[vsnet-chat 9395] PS1-3PIJ185013.38+242220.2 = DDE 163: unusual object (double outburst)

PS1-3PIJ185013.38+242220.2 = DDE 163: unusual object (double outburst)

Using ATLAS data, I noticed that the bright outburst in 2022 Mar.-Apr. was a double outburst peaking at 13.8 on Mar. 28, fading to mag 17 and 3-d outburst again. The overall feature is inconsistent with the suggested SU UMa-type classification. It resemble that of an AM CVn star but without clear rebrightenings (there was some hint of a fading tail). Other outburst were also unusual. The 2021 Feb. one had two peaks (ZTF+ATLAS) and there were other faint complex-shaped outbursts. There were past ZTF time-series data in quiescence without a particular period.