CF Gru outburst ASAS-SN detection. Apparent SU UMa-type DN, but we have not successfully determined the superhump period. CFGru 21:41:22.95 -45:04:31.19 18.86 2017/05/17 07:52 57890.328160000034 15.65 16.31 57230.14385 GRUCF 20170517.328 15.65V ASN