GCN Circular 26596
Subject
Swift GRB191227A: Global MASTER-Net OT detection
Date
2019-12-27T02:46:31Z (5 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa,
A.Kuznetsov, D. Vlasenko, F. Balakin
Lomonosov Moscow State University,
Sternberg Astronomical Institute, Moscow State University
R. Podesta, Carlos Lopez and F. Podesta
Observatorio Astronomico Felix Aguilar (OAFA)
D. Buckley, S. Potter, A. Kniazev, M. Kotze
South African Astronomical Observatory
K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk
Irkutsk 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
Hugo Levato
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
MASTER-OAFA robotic telescope (Global 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 GRB191227.07 31 sec after notice
time and 51 sec after trigger time at 2019-12-27 01:40:28 UT. On our first
(10s exposure) set we found 1 optical transient within Swift error-box
(ra=319.167 dec=-16.7033 r=0.05) brighter than 15.3.
T-Tmid Date Time Expt. Ra Dec Mag
---------|---------------------|-------|-----------------|-----------------|-------
56 2019-12-27 01:40:28 10 (21h 16m 37.28s , -16d 43m 33.5s) 14.4
The 5-sigma upper limit has been about 15.3mag
The message may be cited.
The OT has irregular early time behaviour since 51.1 till 501.5 seconds
after the trigger.
The galactic latitude b = -40 deg., longitude l = 34 deg.
The observations made on zenith distance = 83 deg.The moon ( 1 % bright
part) below the horizon (The altitude of the Moon is -14 deg. ).
The sun altitude is -20.6 deg.