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NSVS/TASS/ASAS

Here is another comparison of data from these surveys:

http://www.lolife.com/astronomy/hd192169.jpg

I didn't plot the error bars but the average errors are:

NSVS   0.010
TASS   0.003
ASAS   0.040

I checked to see if the TASS point near phase 0.6 where shifted one day  
in either direction and that didn't help them. They might just be bad  
points. The period looks pretty tight when you look at just the ASAS  
and NSVS data.

TASS page with links to data is here:

http://wiki.tass-survey.org/tass/view.do? 
nodeId=Tass&contentId=TassJ201309.8%2B102039

Michael Koppelman