GCN Circular 40817
Subject
GRB 250624A: Fermi GBM Final Real-time Localization
Event
Date
2025-06-24T19:46:55Z (a day 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 19:36:21 UT on 24 Jun 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250624A (trigger 772486586.849764 / 250624817).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 10.6, Dec = 16.6 (J2000 degrees, equivalent to J2000 00h 42m, 16d 36'), with a statistical uncertainty of 5.3 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/bn250624817/quicklook/glg_skymap_all_bn250624817.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/bn250624817/quicklook/glg_healpix_all_bn250624817.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250624817/quicklook/glg_lc_medres34_bn250624817.gif