LIGO/Virgo S190425z: No i-band detection of the Swift/UVOT transient in SkyMapper observations. Chang, S. -W. ; Wolf, C. ; Onken, C. A. ; Luvaul, L. ; Scott, S. Abstract Publication: GRB Coordinates Network Pub Date: 2019 Bibcode: 2019GCN.24325....1C