We report K2 observations of the eclipsing cataclysmic variable V729 Sgr which covered nearly 80 days in duration. We find five short outbursts and two long outbursts, one of which shows a clear plateau phase in the rise to maximum brightness. The mean time between successive short outbursts is ~10 d while the time between the two long outbursts is ~38 d. The frequency of these outbursts are unprecedented for a CV above the orbital period gap. We find evidence that the mid-point of the eclipse occurs systematically earlier in outburst than in quiescence. During five of the six quiescent epochs we find evidence for a second photometric period which is roughly 5 percent shorter than the 4.16 h orbital period which we attribute to negative superhumps. V729 Sgr is therefore one of the longest period CVs to show negative superhumps during quiescence.
@article{arxiv.1704.01076,
title = {V729 Sgr: A long period dwarf nova showing negative superhumps during quiescence},
author = {Gavin Ramsay and Matt A. Wood and John Cannizzo and Steve Howell and Alan Smale},
journal= {arXiv preprint arXiv:1704.01076},
year = {2017}
}