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I am checking the absolute calibration of my LHIRES at H alpha but I am finding a ~10km/s offset between the ELODIE spectrum c_Vega.fit in the ISIS database and my reduced spectra (calibration checked using tellurics and heliocentric corrected using ISIS) The fits header does not include any observation details so I do not know if the database spectrum is heliocentric or not.

Cheers
Robin

Hi Robin,

here it says, that the spectra are in the topocentric reference frame, so without heliocentric correction:
http://www.obs-hp.fr/archive/elodie-for ... ml#archive

Greetings from OHP, right at the source of these spectra,

Martin

Thanks Martin,

I knew the spectra come out of the archive uncorrected but I wondered if Christian might have corrected them before including them in the database (There is no carried over observation date in the header so it cannot be corrected subsequently). I took another one from the archive and corrected that. My corrected spectra line up well with it so am happy that all is working ok

Clear Skies to everyone down at OHP and say hello to ELODIE 's younger sister SOPHIE who was only a baby when I was last at OHP

Robin