[vsnet-campaign-dn 16414] ZTF J181732.64+101954.5: ER UMa + Z Cam + IW And

ZTF J181732.64+101954.5: ER UMa + Z Cam + IW And

From ZTF data. Supercycle about 56 d before 2020 May. Then long standstill. ER UMa state e.g. 2019 July-Sep. (normal outbursts + superoutburst). In 2019 Mar.-June, two superoutbursts occurred directly from a standstill (like NY Ser), but with the same supercycle. Superhumps with a period of 0.08881(4) d (0.13 mag) were detected during the 2019 June-July superoutburst. IW And state (dip following superoutburst) was recorded in 2018 Mar.-July.