2000A&A...364..701N

We report time-resolved photometric observations of the Hamburg Quasar Survey-selected dwarf nova HS 1449+6415 (= RXJ1450.5+6403) during the interval from JD 2451672 to 2451724. During a long outburst with a duration of ∼12 days, we detected superhumps with a period of 0.0601(5)d, revealing that this star is an SUUMa star. A short outburst which lasted 3 days was found about 40 days after the onset of the superoutburst. From quiescence observations, we determine an orbital period of 0.05898(2)d. The small outburst amplitude of ∼3.5mag, the short orbital period, and the normal outburst cycle length suggest that HS 1449+6415 is an intermediate object between ER UMa stars with high mass-transfer rates and WZSge stars with very low mass-transfer rates.