[Aavso-photometry] Calculating flux from raw adu's?

[Michael Koppelman]

I think that is valid, of course depending on things like air mass, sky 
quality and such. If you are using standard IR filters you can use the 
relations from the Zombeck book, which I think come from Astrophysics 
Quantities, to transform standard magnitudes into flux. The book is 
Handbook of Space Astronomy and Astrophysics by Martin V. Zombeck.

Cheers,
Michael Koppelman
http://www.lolife.com/astronomy/



On Feb 8, 2005, at 4:04 PM, <mlfleenor at charter.net> wrote:

>
> While this is not directly related to photometry of stars I am hoping 
> someone can point me in the right direction or give helpful insight 
> regarding a terrestrial project.
>
> I have a standard NIr source that I would like to use to determine the 
> flux of an object that emits in the NIr. I have a passband filter for 
> the region of interest.
>
> Suppose I make a measurement of the standard and the object and use a 
> 250 pixel  area for the selection "aperture" in Maxim DL- can I simply 
> relate the two by measuring the raw adu's of each and relating the two 
> as a ratio? There are no extinction concerns and the source and sample 
> are of the same color.
>
> I am using an ST10XME with a 4" apochromatic objective. The sample 
> will be ~5 meters away.
>
> Please clue me in if I am making a big conceptual error :)
>
> Thanks,
>
> Mike
>
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