TITLE:   GCN CIRCULAR
NUMBER:  35404
SUBJECT: GRB 231219A: Fermi GBM Final Real-time Localization
DATE:    23/12/19 17:22:54 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 17:12:22 UT on 19 Dec 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231219A (trigger 724698747.778088 / 231219717).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 231.6, Dec = 58.0 (J2000 degrees, equivalent to J2000 15h 26m, 58d 00'), with a statistical uncertainty of 14.2 degrees.

The angle from the Fermi LAT boresight is 21.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231219717/quicklook/glg_skymap_all_bn231219717.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/bn231219717/quicklook/glg_healpix_all_bn231219717.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231219717/quicklook/glg_lc_medres34_bn231219717.gif