TITLE:   GCN CIRCULAR
NUMBER:  40424
SUBJECT: GRB 250510C: Fermi GBM Final Real-time Localization
DATE:    25/05/10 22:23:13 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 22:12:40 UT on 10 May 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250510C (trigger 768607965.139286 / 250510925).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 127.9, Dec = 13.4 (J2000 degrees, equivalent to J2000 08h 31m, 13d 24'), with a statistical uncertainty of 12.8 degrees.

The angle from the Fermi LAT boresight is 15.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250510925/quicklook/glg_skymap_all_bn250510925.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/bn250510925/quicklook/glg_healpix_all_bn250510925.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250510925/quicklook/glg_lc_medres34_bn250510925.gif