[Aavso-photometry] HD37605 data request

[Geir Klingenberg]

Jean-Luc

I don't know of any with direct reference to astronomy and photometry,
but this is a nice source for practical data analysis:

http://www.itl.nist.gov/div898/handbook/eda/eda_d.htm

And this has some sections on measurement error:

http://nedwww.ipac.caltech.edu/level5/Leo/Stats_contents.html

Geir

On Sun, 02 Jan 2005 17:34:36 +0100, Jean-Luc <jeanlucla at wanadoo.fr> wrote:
> Geir,
> 
> Many thanks for your clear answer. If I may sill ask something : where can I
> find a book (or online ref) describing Data Analysis for astronomy -
> photometry purpose ? Any recommendation ?
> 
> Thanks again,
> Jean-Luc
> 
> 
> 
> Geir Klingenberg wrote: 
> On Sun, 02 Jan 2005 01:14:03 +0100, Jean-Luc <jeanlucla at wanadoo.fr> wrote:

> If I do not stack, and get a stddev for each serie, how is
> scintillation
taken into account ? and how do I calculate the final error ?
> 
Jean-Luc,

That's the nice thing, it is already accounted for. All error
> sources
are included in the standard deviation because it is based on the
> data
itself, it is just a numerical expression of the variation about
> a
mean. If one uses an approach based on SNR and scintillation one tries
to
> model the phenomenon causing the scatter and these models are based
on more
> or less valid assumptions. Also, SNR and scintillation are
just two of the
> error sources although probably two of the most
important ones.

You should
> get a lower std from your 17 data points than from your 170
initial data
> points. The reason to average your measurements is to
average, that is
> reduce, the errors from scintillation and other error
sources, and this is
> reflected in a lower std. So you can simply
report the std of your 17 data
> points as the final
> error.

Geir
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