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RE: NSVS/TASS/ASAS

Michael,

You write:

> I didn't plot the error bars but the average errors are:
>
> NSVS   0.010
> TASS   0.003
> ASAS   0.040
>

Uhhh!  Where do you get average errors of 0.003 for the tass data?  You are
possibly looking at the photon statistics column.  This is only a lower
limit on the error.  The actual error can be much larger.

Tom Droege


> [Original Message]
> From: Michael Koppelman <lolife@bitstream.net>
> To: tass List <tass@listserv.wwa.com>
> Date: 6/6/2004 6:35:31 PM
> Subject: 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
>