GCN Circular 39126
Subject
GRB 250202C: Fermi GBM Final Real-time Localization
Date
2025-02-02T20:18:40Z (8 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 20:10:35 UT on 2 Feb 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250202C (trigger 760219840.823694 / 250202841).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 300.9, Dec = -54.5 (J2000 degrees, equivalent to J2000 20h 03m, -54d 30'), with a statistical uncertainty of 4.0 degrees.
The angle from the Fermi LAT boresight is 25.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250202841/quicklook/glg_skymap_all_bn250202841.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/bn250202841/quicklook/glg_healpix_all_bn250202841.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250202841/quicklook/glg_lc_medres34_bn250202841.gif