[Aavso-photometry] RX AMD Color Index

[arne]

Steven Orlando wrote:
> Hello All,
> 
> Does anyone know what the color index of RX AND is?
> 
RX And, a nice Z Cam star, is the subject of our most
recent Variable Star of the Season (VSOTS) article:
http://www.aavso.org/vstar/vsots/1007.shtml

There are more than one color index; basically, any
combination of filters will create a color index.  My
guess is that the one Steve is referring to is (B-V),
and RX And has (B-V) = 0.11, very common for cataclysmic
binaries.  They tend to look like A-stars, especially
during outburst.  In quiescence, a few are considerably
redder, often due to the presence of the red donor star
but not exclusively.

Arne