TITLE:   GCN CIRCULAR
NUMBER:  31167
SUBJECT: GRB 211204A: Fermi GBM Final Real-time Localization
DATE:    21/12/04 03:38:02 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 03:27:36 UT on 4 Dec 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211204A (trigger 660281261.437168 / 211204144).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 35.4, Dec = -49.5 (J2000 degrees, equivalent to J2000 02h 21m, -49d 30'), with a statistical uncertainty of 10.3 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/2021/bn211204144/quicklook/glg_skymap_all_bn211204144.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211204144/quicklook/glg_healpix_all_bn211204144.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211204144/quicklook/glg_lc_medres34_bn211204144.gif