TITLE: GCN CIRCULAR NUMBER: 27699 SUBJECT: GRB 200507A: Fermi GBM Final Real-time Localization DATE: 20/05/07 16:03:20 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 15:52:58 UT on 7 May 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200507A (trigger 610559583.838602 / 200507662). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 57.8, Dec = 65.5 (J2000 degrees, equivalent to J2000 03h 51m, 65d 30'), with a statistical uncertainty of 2.2 degrees. The angle from the Fermi LAT boresight is 46.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200507662/quicklook/glg_skymap_all_bn200507662.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/bn200507662/quicklook/glg_healpix_all_bn200507662.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200507662/quicklook/glg_lc_medres34_bn200507662.gif