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TITLE:   GCN CIRCULAR
NUMBER:  26055
SUBJECT: GRB 191022A: Fermi GBM Final Real-time Localization
DATE:    19/10/22 07:00:19 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 06:50:05 UT on 22 Oct 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 191022A (trigger 593419810.073896 / 191022285).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 273.1, Dec = -23.1 (J2000 degrees, equivalent to J2000 18h 12m, -23d 06'), with a statistical uncertainty of 3.2 degrees.

The angle from the Fermi LAT boresight is 36.0 degrees.

The skymap can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191022285/quicklook/glg_skymap_all_bn191022285.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191022285/quicklook/glg_healpix_all_bn191022285.fit

The GBM light curve can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191022285/quicklook/glg_lc_medres34_bn191022285.gif

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TITLE:   GCN CIRCULAR
NUMBER:  26056
SUBJECT: GRB 191022A: BALROG localization (Fermi Trigger 593419810 / GRB 191022285)
DATE:    19/10/22 08:05:28 GMT
FROM:    Jochen Greiner at MPE,Garching  <jcg@mpe.mpg.de>

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
593419810 at 06:50:05 on 22 Oct. 2019 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) = 277.1+/-5.2 deg
Decl.(2000.0) = -19.6+/-3.6 deg
We estimate an additional systematic error of 2 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB191022285/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB191022285/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB191022285/json