TITLE:   GCN CIRCULAR
NUMBER:  31329
SUBJECT: GRB 211229A: Fermi GBM Final Real-time Localization
DATE:    21/12/29 03:39:48 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 03:29:15 UT on 29 Dec 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211229A (trigger 662441360.901398 / 211229145).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 295.0, Dec = 22.9 (J2000 degrees, equivalent to J2000 19h 40m, 22d 53'), with a statistical uncertainty of 3.7 degrees.

The angle from the Fermi LAT boresight is 94.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211229145/quicklook/glg_skymap_all_bn211229145.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/bn211229145/quicklook/glg_healpix_all_bn211229145.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211229145/quicklook/glg_lc_medres34_bn211229145.gif