TITLE:   GCN CIRCULAR
NUMBER:  29215
SUBJECT: GRB 210101A: Fermi GBM Final Real-time Localization
DATE:    21/01/01 15:03:31 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 14:53:06 UT on 1 Jan 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210101A (trigger 631205591.859738 / 210101620).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 136.7, Dec = 50.1 (J2000 degrees, equivalent to J2000 09h 06m, 50d 06'), with a statistical uncertainty of 4.6 degrees.

The angle from the Fermi LAT boresight is 147.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210101620/quicklook/glg_skymap_all_bn210101620.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/bn210101620/quicklook/glg_healpix_all_bn210101620.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210101620/quicklook/glg_lc_medres34_bn210101620.gif