Re: NSVS/TASS/ASAS

[Patrick Wils <patrickwils@yahoo.com>]

--- Michael Koppelman <lolife@bitstream.net> wrote:
> 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

One point one has to keep in mind when using NSVS data: one has to
check the "APINCOMPL" flag in the query form.  Data with this flag set
is bad and usually way off, and should not be used (luckily, not every
star has data with this flag set).  The value of "mask" (in the URL to
get at the data) will be 32020 instead of the default 32004.

Patrick




	
		
__________________________________
Do you Yahoo!?
Friends.  Fun.  Try the all-new Yahoo! Messenger.
http://messenger.yahoo.com/