5-sigma upper limit has been about 16.24mag
The message may be cited.

The observations made on zenit distance = 12 degrees, galaxy latitude b = 
55 degree.
The moon (99 % bright part) is 20 degrees above the horizon. The distance 
between  moon and  object is 72
Observations started at twilight.
The sun  altitude  is -15.2 degree.
The object can be observed till sunrise at 2018-01-03 23:26:49

This message can be cited.