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GCN Circular 35217

Subject
GRB 231129C: Fermi GBM Final Real-time Localization
Date
2023-11-29T19:39:45Z (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 19:10:18 UT on 29 Nov 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231129C (trigger 722977823.114938 / 231129799).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 2.0, Dec = -81.5 (J2000 degrees, equivalent to J2000 00h 08m, -81d 30'), with a statistical uncertainty of 1.0 degrees.

The angle from the Fermi LAT boresight is 50.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231129799/quicklook/glg_skymap_all_bn231129799.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/bn231129799/quicklook/glg_healpix_all_bn231129799.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231129799/quicklook/glg_lc_medres34_bn231129799.gif


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