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GCN Circular 35162

Subject
GRB 231123A: Fermi GBM Final Real-time Localization
Date
2023-11-23T02:54:35Z (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 SHORT GRB

At 02:44:04 UT on 23 Nov 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231123A (trigger 722400249.776634 / 231123114).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 83.8, Dec = -19.6 (J2000 degrees, equivalent to J2000 05h 35m, -19d 36'), with a statistical uncertainty of 9.2 degrees.

The angle from the Fermi LAT boresight is 95.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231123114/quicklook/glg_skymap_all_bn231123114.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/bn231123114/quicklook/glg_healpix_all_bn231123114.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231123114/quicklook/glg_lc_medres34_bn231123114.gif


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