[Aavso-photometry] ensemble photometry with Maxim

[Jim Jones]

Yengal

You will only have one column for the object.  That will the the
magnitude calculated from the composite of the reference stars.  Sounds
like it is working the way it should.

If you have filled in the value of the reference stars when you "tagged"
them, then MaxIm calculates the magnitude of the object star for you.

Calculating the error is a whole different subject and depends on what
type of star you are measuring and your personal preference.  If I am
measuring a long term variable, then I usually make 5 measurements of
the variable and take the standard deviation as the error.  If I am
doing a time series, then I go to the standard deviation of the check
star or in some cases the SNR.  If you use the SNR, you have to consider
the SNR of all the reference stars and the variable.  Lots of stuff in
the archives about calculating errors.

Jim Jones

Yenal Ogmen wrote:
> You wrote:
> "you should have one column for the JD, one column for
> the object and one column for each reference star. And
> in the case you describe you should have a column  for
> the check star."
>
> This is what I exactly have. So I dont do any mistake.
> I was thinking that I should have 3 columns of one
> object, one for each ref stars. Anyway, how can I
> calculate estimation for the object and error in this
> case? I am trying to understand the way software
> works. Is the column for object, calculated from 3 ref
> stars?
>
> Thank you.
>
>
>
> Yenal Öðmen
>   Green Island Observatory Homepage
> www.geocities.com/yenalogmen 
> Geçitkale 
> North Cyprus
>
>
>
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