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/quicklook/glg_skymap_all_bn230304265.png

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/quicklook/glg_healpix_all_bn230304265.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230304265/quicklook/glg_lc_medres34_bn230304265.gif