LIGO/Virgo S190521g: No counterpart candidates in AGILE-MCAL observations. Casentini, C. ; Verrecchia, F. ; Tavani, M. ; Cardillo, M. ; Piano, G. ; Ursi, A. ; Lucarelli, F. ; Pittori, C. ; Bulgarelli, A. ; Parmiggiani, N. ; Pilia, M. ; Longo, F. Abstract Publication: GRB Coordinates Network Pub Date: 2019 Bibcode: 2019GCN.24623....1C