TITLE:   GCN CIRCULAR
NUMBER:  33467
SUBJECT: GRB 230313A: Fermi GBM Final Real-time Localization
DATE:    23/03/13 11:46:22 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 11:38:43 UT on 13 Mar 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230313A (trigger 700400328.006796 / 230313485).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 202.4, Dec = 47.2 (J2000 degrees, equivalent to J2000 13h 29m, 47d 12'), with a statistical uncertainty of 1.6 degrees.

The angle from the Fermi LAT boresight is 107.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230313485/quicklook/glg_skymap_all_bn230313485.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/bn230313485/quicklook/glg_healpix_all_bn230313485.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230313485/quicklook/glg_lc_medres34_bn230313485.gif