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chewbacca |
07/27/2014 11:47AM (Read 837 times)
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Status: offline
Registered: 07/17/2014
Posts: 14
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Hi,
I am using splot to fit doppler shift in absorption lines that are very weak, so I would like to take advantage of the 'single' option in the deblending routine.
However, my lines are separated by ~150 nm so Delta(lambda) can vary quite a lot between different lines given that the redshift z = Delta(lambda)/lambda should be the same.
Is the a reason why the routine tries to fit a constant delta(lambda) instead of a constant redshift? Is there a workaround to this?
Thanks!
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fitz |
07/27/2014 04:21PM
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Status: offline
Registered: 09/30/2005
Posts: 4040
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I don't know if there's a reason other than it is simpler to do, however if you rebin the spectrum (e.g. with DISPCOR) to a log-linear scale then delta-lamda will be constant across the spectrum.
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chewbacca |
07/28/2014 07:44AM
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Status: offline
Registered: 07/17/2014
Posts: 14
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That is a very ingenious solution! Thanks!
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