Wavelength Calibration: Line Lists and Identifications

Line Lists and Plots for each lamp

The following plots and line lists identify the wavelengths in units of Angstroms. Only lines positively identified in MODS comparison lamp spectra are listed. The wavelengths are taken from the NIST Handbook of Basic Atomic Spectroscopic Data and are wavelengths in air (not vacuum), according to the information on the NIST web pages which states that for wavenumbers smaller than 50,000 cm^-1, wavelengths are in air.

 

Disperser	Channel	Lamp	Line List	Plots
Grating	Blue	Hg(Ar)	hgar_blue.txt	3500-6000Å
		Ar	argon_blue.txt	3500-4500Å 4500-6000Å Full Range
		Xe+Kr	krypton_blue.txt xenon_blue.txt	3200-4450Å 4000-5600Å 4500-6000Å Full Range
		All	lineLists.tgz	blueLamps.tgz
	Red	Ar	argon_red.txt	5000-7000Å 7000-8500Å 8500-10500Å 6500-10000Å Full Range
		Ne	neon_red.txt	5000-6100Å 5600-7800Å 6800-9600Å 7800-9800Å Full Range
		Xe+Kr	krypton_red.txt xenon_red.txt	5000-6500Å 6500-7500Å 7500-10000Å 7500-10500Å Zoom Full Range
		All	lineLists.tgz	redLamps.tgz
Prism	Blue	HgAr	Hg(Ar)	λ	pixels
		Kr	Krypton	λ	pixels
		Xe	Xenon	λ	pixels
		All	prismLists.tgz	bluePrism.tgz
	Red	Ar(+HgAr)	Argon	λ	pixels
		Ne(+HgAr)	Neon	λ	pixels
		Kr	Krypton	λ	pixels
		Xe	Xenon	λ	pixels
		All	prismLists.tgz	redPrism.tgz

Line IDs for Composite Grating Spectra

Below are plots which identify prominent lines in the coadded Hg[Ar], Xe+Kr and Ar spectra for MODS1 Blue and in the coadded Ne, Xe+Kr and Ar spectra for MODS2 Red Grating modes. These are useful also for Dual Grating mode, for which the standard scripts take 3 images using a total of 5 lamps: Ne+Hg[Ar], Xe+Kr and Ar.  Below the MODS1 Blue Grating plot are two screenshots which zoom about the regions of the 3650.158 and 4916.507 (4916.608 was a typo) lines of Hg. 
 
The intensities of the individual lamps in MODS1 and MODS2 differ, leading to differences in the appearances of the composite lamp spectra from the two instruments. Therefore, below the MODS1 composite spectra are a set of plots which show the dual grating composite (Ne+Hg[Ar], Xe+Kr and Ar) spectra in pixel space, for both MODS2, first, and then for MODS1, in both blue and red channels.