[Aavso-photometry] HD37605 data request

[Geir Klingenberg]

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