TITLE: GCN CIRCULAR NUMBER: 40784 SUBJECT: GRB 250619A: Fermi GBM Final Real-time Localization DATE: 25/06/19 15:25:10 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 15:14:36 UT on 19 Jun 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250619A (trigger 772038881.892868 / 250619635).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 35.1, Dec = 27.0 (J2000 degrees, equivalent to J2000 02h 20m, 27d 00'), with a statistical uncertainty of 3.9 degrees.
The angle from the Fermi LAT boresight is 40.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250619635/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/bn250619635/q...
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250619635/q...
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