Robin said: ” I think for relative flux calibrated H alpha spectra, most of the time IR correction of a narrow wavelength range at high resolution is a waste of good observing time.”
Yes – this had been my assumption, albeit based on a hunch rather than any evidential basis…
Uisng ‘precedent and custom’ as the criterion, my encounters with the litertature seem to show rectified data in almost all cases.
Cheers
Kevin