Filter down A comma-separated list of the lower-frequency component of the bandwidth. Filter up A comma-separated list of the upper-frequency component of the bandwidth. Observed spectral lines A comma-separated list of the observed spectral lines. More options Phot-z Can be set to include the phot-z image, assuming an error of dz / (1+z_spec) ~ 0.13. Figure width Figure height Figure size parameters. Redshift up Redshift down Lower- and upper-redshift bounds on the figure. Correlated filters (as is typical for heterodyne instruments) Single line color Multi line color Number of CO lines The number of CO lines you wish to plot. DZ uncertainty Defined as (delta z)/(1+z), influencing the photometric redshift bullet.