CKOSMOS-Comparison-Lamp-Spectra

This page contains comparision lamp spectra that are used for the wavelength calibration of COSMOS on the Blanco 4-m Telescope and KOSMOS on the Mayall 4-m Telescope.  General information on the COSMOS dispersers can be found on the COSMOS Disperser page.

Arc line lists were created for Hg, Ne, Ar, Cu, and He using information from National Institute of Standards and Technology (NIST) Atomic Spectra Database.  Promising transition lines were then chosen from those listed based upon the relative intensity of the line and the transition probability.  The lists for individual elements were merged for each available lamp.  The plots on this page were made by using the IRAF spectroscopic "Identify" task found in the NOAO.TWODSPEC.LONGSLIT package using the merged lists for HgNe, HgAr, and CuHeAr.  The final line lists for these plots can be found here.