TITLE: GCN CIRCULAR NUMBER: 39112 SUBJECT: GRB 250201A: Fermi GBM Final Real-time Localization DATE: 25/02/01 10:10:18 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM do_not_reply@GIOC.nsstc.nasa.gov
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/q...
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/q...
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250201417/q...
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