V2276 Sgr outburst (AM CVn?)

Combined ATLAS+ASAS-SN(ver2) data indicate that this object is clearly a dwarf nova. The 2022 Sep. and 2021 Aug. outbursts showed a dip and rebrightening resembling an AM CVn star. Supercycle is 80-100 d. The object may be similar to MASTER OT J055845.55+391533.4 or MASTER OT J172758.09+380021.5 (see VSOLJ Variable Star Bulletin No. 113). The spectral type DC:, however, by Skiff (see AAVSO VSX) would favor a hydrogen-poor object. The current outburst appears to be a superoutburst and time-resolved photometry is encouraged.

YYYYMMDD(UT) mag observer 20230705.8343 <16.309g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.8535 <16.794g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230707.3509 15.533g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230707.4367 15.660g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230708.3381 15.626g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230709.1767 15.869g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))