CF Gru outburst ASAS-SN detection. CRTS light curve suggests a dwarf nova. CFGru 21:41:22.95 -45:04:31.19 18.86 2015/04/19 08:35 57131.35796999978 16.02 16.19 57131.35942 GRUCF 20150419.358 16.02V ASN GRUCF 20150419.359 16.19V ASN