GRB 250723B
GCN Circular 41142
Subject
GRB 250723B: Fermi GBM Final Real-time Localization
Date
2025-07-23T14:56:17Z (3 months 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 14:45:37 UT on 23 Jul 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250723B (trigger 774974742.499166 / 250723615).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 358.0, Dec = 50.6 (J2000 degrees, equivalent to J2000 23h 52m, 50d 36'), with a statistical uncertainty of 3.1 degrees.
The angle from the Fermi LAT boresight is 114.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250723615/quicklook/glg_skymap_all_bn250723615.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/bn250723615/quicklook/glg_healpix_all_bn250723615.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250723615/quicklook/glg_lc_medres34_bn250723615.gif