GRB 211102A

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

At 08:06:03 UT on 2 Nov 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211102A (trigger 657533168.218864 / 211102338).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 30.8, Dec = 56.8 (J2000 degrees, equivalent to J2000 02h 03m, 56d 47'), with a statistical uncertainty of 4.1 degrees.

The angle from the Fermi LAT boresight is 17.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211102338/quicklook/glg_skymap_all_bn211102338.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211102338/quicklook/glg_healpix_all_bn211102338.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211102338/quicklook/glg_lc_medres34_bn211102338.gif

F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
657533168 at 08:06:03 on 02 Nov. 2021 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).

The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 37.1+/-3.1 deg
Decl.(2000.0) = 52.5+/-2.3 deg
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB211102338/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB211102338/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB211102338/json

V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, 
D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, T.Pogrosheva, E.Minkina,
A.Chasovnikov, V.Topolev, V.Grinshpun, D.Kuvshinov,  D. Cheryasov
(Lomonosov Moscow State University, SAI, Physics Department),

R. Podesta, C.Lopez, F. Podesta, C.Francile 
(Observatorio Astronomico Felix Aguilar OAFA),

R. Rebolo, M. Serra 
(The Instituto de Astrofisica de Canarias),

D. Buckley 
(South African Astronomical Observatory),

O.A. Gres, N.M. Budnev
(Irkutsk State University, API),

A. Tlatov, D. Dormidontov 
(Kislovodsk Solar Station of the Pulkovo Observatory),

A. Gabovich, V.Yurkov 
(Blagoveschensk Educational State University)


MASTER-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 211102A ( Fermi GBM team, GCN 31029
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 ) errorbox  26099 sec after notice time and 26125 sec after trigger time at 2021-11-02 15:21:29 UT, with upper limit up to  17.3 mag. Observations started at twilight.  The observations began at zenith distance = 56 deg. The sun  altitude  is -9.4 deg. 

The galactic latitude b = -4 deg., longitude l = 133 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1772827

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   26156 | 2021-11-02 15:21:29 |      MASTER-Tavrida | (02h 19m 20.35s , +52d 42m 02.2s) |   C |    60 | 17.2 |        
   26235 | 2021-11-02 15:22:48 |      MASTER-Tavrida | (02h 32m 24.06s , +52d 41m 08.7s) |   C |    60 | 17.3 |        
Filter C is a clear (unfiltred) band. 


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