[Aavso-photometry] Finding targets for a class....

[Roland Roberts]

I've just finished looking at _Variable Star Observations in an 
Introductory Astronomy Course_, (Gaskell, JAAVSO 20, p41) and am looking 
for my own small set of variables I can use for a similar purpose but 
doing CCD photometry.  I'm having a bit of trouble trying to search 
through catalogs to find suitable objects....

The criteria are *similar* to those of Gaskell.  The star should show 
variability with a period of 20-60 days, should be visible in a small 
scope (I'm using a 120mm f/5 achromat with an ST-7XE and BVRI filters), 
and have enough magnitude variability that it is easily detectable even 
with modest errors (say 0.05).   I can find things on the AAVSO site if 
I know the designation.  I can find things at the GCVS site if I know 
the type or designation.  But I'd really like to be able to filter the 
list quite differently than any of the searches I've found. 

Oh, and every time I think I found one on the GCVS site, I can't seem to 
find any data or charts at the AAVSO site :-(  These are the best as 
they are short period Cepheids, but they're examples of stuff I found at 
the GCVS site that I can't find in the AAVSO database: GV AUR, GT AUR, 
AM CAM.

Is there some way to search objects using period and variability?

roland

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Roland B. Roberts, PhD                             RL Enterprises
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roland at astrofoto.org                           Brooklyn, NY 11220