[vsnet-chat 4185] DK CAM hipep.. THANKS!

[Kari Tikkanen <ktikkane@mail.student.oulu.fi>]

>From: crawl@zoom.co.uk
>Date: Tue, 10 Apr 2001 21:23:51 +0000
>To: ktikkane@mail.student.oulu.fi, vsnet-chat@kusastro.kyoto-u.ac.jp
>Subject: DK Cam hipep

>Okay, 
>
>Here's the Hipparcos Epoch Photometry data for the Hipparcos discovered
>variable DK Cam = HIP 20779.
>
>The first part is the "header" which is used to explain the data held in
>the catalogue... ...this is standard format for HIP EP and if you search
>the web pages you used for the HIP lightcurve you should be able to find
>instructions if you're confused.  Columns are separated by the |
character
>[again, standard].
>
>Column HT1 is the Barycentric Julian Date of observation, which is very
>little different from HJD; HT2 is the Hipparcos Photometric Magnitude
[Hp];
>HT3 is the standard deviation on the magnitude; HT4 is probably the
>background noise level or something... ...basically the data is not good
if
>HT4 is large.
>
>Actually, the estec website should also carry an interactive "form" that
>allows you to access this sort of data for any particular HIP star
>interactively online [you have to know the HIP number].
>
>With regards the period, if Chris Lloyd is still out there, he may well
be
>able to get at a period for you using both your data and the Hipparcos
>Epoch Photometry, but I'll leave that up to Chris.
>
>Incidentally, Tycho Epoch Photometry is probably also available, which
>carries two colours [BT-VT], which may be informative if this is an
eclipser.
>
>Cheers
>
>John
>
>John Greaves
>UK
...

OHHH! Thanks a lot !!!
Great !!!

You also "pushed" me to find this wonderful treasure
*http://astro.estec.esa.nl/Hipparcos/apps/PlotCurve.html

DK CAM is marked EA.

Also DE DRA is EA but
I've found also strange ~ 90 d cycle, 
DE DRA or its compare reddish star varies. 

With Best Regards,
 Mr. Kari A. Tikkanen
 http://vsnet.student.oulu.fi/~ktikkane/astrov.html

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