TITLE:   GCN CIRCULAR
NUMBER:  40704
SUBJECT: GRB 250612C: Fermi GBM Final Real-time Localization
DATE:    25/06/12 15:02:11 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 14:53:16 UT on 12 Jun 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250612C (trigger 771432801.582428 / 250612620).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 113.2, Dec = 16.2 (J2000 degrees, equivalent to J2000 07h 32m, 16d 11'), with a statistical uncertainty of 1.4 degrees.

The angle from the Fermi LAT boresight is 96.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250612620/quicklook/glg_skymap_all_bn250612620.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250612620/quicklook/glg_healpix_all_bn250612620.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250612620/quicklook/glg_lc_medres34_bn250612620.gif