TITLE: GCN CIRCULAR NUMBER: 33390 SUBJECT: GRB 230301B: Fermi GBM Final Real-time Localization DATE: 23/03/01 16:39:13 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 SHORT GRB
At 16:28:43 UT on 1 Mar 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230301B (trigger 699380928.235244 / 230301687).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 66.6, Dec = -7.0 (J2000 degrees, equivalent to J2000 04h 26m, -7d 00'), with a statistical uncertainty of 9.6 degrees.
The angle from the Fermi LAT boresight is 31.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230301687/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/bn230301687/q...
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230301687/q...