TITLE: GCN CIRCULAR NUMBER: 33396 SUBJECT: GRB 230304B: Fermi GBM Final Real-time Localization DATE: 23/03/04 14:46:09 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 14:35:49 UT on 4 Mar 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230304B (trigger 699633354.142652 / 230304608).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 111.7, Dec = 0.9 (J2000 degrees, equivalent to J2000 07h 26m, 0d 54'), with a statistical uncertainty of 1.0 degrees.
The angle from the Fermi LAT boresight is 28.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230304608/q...
The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230304608/q...
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230304608/q...