GCN Circular 44670

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

"At 03:37:41.37 UT on 19 May 2026, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 260519B (trigger 800854666/260519151).

The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 85.76, Dec = -73.67 (J2000 degrees, equivalent to J2000 -4h 54m, +17d 0'),
with a statistical uncertainty of 17.01 degrees.

The angle from the Fermi LAT boresight is 25 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260519151/quicklook/glg_skymap_all_bn260519151.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/bn260519151/quicklook/glg_healpix_all_bn260519151.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260519151/quicklook/glg_lc_medres34_bn260519151.gif"