NSV10934 very bright outburst!!
As reported by Rod Stubbings, NSV10934 is undergoing a very bright outburst!! This is the brightest outburst ever observed by the VSNET members; the outburst may be a superoutburst!!
NSV10934 030102.480 150 Stu.RASNZ OUTBURST RISING! NSV10934 030102.493 150 Stu.RASNZ " " NSV10934 030102.557 146 Stu.RASNZ " " NSV10934 030102.693 120 Stu.RASNZ BRIGHT! NSV10934 030102.767 119 Stu.RASNZ " "Attached is a call for observation issued on 2002 Dec. 17 (vsnet-campaign-dn 3141). Please make most urgent and intensive observations!
From the past history of outbursts of NSV 10934, the next outburst is expected to occur within a short time. Since the evolution of outbursts has been always very quick, timely observations (and alerts) are very keenly needed. The object is possibly an analogous object to HT Cam, which displayed multiple periodic oscillations during the outburst last year (see Ishioka et al. (2002) PASJ 54, 581; Kemp et al. (2002) PASP 114, 623). Please make urgent time-resolved photometry when it erupts!
NSV 10934 reference: Kato et al. (2002) A&A 396, 929.
Regards, Taichi Kato VSNET Collaboration team(vsnet-campaign-dn 3233)
NSV 10934 observation by Berto Monard
Berto Monard just sent time-series (4.6 hours) observations of NSV 10934 on Jan. 3. The object stayed at maximum during the observation. This observation makes the first-ever time-resolved photometry of NSV 10934 in outburst. Although there is no clear periodicity, there existed modulations up to 0.1 mag. Since the object was observed during the early stage of an outburst, these modulations may develop into superhumps. Please continue observing this object during the current rare, bright outbursting state!
Regards, Taichi Kato VSNET Collaboration team(vsnet-campaign-dn 3236) NSV 10934 outburst: data from Chris Stockdale
We have received the time-series data of NSV 10934 from Chris Stockdale. The observation covered an earlier part to Monard's observation.
At a first look, the light curve looks flatter than Monard's run, possibly suggesting that the modulations are growing(?).
Regards, Taichi Kato
NSV 10934: superoutburst of a new SU UMa-type dwarf nova!
Chris Stockdale has reported fully reduced time-series observation of NSV 10934 taken on January 4. The data clearly show superhumps with amplitude of ~0.15 mag. A preliminary period analysis has yielded a period of 0.0743(8) d, which is naturally subject to further refinement. The object is now firmly established to be an SU UMa-type dwarf nova. Congratulations, Chris! Monard's preceding observation must have caught the growing stage of the superhumps.
The period has also confirmed a suggestion that "the orbital period of NSV 10934 is expected to be slightly longer than that of HT Cam (86 min)" (Kato et al. 2002, A&A 396, 929), although a conparison with HT Cam would require further observations of both objects.
Regards, Taichi Kato VSNET Collaboration team
2003 January 6
Return to HomePage
Return to Daisaku Nogami's page