TITLE:   GCN CIRCULAR
NUMBER:  34969
SUBJECT: GRB 231108A: Fermi GBM Final Real-time Localization
DATE:    23/11/08 21:14:37 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 21:03:09 UT on 8 Nov 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231108A (trigger 721170194.442402 / 231108877).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 104.8, Dec = 50.5 (J2000 degrees, equivalent to J2000 06h 59m, 50d 30'), with a statistical uncertainty of 18.6 degrees.

The angle from the Fermi LAT boresight is 102.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231108877/quicklook/glg_skymap_all_bn231108877.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/bn231108877/quicklook/glg_healpix_all_bn231108877.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231108877/quicklook/glg_lc_medres34_bn231108877.gif