GCN Circular 41028
Subject
GRB 250708A: Fermi GBM Final Real-time Localization
Event
Date
2025-07-08T15:02:38Z (7 days ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely LONG GRB
At 14:52:02 UT on 8 Jul 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250708A (trigger 773679127.950166 / 250708619).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 255.1, Dec = 13.0 (J2000 degrees, equivalent to J2000 17h 00m, 13d 00'), with a statistical uncertainty of 5.0 degrees.
The angle from the Fermi LAT boresight is 83.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250708619/quicklook/glg_skymap_all_bn250708619.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/bn250708619/quicklook/glg_healpix_all_bn250708619.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250708619/quicklook/glg_lc_medres34_bn250708619.gif