TITLE:   GCN CIRCULAR
NUMBER:  36606
SUBJECT: GRB 240603C: Fermi GBM Final Real-time Localization
DATE:    24/06/03 10:19:42 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 10:09:11 UT on 3 Jun 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240603C (trigger 739102156.345702 / 240603423).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 272.6, Dec = -35.8 (J2000 degrees, equivalent to J2000 18h 10m, -35d 47'), with a statistical uncertainty of 2.9 degrees.

The angle from the Fermi LAT boresight is 84.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240603423/quicklook/glg_skymap_all_bn240603423.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240603423/quicklook/glg_healpix_all_bn240603423.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240603423/quicklook/glg_lc_medres34_bn240603423.gif