GCN Circular 31244
Subject
GRB 211216B: Fermi GBM Final Real-time Localization
Date
2021-12-16T13:31:20Z (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 13:21:07 UT on 16 Dec 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211216B (trigger 661353672.391664 / 211216556).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 100.8, Dec = 60.1 (J2000 degrees, equivalent to J2000 06h 43m, 60d 06'), with a statistical uncertainty of 4.3 degrees.
The angle from the Fermi LAT boresight is 100.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211216556/quicklook/glg_skymap_all_bn211216556.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/bn211216556/quicklook/glg_healpix_all_bn211216556.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211216556/quicklook/glg_lc_medres34_bn211216556.gif