GCN Circular 39112
Subject
GRB 250201A: Fermi GBM Final Real-time Localization
Date
2025-02-01T10:10:18Z (9 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 09:59:46 UT on 1 Feb 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250201A (trigger 760096791.667376 / 250201417).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 115.8, Dec = -52.6 (J2000 degrees, equivalent to J2000 07h 43m, -52d 36'), with a statistical uncertainty of 1.1 degrees.
The angle from the Fermi LAT boresight is 17.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250201417/quicklook/glg_skymap_all_bn250201417.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/bn250201417/quicklook/glg_healpix_all_bn250201417.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250201417/quicklook/glg_lc_medres34_bn250201417.gif