Re: Analyzing Data

[Tom Droege <tdroege2@earthlink.net>]

Hmmm!  Re-reading the below, it would seem that the n I am using is more 
like 50.  The numbers I quote below for V are the dark subtracted and flat 
fielded median.  So I presume sigma would be SQRT(1500) for V or 38. (It is 
real life that a measured sigma is always higher) Thus a threshold of 3500 
is 2000 over the median or 52 sigma.

Hmmm!  possibly I should set it at 3 sigma and just live with nothing 
coming out of the end of the pipeline.  This is life in the burbs where my 
neighbors are always doing something with their lighting.  There are 
clearly many interesting things to explore.

I would appreciate guidance.

Tom Droege

At 01:56 PM 2/8/03 -0600, you wrote:
>Nomenclature is always a problem for me since I don't have enough contact 
>with the field to learn the language.
>
>Arne writes:
>
>>Are you rejecting all points
>>below <sky> + noise, or <sky> + n*noise?  The usual threshold is
>>something like n=3 for star finding