GCN Circular 31171
Subject
GRB 211204C: Fermi GBM Final Real-time Localization
Date
2021-12-04T21:47:28Z (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 21:37:00 UT on 4 Dec 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211204C (trigger 660346625.552088 / 211204901).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 346.4, Dec = 55.8 (J2000 degrees, equivalent to J2000 23h 05m, 55d 47'), with a statistical uncertainty of 1.7 degrees.
The angle from the Fermi LAT boresight is 146.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211204901/quicklook/glg_skymap_all_bn211204901.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/bn211204901/quicklook/glg_healpix_all_bn211204901.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211204901/quicklook/glg_lc_medres34_bn211204901.gif