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GCN Circular 35206

Subject
GRB 231128A: Fermi GBM Final Real-time Localization
Date
2023-11-28T11:54:40Z (3 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 11:44:10 UT on 28 Nov 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231128A (trigger 722864655.02195 / 231128489).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 194.1, Dec = -44.5 (J2000 degrees, equivalent to J2000 12h 56m, -44d 30'), with a statistical uncertainty of 7.4 degrees.

The angle from the Fermi LAT boresight is 85.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231128489/quicklook/glg_skymap_all_bn231128489.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/bn231128489/quicklook/glg_healpix_all_bn231128489.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231128489/quicklook/glg_lc_medres34_bn231128489.gif


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