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TITLE:   GCN CIRCULAR
NUMBER:  26293
SUBJECT: GRB 191125B: Fermi GBM Final Real-time Localization
DATE:    19/11/25 15:23:58 GMT
FROM:    Fermi GBM Team at MSFC/Fermi-GBM  <do_not_reply@GIOC.nsstc.nasa.gov>

The Fermi GBM team reports the detection of a likely LONG GRB

At 15:12:45 UT on 25 Nov 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 191125B (trigger 596387570.686402 / 191125634).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 353.5, Dec = 18.2 (J2000 degrees, equivalent to J2000 23h 33m, 18d 11'), with a statistical uncertainty of 4.1 degrees.

The angle from the Fermi LAT boresight is 66.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191125634/quicklook/glg_skymap_all_bn191125634.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191125634/quicklook/glg_healpix_all_bn191125634.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191125634/quicklook/glg_lc_medres34_bn191125634.gif

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TITLE:   GCN CIRCULAR
NUMBER:  26299
SUBJECT: GRB 191125B: MASTER-VWFC synchronous observation 
DATE:    19/11/27 18:43:59 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>

V. Lipunov, E. Gorbovskoy, V.Kornilov, K.Zhirkov, F.Balakin, V.Vladimirov,
A.Kuznetsov, N.Tiurina, P.Balanutsa,A.Kuznetsov,V.Vladimirov, D. Vlasenko, I.Gorbunov,
D.Zimnukhov, A.Pozdnyakov, E.Minkina, V.Senik (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),

MASTER Global Robotic Net (http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)
consists of 8 robotic telescopes with identical equipment (MASTER-Amur, 
-Tunka,-Ural, -Kislovodsk, -Tavrida, -SAAO, -IAC, -OAFA),
including wide field (twin MASTER telescopes with 2x8sq.deg. field of view)
and very wide field optical channels.

MASTER-Amur very wide field cameras(d=60 mm, FOV = 2x384 sq. degree) 
synchronously observed Fermi GRB191125B (GCN 26293) position before, 
during and after trigger time.
The synchronous images are available here:
http://master.sai.msu.ru/static/MASTER_FERMI_GRB191125B.gif
where 
Fermi team (GCN 26293) localization with systematical uncertainty
and
  BALROG localization (ApJ, 873,60, 2019) of GRB 191125B are at MASTER wide field cameras image.

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station)
started inspect of the Fermi GRB191125.63 
errorbox  321 sec after notice time and 473 sec after trigger time at 
2019-11-25 15:20:39 UT.

No optical transients were found (Lipunov et al. GCN 26294).

Real time updated cover map and OT discovered available here:
http://master.sai.msu.ru/site/master2/observ.php?id=1206143

The message may be cited.