[Aavso-photometry] Uncertainty

[Lenny Abbey]

Rich, you should ask this question on the AAVSO list:

"AAVSO Discussion" <aavso-discussion at mira.aavso.org>

They are the experts, though you may find some accurate information here.

Lenny



At 08:55 PM 11/19/2007, Richard Harvan wrote:
>Dear All,
>           I would like to get your opinion on my calculation of 
> uncertainty.  The procedure I am writing about calculates the 
> standard deviation of the variable and the check star.  These 
> values are then combined in quadrature with the stated uncertainty 
> of the photometry of the comp star and check star.  Is this a 
> reasonable method or am I going overboard.
>                     I saw in a textbook that the uncertainty of an 
> average was the standard deviation divided by the square root of 
> the sample size.  When I applied this to my data the calculated 
> value was much less than the stated uncertainty.  This seemed too 
> good to be true, so I have doubts about applying this to my 
> measurements.  What is your opinion?
>   Thanks for your help in advance.
>
>   Rich Harvan
>
>
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