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GCN Circular 34256

Subject
GRB 230725B: Fermi GBM Final Real-time Localization
Date
2023-07-25T13:08:51Z (10 months ago)
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 12:58:19 UT on 25 Jul 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230725B (trigger 711982704.317538 / 230725540).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 30.2, Dec = 47.8 (J2000 degrees, equivalent to J2000 02h 00m, 47d 47'), with a statistical uncertainty of 1.0 degrees.

The angle from the Fermi LAT boresight is 2.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230725540/quicklook/glg_skymap_all_bn230725540.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230725540/quicklook/glg_healpix_all_bn230725540.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230725540/quicklook/glg_lc_medres34_bn230725540.gif


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