TITLE: GCN CIRCULAR NUMBER: 29919 SUBJECT: GRB 210501A: Fermi GBM Final Real-time Localization DATE: 21/05/01 05:05:20 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 04:55:00 UT on 1 May 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210501A (trigger 641537705.291634 / 210501205). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 357.8, Dec = -71.3 (J2000 degrees, equivalent to J2000 23h 51m, -71d 17'), with a statistical uncertainty of 11.7 degrees. The angle from the Fermi LAT boresight is 49.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210501205/quicklook/glg_skymap_all_bn210501205.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/bn210501205/quicklook/glg_healpix_all_bn210501205.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210501205/quicklook/glg_lc_medres34_bn210501205.gif