CRTS J070517.5+420548: possible AM CVn star The 2021 Jan.-Feb. long outburst looks like an AM CVn-type superoutburst (ZTF + VSNET reports). Dip in the middle. Another outburst (relatively long) in 2018 Mar. AM CVn star with a supercycle of 3 yr? (See also vsnet-alert 25391).