help with DOPCOR

starburst84 wrote on Jul 10, 2008

I have muti-dimensional data file created for all objects in a single mask. How can i correct different apertures for different redshifts?

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Mike Fitzpatrick wrote on Jul 10, 2008

Is your multi-dimensional data file text or an image? What's is in the data file exactly? Is your data file the mask or is it data about what's in a mask? fWhat kind of 'correction' is it you're looking to apply? What do you mean by 'aperture'?

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starburst84 wrote on Jul 10, 2008

sorry, i should have made this clearer. The multi-dimensional data file contains spectra in band 1 (which is of my concern) and some other information like reference spectra, uncleaned spectra etc. in others. Each aperture/line corresponds to a different object.

The question really is how can i use dopcor to correct these spectra for redshift.

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starburst84 wrote on Jul 10, 2008

and also to clarify, the data file is in fits format.

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Mike Fitzpatrick wrote on Jul 10, 2008

The 'apertures' parameter can be used to select specific apertures for each redshift, to apply different redshifts to different apertures you would need to run the task repeatedly for each redshift (possibly in a script). Note also the SCOPY task can be used to copy out specific apertures to a separate file, you could then apply a redshift to a list of these files as needed.

-Mike

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Last post on Jul 10, 2008