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GCN Circular 29081

Subject
GRB 201218A: Fermi GBM Final Real-time Localization
Date
2020-12-18T04:24:37Z (3 years ago)
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 04:14:15 UT on 18 Dec 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 201218A (trigger 629957660.899176 / 201218177).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 286.9, Dec = 24.2 (J2000 degrees, equivalent to J2000 19h 07m, 24d 11'), with a statistical uncertainty of 1.0 degrees.

The angle from the Fermi LAT boresight is 95.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201218177/quicklook/glg_skymap_all_bn201218177.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/bn201218177/quicklook/glg_healpix_all_bn201218177.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201218177/quicklook/glg_lc_medres34_bn201218177.gif
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