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GCN Circular 29114

Subject
GRB 201221E: Fermi GBM Final Real-time Localization
Date
2020-12-21T23:50:46Z (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 23:28:47 UT on 21 Dec 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 201221E (trigger 630286132.63327 / 201221978).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 158.1, Dec = -39.9 (J2000 degrees, equivalent to J2000 10h 32m, -39d 53'), with a statistical uncertainty of 5.2 degrees.

The angle from the Fermi LAT boresight is 90.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201221978/quicklook/glg_skymap_all_bn201221978.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/bn201221978/quicklook/glg_healpix_all_bn201221978.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201221978/quicklook/glg_lc_medres34_bn201221978.gif
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