ISIS database- are high res spectra heliocentric?

Design, construction, tuning of spectroscopes
Information and discussion about softwares (telescope remote, autoguiding, acquisition, spectral processing ...)
Post Reply
Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
Contact:

ISIS database- are high res spectra heliocentric?

Post by Robin Leadbeater »

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
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Martin Dubs
Posts: 141
Joined: Fri Jan 06, 2012 9:16 pm
Location: Maienfeld, Switzerland

Re: ISIS database- are high res spectra heliocentric?

Post by Martin Dubs »

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
Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
Contact:

Re: ISIS database- are high res spectra heliocentric?

Post by Robin Leadbeater »

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 :lol:

Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Post Reply