TITLE:   GCN CIRCULAR
NUMBER:  33481
SUBJECT: GRB 230316A: Fermi GBM Final Real-time Localization
DATE:    23/03/16 13:16:50 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 13:06:30 UT on 16 Mar 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230316A (trigger 700664795.31625 / 230316546).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 273.1, Dec = -64.9 (J2000 degrees, equivalent to J2000 18h 12m, -64d 54'), with a statistical uncertainty of 1.7 degrees.

The angle from the Fermi LAT boresight is 54.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230316546/quicklook/glg_skymap_all_bn230316546.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/bn230316546/quicklook/glg_healpix_all_bn230316546.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230316546/quicklook/glg_lc_medres34_bn230316546.gif