TITLE: GCN CIRCULAR NUMBER: 33395 SUBJECT: GRB 230304A: Fermi GBM Final Real-time Localization DATE: 23/03/04 06:31:10 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 06:20:54 UT on 4 Mar 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230304A (trigger 699603659.15977 / 230304265).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 29.2, Dec = 32.8 (J2000 degrees, equivalent to J2000 01h 56m, 32d 47'), with a statistical uncertainty of 1.6 degrees.
The angle from the Fermi LAT boresight is 103.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230304265/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/bn230304265/q...
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230304265/q...