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Re: Wavelength Calibration [message #77043 is a reply to message #69965]

Sat, 23 July 2011 00:57

Nikola
Messages: 53
Registered: November 2009

Member

On Jul 22, 9:08 pm, Gray <grayliketheco...@gmail.com> wrote:
> Hi all,
>
> I've been beating my head against the wall trying to get this to work
> for two days... so I figured I'd head on over here and see if anyone
> could help.
>
> I'm trying to perform wavelength calibration for my near-infrared
> spectrum (2-2.4 microns). My tools:
>
> 1) A Neon-Argon arc lamp spectrum.
> 2) A list of NIR lines for Neon and Argon.
>
> Any suggestions? Thanks in advance!
>
> --Gray

Could you please specify more details? Is the observed spectrum in low
resolution so that you don't see the lines? Or the problem is that you
do not know the relative strengths of the Ne and Ar lines?

In principle, once you have the continuum normalized, you have to fit
only coefficients of polynomial: lambdareal = a+b*lambdaobserved
+c*lambdaobserved^2+... So, the problem can be linearized and the
least square method is applicable. For my purposes linear relation is
always sufficient, though my wavelength range is usually narrower.

Nikola

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[Message index]

		wavelength calibration By: sid on Fri, 19 February 2010 21:38
		Re: Wavelength Calibration By: Nikola on Sat, 23 July 2011 00:57
		Re: wavelength calibration By: rogass on Thu, 03 November 2011 13:05
		Re: wavelength calibration By: Brian Wolven on Tue, 01 November 2011 12:41
		Re: wavelength calibration By: Jeremy Bailin on Tue, 01 November 2011 12:24

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