Classifying GRB170817A / GW170817 in a Fermi duration - hardness plane

I. Horvath, B. G. Toth, J. Hakkila +5

GRB170817A, associated with the LIGO-Virgo GW170817 neutron-star merger event, lacks the short duration and hard spectrum of a Short gamma-ray burst (GRB) expected from long-standi…