GCN Circular 40702

The Fermi GBM team reports the detection of a likely LONG GRB

"At 12:27:56.19 UT on 12 June 2025, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 250612B (trigger 771424081/250612519).

The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 231.28, Dec = -29.05 (J2000 degrees, equivalent to J2000 15h 25m, -29d 03'),
with a statistical uncertainty of 2.0 degrees.

The angle from the Fermi LAT boresight is 71.04 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250612519/quicklook/glg_skymap_all_bn250612519.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/bn250612519/quicklook/glg_healpix_all_bn250612519.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250612519/quicklook/glg_lc_medres34_bn250612519.gif"