TITLE:   GCN CIRCULAR
NUMBER:  29088
SUBJECT: GRB 201218B: Fermi GBM Final Real-time Localization
DATE:    20/12/18 19:19:33 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 19:09:13 UT on 18 Dec 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 201218B (trigger 630011358.922416 / 201218798).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 82.2, Dec = 26.4 (J2000 degrees, equivalent to J2000 05h 28m, 26d 23'), with a statistical uncertainty of 5.7 degrees.

The angle from the Fermi LAT boresight is 60.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201218798/quicklook/glg_skymap_all_bn201218798.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201218798/quicklook/glg_healpix_all_bn201218798.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201218798/quicklook/glg_lc_medres34_bn201218798.gif