GCN Circular 44888

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

"At 20:05:42.61 UT on 09 June 2026, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 260609A (trigger 802728347/260609837).

The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 42.43, Dec = -7.99 (J2000 degrees, equivalent to J2000 2h 49m, -7d 59'),
with a statistical uncertainty of 8.05 degrees.

The angle from the Fermi LAT boresight is 86 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260609837/quicklook/glg_skymap_all_bn260609837.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/bn260609837/quicklook/glg_healpix_all_bn260609837.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260609837/quicklook/glg_lc_medres34_bn260609837.gif"