TITLE:   GCN CIRCULAR
NUMBER:  34949
SUBJECT: GRB 231104B: Fermi GBM Final Real-time Localization
DATE:    23/11/04 23:21:14 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 23:10:39 UT on 4 Nov 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231104B (trigger 720832244.521916 / 231104966).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 10.9, Dec = -41.8 (J2000 degrees, equivalent to J2000 00h 43m, -41d 47'), with a statistical uncertainty of 3.3 degrees.

The angle from the Fermi LAT boresight is 124.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231104966/quicklook/glg_skymap_all_bn231104966.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231104966/quicklook/glg_healpix_all_bn231104966.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231104966/quicklook/glg_lc_medres34_bn231104966.gif