Re: more GSC 748-1618

[Arne Henden <aah@nofs.navy.mil>]

Doug,
   I don't think anyone has ignored your suggestion; as far
as I can remember, no one has suggested a classification
for the star that has stuck, except that it appears to
be some kind of pulsator.
   My memory also says that most overtone pulsators have
"clean" light curves without bumps.  Most of the bumpy
ones are popII stars like W Vir and SX Phe stars.  Michael's
light curves are starting to look more like these to me,
or even just an RRab star.
   I don't recall any classical cepheids with this short of
period (the normal classification sez ~2day period and longer).
Arne

Doug Welch wrote:
> Mike,
> 
> I am a little curious why people have decided to ignore
> my suggestion that this is a short-period, overtone
> Cepheid. Perhaps it wouldn't seem so strange then!
> 
> Cheers,
> Doug
> 
> On Sat, 1 Mar 2003, Michael Koppelman wrote:
> 
> 
>>Check out the light curves on this page:
>>
>>http://www.lolife.com/astronomy/gsc748-1618/
>>
>>There is an unusual shape to the I-band curve.
>>
>>All of this data is less than 3 months old, so it's hard to believe the 
>>period could be changing that fast. Since the V-band curve has some 
>>weirdness in the same spot, it seems real so far to me.
>>
>>On this plot:
>>
>>http://www.lolife.com/astronomy/gsc748-1618/gsc748-1618_ibin.jpg
>>
>>...I adjusted my curve by 0.018m to match Arne's.
>>
>>Michael Koppelman
>>
>>
> 
> 
> ==============================================================
>  Douglas L Welch     | Office/voicemail (905) 525-9140 x23186  
>  Physics & Astronomy | FAX              (905) 546-1252 
>  McMaster University | 
>  Hamilton, Ontario   | 
>  Canada L8S 4M1      | E-mail       welch@physics.mcmaster.ca
> ==============================================================
> 
> 
> 
>