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TITLE:   GCN CIRCULAR
NUMBER:  26151
SUBJECT: GRB 191104A: Fermi GBM Final Real-time Localization
DATE:    19/11/04 03:03:53 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 SHORT GRB

At 02:53:31 UT on 4 Nov 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 191104A (trigger 594528816.391038 / 191104120).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 271.2, Dec = 18.7 (J2000 degrees, equivalent to J2000 18h 04m, 18d 41'), with a statistical uncertainty of 17.5 degrees.

The angle from the Fermi LAT boresight is 63.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191104120/quicklook/glg_skymap_all_bn191104120.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/bn191104120/quicklook/glg_healpix_all_bn191104120.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191104120/quicklook/glg_lc_medres34_bn191104120.gif

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TITLE:   GCN CIRCULAR
NUMBER:  26163
SUBJECT: Fermi GBM GRBs 191104 A, B, C and triggers  594534420/191104185 and 594563923/191104527 are not GRBs
DATE:    19/11/04 15:41:11 GMT
FROM:    Andreas von Kienlin at MPE  <azk@mpe.mpg.de>

A. von Kienlin (MPE) reports on behalf of the Fermi Gamma-ray Burst Monitor Team:

“On 04 November the Fermi Gamma-ray Burst Monitor triggered on SGR-like bursts from the direction of  SGR 1935+2154, tentatively classified as GRBs, which are in fact not due to GRBs:

at 01:20:24.06 UT on 4 Nov 2019, trigger 594523229/191104056, 

at 02:53:31.39 UT on 4 Nov 2019, trigger 594528816/191104120,  misclassified as GRB 191104A in GCN 26151, 

at 04:26:55.87 UT on 4 Nov 2019, trigger 594534420/191104185,

at 09:17:53.50 UT on 4 Nov 2019, trigger 594551878/191104387, misclassified as GRB 191104B in GCN 26154, 

at 10:44:26.31 UT on 4 Nov 2019, trigger 594557071/191104448), misclassified as GRB 191104C in GCN 26157,

and at 12:38:38 UT on 04 November 2019, trigger 594563923/191104527"