TITLE: GCN CIRCULAR NUMBER: 32473 SUBJECT: GRB 220821A: Fermi GBM Final Real-time Localization DATE: 22/08/21 07:16:03 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 LONG GRB
At 07:05:35 UT on 21 Aug 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220821A (trigger 682758340.440514 / 220821296).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 133.6, Dec = 28.7 (J2000 degrees, equivalent to J2000 08h 54m, 28d 41'), with a statistical uncertainty of 3.6 degrees.
The angle from the Fermi LAT boresight is 74.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220821296/q...
The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220821296/q...
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220821296/q...