Date: Mon, 13 Mar 2006 09:19:16 -0600
From: Richard Huziak <huziak
	rv:1.0.2) Gecko/20030208 Netscape/7.02
References: <441312B5.4040909

Erwin et al.

NE.....).   I don't have an older Z Tau chart handy, but I seem to 
remember this was discussed during the chart upgrade.  Hopefully that 
note is sufficient, though you don't always read all the notes on the 
charts when at the scope.  Hopefully everyone is using the newest 
some into estimating the combined magnitute of the faint 'double star' 
formed when Z Tau is about as bright as the companion.  I'll stick a 
comment into the chart error page to physically add the companion to the 
chart to make this situation more visual.

rick

Erwin van Ballegoij wrote:

> When I took a look at the Z Tau lightcurve today, I noticed the wide 
> flat bottom in the lightcurve around magnitude 14. At the same time 
> the lightcurve shows fainter than magnitude 16 observations as well. 
> Because of this feature, I decided to take a good look at the 
> magnitude star very close to the Z Tau position, not present on any of 
> the other charts. I am afraid that many visual observers think this 
> star is Z Tau, therefore the lightcurve shows a broad minimum of 14th 
> magnitude. So take care that you see both the nearby magnitude 14 star 
> and Z Tau when observing this variable.
>
> Clear Skies,
>
> Erwin van Ballegoij (BVE)
>
> _______________________________________________
>