TITLE: GCN CIRCULAR NUMBER: 27174 SUBJECT: GRB 200224B: Fermi GBM Final Real-time Localization DATE: 20/02/24 05:16:06 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 05:05:49 UT on 24 Feb 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200224A (trigger 604213554.278888 / 200224212). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 177.9, Dec = -28.9 (J2000 degrees, equivalent to J2000 11h 51m, -28d 53'), with a statistical uncertainty of 3.1 degrees. The angle from the Fermi LAT boresight is 23.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200224212/quicklook/glg_skymap_all_bn200224212.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/bn200224212/quicklook/glg_healpix_all_bn200224212.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200224212/quicklook/glg_lc_medres34_bn200224212.gif [GCN OPS NOTE(24feb20): This is the third Circular in the sequence of 8 circulars which were all labeled A because of the sequence assigner being offline. This circular was orginally, incorrectly labelled A, but the true letter identity is B.]