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[vsnet-ip 13] Re: [vsnet-campaign 572] TV Col outburst: observations needed! -why?
Dear Dr. Kato,
What's the motivation for the observations? This behaviour of TV Col is
well known (Szkody \& Mateo 1984; Schwartz et al. 1988; Hellier \& Buckley
1993; Augusteijn et al. 1994). These are only fast (less than 1-d)
mini-outbursts (1-2 mags). They are most likely mass transfer events.
TV Col has almost certainly returned to its normal brightness by now
(or will do it by tomorrow). If the outburst continues for long, then
observations are really important, but it is unlikely. I also note that
the negative superhumps and the evidence for positive superhumps appeared
during the faint normal state.
Regards,
Alon
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Dr. Alon Retter Tel. (work) +44-(0)1782-58-3493
Physics Dept. Fax (work) +44-(0)1782-711093
Keele University -----------------------------------
Staffordshire, ST5 5BG 'As a scientist I don't believe myself, so
U.K. why should I believe you?' (A.R. 1965-2085)
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On Wed, 6 Dec 2000, Taichi Kato wrote:
> TV Col outburst: observations needed!
>
> As reported by Rod Stubbings (vsnet-alert 5419) and Berto Monard
> (vsnet-alert 5420), the intermediate polar TV Col is in outburst (or
> in bright state). The last reported brightening was observed on
> 2000 Apr. 25 (reaching mv=12.1; vsnet-alert 4677, 4746), which experienced
> very rapid fading.
>
> Follow-up observations (esp. time-resolved photometry and spectroscopy)
> of the present outburst are very urgently needed. TV Col has an orbital
> period of 0.2286 d and the white dwarf spin period of 1911 s.
>
> Follow-up information will be provided in vsnet-ip. Detailed progress
> of observations should be sent to vsnet-campaign-ip.
>
> Regards,
> Taichi Kato
> VSNET Collaboration team
vsnet-adm@kusastro.kyoto-u.ac.jp
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