TITLE:   GCN CIRCULAR
NUMBER:  33545
SUBJECT: GRB 230330B: Fermi GBM Final Localization
DATE:    23/03/30 16:48:56 GMT
FROM:    Joshua Wood at MSFC/Fermi-GBM  <joshua.r.wood@nasa.gov>

The Fermi GBM team reports the detection of a likely LONG GRB

"At 00:26:04 UT on 30 March 2023, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 230330B (trigger 701828769/230330018).

The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 65.05, Dec = -35.22 (J2000 degrees, equivalent to J2000 4h 20m, -35d 13'),
with a statistical uncertainty of 8.61 degrees.

The angle from the Fermi LAT boresight is 32 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230330018/quicklook/glg_skymap_all_bn230330018.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/bn230330018/quicklook/glg_healpix_all_bn230330018.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230330018/quicklook/glg_lc_medres34_bn230330018.gif"