Re: [vsnet-alert 2128] V793 Cyg Congratulations to Timo again! > There is however some unavoidable uncertainty: > the star lies in a crowd of mag 15 stars, and the current > astrometry is not very precise. So I would love a sharp > CCD image and/or improved astrometry of this star (asap). The coordinates of V793 Cyg looks fairly well determined by the effort of the Vatican team (the discoverer). There would be no problem in confusing between neibouring 15-mag stars. The problem is the faintness of the quiescence, which has hindered accurate astrometry using the POSS. Accurate astrometry to sub-arcsec order is very valuable. No outburst have been yet reported to VSNET before this. According to the discovery paper, V793 Cyg (= VV 62), showed rather infrequent outbrusts, the duty cycle (system above mag 15.0pg) is around 7%. Outbursts recorded: JD mpg duration 2429107 15.1 isolated plate 33330 14.8 (on 331) >2 33717 14.5 two plates 33739 15.9 continuation of 33717 outburst? decline at a rate of 0.33 mag/d recorded 34736 14.9 two plates 34975 15.5 >2 35788 14.4 two plates 35809-814 15.4 similar to 33739; speed of decline 0.30 mag/d Though it is not clear the outbursts on 33739 and 35809 are related to the 20-day preceding ones, this object may tend to show such "double outbursts". Considering the large outburst amplitude, this star will well deserve follow-up time-resolved photometry. Good target after observing V592 Her for esp. northern observers. We would love to hear any postive or negative results. Regards, Taichi Kato