GRB 190219A: CrAO and AbAO optical upper limit. Volnova, A. ; Nazarov, S. ; Schmalz, S. ; Inasaridze, R. Y. ; Pozanenko, A. ; Belkin, S. ; Mazaeva, E. ; Molotov, I. Abstract Publication: GRB Coordinates Network Pub Date: 2019 Bibcode: 2019GCN.23920....1V