Comparison Atlases

Several old but useful HeAr and HeNeAr comparison line atlases.

These are scanned versions of older HeAr and HeNeAr comparison line atlases which have been used at CTIO for many years. The line ratios from our lamps have changed somewhat over the years, but these are still some of the best references available for identifying HeAr and HeNeAr lamp spectra from CTIO, at least until we get around to reproducing them from more recent spectra!

    HeAr, low resolution, 3800-7200A: GIF - PDF
    HeAr, med resolution, 3000-4100A: GIF - PDF
    HeAr, med resolution, 3800-5250A: GIF - PDF
    HeAr, high resolution, 4240-4620A: GIF - PDF
    HeNeAr, low resolution, 4900-9700A: GIF - PDF
    HeNeAr, med resolution, 5300-7000A: GIF - PDF
    HeNeAr, med resolution, 6700-8300A: GIF - PDF
    HeNeAr, med resolution, 8200-9800A: GIF - PDF

Last update: March 12, 2002
Chris Smith 
Knut Olsen