[vsnet-grb-info 23692] GRB 190919B: MASTER OT early detection at GROND position

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  25791
SUBJECT: GRB 190919B: MASTER OT early detection at GROND position
DATE:    19/09/20 07:30:40 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

N.Tyurina, V. Lipunov, E. Gorbovskoy, V.Kornilov, F.Balakin,
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 Astronomico Felix
Aguilar 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)


We see GRB190919B (INTEGRAL trigger 8377; Mereghetti et al. GCN 25788) at 
prompt and afterglow stage with flare (after 7 min)  on several MASTER 
telescopes (Lipunov et al., GCN 25787) at GROND position (Bolmer et al, 25789).

Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/event.php?id=1136619

The OT coordinates are:

  RA, Dec = 20h 47m 30.56s , -44d 41m 42s.5
Error = 0.3 arcsec


The observation and reduction will be continued.
The message may be cited.