P o S ( I C R C 2 0 1 9 ) 7 6 1 GRB observations with

14476 Potsdam, Germany 3Centre for Space Research, North-West University, Potchefstroom 2520, South Africa 4Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany 5IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France 6School of Physical Sciences, University of Adelaide, Adelaide 5005, Australia 7Institute of Astronomy and Space Science, Sun Yat-Sen University, Guangzhou 510275, China 8Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany 9DESY, D-15738 Zeuthen, Germany 10Instituto Nazionale di Fisica Nucleare 11Department of Physics and Astronomy, University of Leicester, University Road, Leicester,