[vsnet-grb-info 21515] SWIFT GRB190106.57 Global MASTER-Net OT detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23614
SUBJECT: SWIFT GRB190106.57 Global MASTER-Net OT detection
DATE:    19/01/06 13:42:57 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

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

V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, 
P.Balanutsa,
A.Kuznetsov, V.V.Chazov, 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

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

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)

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

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

MASTER-Amur robotic telescope (Global MASTER-Net: 
http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, 
vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical 
University) was pointed to the  GRB190106.57 20 sec after notice time and 
36 sec after trigger time at 2019-01-06 13:35:20 UT. On our second (10s 
exposure)  set , obtained 61 sec after tigger time at 2019-01-06 13:35:46 
UT, we  found 1 optical transient within SWIFT error-box (ra=29.8792 
dec=23.8567 r=0.05) brighter than 16.06.


  T-Tmid      Date      Time       Expt.        Ra                Dec           Mag
---------|---------------------|-------|-----------------|-----------------|-------
       66   2019-01-06 13:35:46      10   (  1h 59m 31.19s , +23d 50m 44.79s)    15.23

The 5-sigma upper limit has been about 16.06mag
The message may be cited.


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The galactic latitude b = -36 deg., longitude l = 143 deg.
The observations made on zenit distance = 45 deg.The moon ( 0 % bright 
part) below the horizon (The altitude of the Moon is -50 deg. ).
The sun  altitude  is -53.8 deg.
The object can be observed till 2019-01-07 18:34:53
.