[Suggestion] Add PCA models of QSOs that cover longer wavelengths for telluric correction

[rudolffu]

Hi, I am using the pypeit_tellfit command to correct for the telluric absorption lines in a NIR spectrum of a z~1.4 QSO. While the command works with the parameter -p qso_pca_2200_5100.fits, the reconstructed PCA model only covers a small portion (restframe 2200-5100 AA) of the whole wavelength range (restframe ~ 4000-10000 AA). I wonder if it's possible to add another PCA model that covers the restframe optical-NIR (e.g. 4000-8000 AA) for better telluric corrections of the low-redshift QSOs. Thanks!

[profxj]

@freddavies -- is this already implemented?