TITLE:   GCN CIRCULAR
NUMBER:  29334
SUBJECT: GRB 210120A: Fermi GBM Final Real-time Localization
DATE:    21/01/20 07:21:03 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 07:10:44 UT on 20 Jan 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210120A (trigger 632819449.704302 / 210120299).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 163.4, Dec = 17.1 (J2000 degrees, equivalent to J2000 10h 53m, 17d 06'), with a statistical uncertainty of 3.8 degrees.

The angle from the Fermi LAT boresight is 83.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210120299/quicklook/glg_skymap_all_bn210120299.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/bn210120299/quicklook/glg_healpix_all_bn210120299.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210120299/quicklook/glg_lc_medres34_bn210120299.gif