TITLE:   GCN CIRCULAR
NUMBER:  34907
SUBJECT: GRB 231030A: Fermi GBM Final Real-time Localization
DATE:    23/10/30 00:18:11 GMT
FROM:    Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>

The Fermi GBM team reports the detection of a likely LONG GRB

At 00:07:34 UT on 30 Oct 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231030A (trigger 720317259.119418 / 231030005).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 46.8, Dec = 49.1 (J2000 degrees, equivalent to J2000 03h 07m, 49d 06'), with a statistical uncertainty of 16.3 degrees.

The angle from the Fermi LAT boresight is 71.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231030005/quicklook/glg_skymap_all_bn231030005.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/bn231030005/quicklook/glg_healpix_all_bn231030005.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231030005/quicklook/glg_lc_medres34_bn231030005.gif