TITLE:   GCN CIRCULAR
NUMBER:  33445
SUBJECT: GRB 230310A: Fermi GBM Final Real-time Localization
DATE:    23/03/10 00:55:20 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 00:45:01 UT on 10 Mar 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230310A (trigger 700101906.130722 / 230310031).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 257.6, Dec = -23.5 (J2000 degrees, equivalent to J2000 17h 10m, -23d 30'), with a statistical uncertainty of 7.2 degrees.

The angle from the Fermi LAT boresight is 120.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230310031/quicklook/glg_skymap_all_bn230310031.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/bn230310031/quicklook/glg_healpix_all_bn230310031.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230310031/quicklook/glg_lc_medres34_bn230310031.gif