[Ifeffit] Merging data in Athena

George Sterbinsky GeorgeSterbinsky at u.northwestern.edu
Wed Feb 27 10:09:17 CST 2013

Hi Chris,

The reason that I have spectra with different point spacings is because I
felt that a given range of the spectrum was oversampled. That is to say,
all of the spectral features could be captured with less points. It is not
clear to me why merging two spectra, where one has more data points than
necessary, would not still reduce the noise and uncertainty of the
measurement. Could you elaborate on your concern?

Thank you,

On Wed, Feb 27, 2013 at 8:24 AM, Christopher Patridge
<patridge at buffalo.edu>wrote:

>  George,
> It seems rather unconventional to try and merge data which has different
> energy grid spacing?  I thought the main point of merging data is to reduce
> the noise and uncertainty of a measurement.  I am not sure how the exact
> method of merging data is implemented but I don't think it is fair to call
> this a bug as a result of a unique situation.  Could you or have you
> reinterpolate one spectrum?
> Chris Patridge
> ********************************
> Christopher J. Patridge, PhD
> NRC Post Doctoral Research Associate
> Naval Research Laboratory
> Washington, DC 20375
> Cell: 315-529-0501
> On 2/26/2013 6:55 PM, George Sterbinsky wrote:
>  I am writing to make you aware of what I believe to be a bug in
> (D)Athena.  To demonstrate the problem, I have attached a project file
> containing two groups. Both groups have the same energy range but were
> measured with slightly different point spacings. Attempting to merge the
> two groups results in Athena excluding one of the groups from the merge
> "for being too short."
>  Thank you,
> George
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