A narrow band O filter was used for the uCAC survey. Possibly that's why
CCDO was introduced.
Mind you, this filter is extremely suited for up there to count up the
number of working LPS (Low Pressure Sodium) lamps on the streets...
Berto Monard
----- Original Message -----
Sent: Wednesday, July 09, 2003 9:55
AM
Subject: [vsnet-chat 6676] Re: (fwd) to V
or not to V - I couldn't resist it
Re: (fwd) to V or not to V - I couldn't resist it
>
That may be the reason the AAVSO has that "CCDO" magnitude-type.
:-)
To my eyes, the standard Rc filter (tuned for our CCD)
looks orange :-) Regards, Taichi Kato
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