GCN Circular 35434
Subject
GRB 231230A: Fermi GBM Final Real-time Localization
Date
2023-12-30T01:39:51Z (9 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 01:29:10 UT on 30 Dec 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231230A (trigger 725592555.052228 / 231230062).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 240.7, Dec = 53.6 (J2000 degrees, equivalent to J2000 16h 02m, 53d 36'), with a statistical uncertainty of 5.2 degrees.
The angle from the Fermi LAT boresight is 157.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231230062/quicklook/glg_skymap_all_bn231230062.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/bn231230062/quicklook/glg_healpix_all_bn231230062.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231230062/quicklook/glg_lc_medres34_bn231230062.gif