GCN 45788: GRB 260930A: Fermi GBM Final Real-time Localization
2026-09-30T20:09:49.063Z | rev 3
The Fermi GBM team reports the detection of a likely LONG GRB
At 19:59:09 UT on 30 Sep 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260930A (trigger 812491154.688938 / 260930833).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 175.2, Dec = -7.3 (J2000 degrees, equivalent to J2000 11h 40m, -7d 17'), with a statistical uncertainty of 8.1 degrees.
The angle from the Fermi LAT boresight is 61.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260930833/quicklook/glg_skymap_all_bn260930833.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260930833/quicklook/glg_healpix_all_bn260930833.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260930833/quicklook/glg_lc_medres34_bn260930833.gif
GCN 45788: GRB 260930A: Fermi GBM Final Real-time Localization
2026-09-30T20:09:49.063Z | rev 3
The Fermi GBM team reports the detection of a likely LONG GRB
At 19:59:09 UT on 30 Sep 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260930A (trigger 812491154.688938 / 260930833).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 175.2, Dec = -7.3 (J2000 degrees, equivalent to J2000 11h 40m, -7d 17'), with a statistical uncertainty of 8.1 degrees.
The angle from the Fermi LAT boresight is 61.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260930833/quicklook/glg_skymap_all_bn260930833.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260930833/quicklook/glg_healpix_all_bn260930833.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260930833/quicklook/glg_lc_medres34_bn260930833.gif