GCN Circular 40885
Subject
GRB 250702C: Fermi GBM Final Real-time Localization
Event
Date
2025-07-02T14:59:49Z (2 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 14:49:31 UT on 2 Jul 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250702C (trigger 773160576.914616 / 250702618).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 270.3, Dec = 1.4 (J2000 degrees, equivalent to J2000 18h 01m, 1d 23'), with a statistical uncertainty of 12.7 degrees.
The angle from the Fermi LAT boresight is 68.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250702618/quicklook/glg_skymap_all_bn250702618.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/bn250702618/quicklook/glg_healpix_all_bn250702618.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250702618/quicklook/glg_lc_medres34_bn250702618.gif