TITLE:   GCN CIRCULAR
NUMBER:  34108
SUBJECT: GRB 230628D: Fermi GBM Final Real-time Localization
DATE:    23/06/28 20:32:52 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 20:22:31 UT on 28 Jun 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230628D (trigger 709676556.5632 / 230628849).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 175.0, Dec = 12.3 (J2000 degrees, equivalent to J2000 11h 39m, 12d 18'), with a statistical uncertainty of 1.6 degrees.

The angle from the Fermi LAT boresight is 25.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230628849/quicklook/glg_skymap_all_bn230628849.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/bn230628849/quicklook/glg_healpix_all_bn230628849.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230628849/quicklook/glg_lc_medres34_bn230628849.gif

