[vsnet-grb-info 23975] GRB 191023A: MASTER optical observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  26074
SUBJECT: GRB 191023A: MASTER optical observation
DATE:    19/10/25 17:37:47 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina,P.Balanutsa,A.Kuznetsov, V.Vladimirov, D. Vlasenko,
I.Gorbunov,D.Zimnukhov,V.Senik, T.Pogrosheva, K.Pozdnyakov,A.Chasovnikov, V.Topolev,D.Kuvshinov(Lomonosov Moscow State University, SAI,Physics Department),
R. Podesta, C.Lopez, F. Podesta, C.Francile(Observatorio AstronomicoFelixAguilar OAFA),
H.Levato(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),
R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias),
D. Buckley(South African Astronomical Observatory),
O.A. Gres, N.M. Budnev, O.Ershova(Irkutsk State University, API),
A. Tlatov, D. Dormidontov(Kislovodsk Solar Station of the Pulkovo Observatory),
V. Yurkov, A. Gabovich, Yu. Sergienko(Blagoveschensk Educational State University)

MASTER Global Robotic Net (http://observ.pereplet.ru, Lipunov etal.,2010,Advances in Astronomy, vol.2010, 30L)
started Fermi GRB 191023A / trigger 593536021 (GBM team GCN 26060, BALROG team Biltzinger et al. GCN 26061)
error box optical observation 596 sec after notice time (643 sec after trigger time)
at 2019-10-23 15:17:40 UT.

Real time updated cover map is available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1175192

MASTER-Kislovodsk robotic telescope  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory)
started inspect of the FERMI GRB191023.63  errorbox 
596 sec after notice time (643 sec after trigger time) at 2019-10-23 15:17:40 UT,
with upper limit up to  19.0 mag.
Observations started at twilight.  The observations began at zenith distance = 37 deg. The sun  altitude  was -11.8 deg.

MASTER-Tavrida robotic telescope  located in Russia  started inspect of the FERMI GRB191023.63 
errorbox  1974 sec after notice time (2021 sec after trigger time at 2019-10-23 15:40:37 UT),
with upper limit up to  18.4 mag.
Observations started at twilight.  The observations began at zenith distance = 37 deg. The sun  altitude  was -10.2 deg.

MASTER-Tunka robotic telescope  located in Russia (Applied Physics Institute, Irkutsk State University)
started inspect of the FERMI GRB191023.63 errorbox  1974 sec after notice time (80330 sec after trigger time at 2019-10-24 13:25:47 UT),
with upper limit up to  18.0 mag. 
The observations began at zenith distance = 56 deg. The sun  altitude  was -32.8 deg.

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB191023.63 errorbox
1974 sec after notice time and 1 days 9459 sec after trigger time at 2019-10-24 17:44:36 UT, with upper limit up to  16.4 mag. 
Observations started at twilight.  The observations began at zenith distance = 46 deg. The sun  altitude  is -10.4 deg.

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) 
started inspect of the FERMI GRB191023.63 errorbox  1974 sec after notice time (1 days 14406 sec after trigger time) at 2019-10-24 19:07:03 UT, 
with upper limit up to  17.9 mag.
Observations started at twilight.  The observations began at zenith distance = 24 deg. The sun  altitude  is -9.8 deg.

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University)
started inspect of the FERMI GRB191023.63 errorbox  1974 sec after notice time (1 days 30856 sec after trigger time at 2019-10-24 23:41:13 UT),
with upper limit up to  17.3 mag. 
Observations started at twilight.  The observations began at zenith distance = 47 deg. The sun  altitude  is -10.9 deg.

MASTER-Amur robotic telescope  located in Russia (Blagoveshchensk State Pedagogical University)
started inspect of the FERMI GRB191023.63 errorbox  1974 sec after notice time (1 days 76356 sec after trigger time at 2019-10-25 12:19:32 UT),
with upper limit up to  16.9 mag.
The observations began at zenith distance = 62 deg. The sun  altitude  is -37.8 deg.

The galactic latitude b = -60 deg., longitude l = 98 deg.

Reduction will be continued, up to now there is no OT detected inside both error-boxes.
The message may be cited.