GCN Circular 40881
Subject
GRB 250702A: Fermi GBM Final Real-time Localization
Event
Date
2025-07-02T10:04:44Z (16 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 09:54:07 UT on 2 Jul 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250702A (trigger 773142852.561082 / 250702413).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 317.8, Dec = 48.1 (J2000 degrees, equivalent to J2000 21h 11m, 48d 06'), with a statistical uncertainty of 1.1 degrees.
The angle from the Fermi LAT boresight is 56.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250702413/quicklook/glg_skymap_all_bn250702413.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/bn250702413/quicklook/glg_healpix_all_bn250702413.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250702413/quicklook/glg_lc_medres34_bn250702413.gif