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GCN Circular 35252

Subject
GRB 231203A: Fermi GBM Final Real-time Localization
Date
2023-12-03T07:11:59Z (4 months 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 07:01:30 UT on 3 Dec 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231203A (trigger 723279695.772024 / 231203293).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 239.7, Dec = -49.8 (J2000 degrees, equivalent to J2000 15h 58m, -49d 47'), with a statistical uncertainty of 7.1 degrees.

The angle from the Fermi LAT boresight is 59.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231203293/quicklook/glg_skymap_all_bn231203293.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/bn231203293/quicklook/glg_healpix_all_bn231203293.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231203293/quicklook/glg_lc_medres34_bn231203293.gif


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