Find velocity in km/s

[detoma]

To convert doppler shift to velocity in km/s, shall we use 1074.62 to 1074.70 to compute the conversion factor? This is the same conversion factor used for line width. It is a small difference but still, should look into that. I lean toward using the nominal wavelength for the line that is 1074.70 and is what we use in UCoMP.

@jburkepile Need Joan input on this.

We should not call comp_doppler_correction to compute the rest wavelength but the new method (still TBD) that uses east and west.

Questions

• [x] Is 1074.62 or 1074.70 the "nominal wavelength" for velocity and line width calculations? Use 1074.680 and 1079.795

Tasks

• [ ] remove any calls to comp_doppler_correction
• [x] update "nominal wavelength" for 1074 in velocity and line width calculations

[detoma]

This is a very small effect.

Let's use the nominal wavelength for the two lines in air as reported in Del Zanna & De Luca 2018 (based on Lyot measurements) and close the ticket:

1074.680

1079.795