Ofsetting the lamp calibrated spectrum

Home Forums Spectroscopy What wavelength error is acceptable with an Alpy? Ofsetting the lamp calibrated spectrum

#580167
Robin Leadbeater
Participant

I like Andrew’s idea of calibrating using the lamp and then ofsetting the spectrum to match the star lines. This is similar to what is done with the LHIRES where telluric lines at H alpha are used to correct for any offset.  You would have to consider the RV of the star though and for highest accuracy perhaps the Heliocentric correction.

Cheers

Robin