[Aavso-photometry] UBV Photon Counting

[Richard Miles]

Jeff,

Your UBV observations of BET PER and write up on your webpage at:

http://www.hposoft.com/Astro/PEP/algol.html

is most impressive and very enjoyable to read.  Well done.

Like you I started EPS AUR observtions in 1982 but unlike you I did not 
think to keep measuring its out-of-eclipse characteristics ahead of the next 
(2009) eclipse - nice paper on this.

I should be getting a filter wheel for my main scope later this year so I 
shall have to make sure I get a U filter.  However I am very doubtful of its 
efficacity because unlike the 1P21 phototube, the red leak will really wreck 
the true U signal when measured by a CCD.  If I remember, the advice was to 
include a copper sulphate window to block the IR side - now there's a 
challenge!

I wonder if anyone else on this list is doing U photometry (successfully) 
with a CCD camera?

Richard