Curious Variables Experiment: SDSS J210014.12+004446.0 - dwarf nova with negative and positive superhumps

Abstract

We report the results of 67 h of CCD photometry of the recently discovered dwarf nova SDSS J210014.12+004446.0 (SDSS J2100). The data were obtained on 24 nights spanning a month. During this time, we observed four ordinary outbursts lasting about 2-3 days and reaching an amplitude of 1.7 mag. On all nights, our light curve revealed persistent modulation with the stable period of 0.081 088(3) days (116.767 0.004 min) and large amplitude of 0.5-0.6 mag in quiescence reduced to 0.1-0.2 mag during outbursts.