linespec is an IRAF task in the rvsao package which creates a spectrum from a set of absorption or emission line positions. This spectrum is written into a one-dimensional IRAF image file which is linear in wavelength.

The resulting spectrum can them be used by xcsao to find redshifts from spectra by cross-correlating them against it following the method of Tonry and Davis 1979, A.J., 84, 1511).



Cursor Commands


Galaxy Emission Template at Zero Redshift

Last updated September 20, 2019 by Jessica Mink

Telescope Data Center [rvsao] [xcsao] [emsao] [sumspec] [linespec]