TITLE:   GCN CIRCULAR
NUMBER:  33987
SUBJECT: GRB 230617A: Fermi GBM Final Real-time Localization
DATE:    23/06/17 22:23:59 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 SHORT GRB

At 22:13:31 UT on 17 Jun 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230617A (trigger 708732816.996698 / 230617926).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 139.4, Dec = -70.5 (J2000 degrees, equivalent to J2000 09h 17m, -70d 30'), with a statistical uncertainty of 25.5 degrees.

The angle from the Fermi LAT boresight is 90.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230617926/quicklook/glg_skymap_all_bn230617926.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/bn230617926/quicklook/glg_healpix_all_bn230617926.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230617926/quicklook/glg_lc_medres34_bn230617926.gif