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V699 Oph: sudden period decrease Dear Colleagues, The VSNET Collaboration has received new data from Peter Nelson and Sano-san. The new data show smooth superhumps without a hint of secondary maxima. The new data now indicate a rather abrupt change in the superhump period during the past two days. The mean period up to now is 0.07022 d, but this should be treated as a simple average for the entire observing period. Further observations are decisively neede to see whether the superhump period change continues, or the change was a rather stepwise phenomenon. Although the moonlight may interfere, the object is worth observing even against the observing condition (see discussions in vsnet-campaign-ccd-discussion regarding the photometry software matters; you will probably get higher-precision data even under difficult conditions than what you may have thought). Regards, Taichi Kato VSNET Collaboration team
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