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GRB 191104B

GCN Circular 26154

Subject
GRB 191104B: Fermi GBM Final Real-time Localization
Date
2019-11-04T09:28:18Z (6 years ago)
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 09:17:53 UT on 4 Nov 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 191104B (trigger 594551878.499554 / 191104387).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 294.3, Dec = 18.9 (J2000 degrees, equivalent to J2000 19h 37m, 18d 53'), with a statistical uncertainty of 6.8 degrees.

The angle from the Fermi LAT boresight is 59.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191104387/quicklook/glg_skymap_all_bn191104387.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/bn191104387/quicklook/glg_healpix_all_bn191104387.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191104387/quicklook/glg_lc_medres34_bn191104387.gif

GCN Circular 26160

Subject
GRB 191104B/GRB 191104C are SGR 1935+2154
Date
2019-11-04T12:35:55Z (6 years ago)
From
Jochen Greiner at MPI <jcg@mpe.mpg.de>
J.M. Burgess and J. Greiner (both MPE Garching) report:

We note that the last two Fermi/GBM triggers (GRB 191104B: Fermi team at MSFC 
et al., GCN #26154;  GRB 191104C: Kunzweiler et al., GCN #26158) were 
misclassified as GRBs, but due to their short duration, soft spectrum and 
positional coincidence are likely outbursts from SGR 1935+2154 (which also 
triggered Swift earlier today (Ambrosi et al., GCN 26153).

For the spectral analysis see 
https://grb.mpe.mpg.de/grb/GRB191104387/ and
https://grb.mpe.mpg.de/grb/GRB191104448/

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