TITLE: GCN CIRCULAR NUMBER: 28833 SUBJECT: GRB 201104C: Fermi GBM Final Real-time Localization DATE: 20/11/04 21:35:03 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 19:23:25 UT on 4 Nov 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 201104C (trigger 626210610.205754 / 201104808). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 240.3, Dec = -36.7 (J2000 degrees, equivalent to J2000 16h 01m, -36d 42'), with a statistical uncertainty of 7.7 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/bn201104808/quicklook/glg_skymap_all_bn201104808.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/bn201104808/quicklook/glg_healpix_all_bn201104808.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201104808/quicklook/glg_lc_medres34_bn201104808.gif [GCN OPS NOTE(06Nov20): Due to the uncertainty of the arrival time with respect to the downtime window (15 hours) of the GCN Circulars processing system, the error in the date-time in the header of this Circular can be off anywhere from 0-15 hours.]