TITLE:   GCN CIRCULAR
NUMBER:  31380
SUBJECT: GRB 220104A: Fermi GBM Final Real-time Localization
DATE:    22/01/04 04:11:29 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 SHORT GRB

At 04:01:02 UT on 4 Jan 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220104A (trigger 662961667.603716 / 220104167).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 197.8, Dec = 42.1 (J2000 degrees, equivalent to J2000 13h 11m, 42d 06'), with a statistical uncertainty of 3.1 degrees.

The angle from the Fermi LAT boresight is 17.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220104167/quicklook/glg_skymap_all_bn220104167.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220104167/quicklook/glg_healpix_all_bn220104167.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220104167/quicklook/glg_lc_medres34_bn220104167.gif