TITLE: GCN CIRCULAR NUMBER: 30853 SUBJECT: GRB 210919B: Fermi GBM Final Real-time Localization DATE: 21/09/19 15:51:07 GMT 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 SHORT GRB At 15:39:51 UT on 19 Sep 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210919B (trigger 653758796.95736 / 210919653). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 215.2, Dec = -77.1 (J2000 degrees, equivalent to J2000 14h 20m, -77d 05'), with a statistical uncertainty of 9.2 degrees. The angle from the Fermi LAT boresight is 53.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210919653/q... The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210919653/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210919653/q...