Isis, comparer avec spectre de référence

[Gerard Arlic]

Bonjour,
sur Véga, (StarAnalyser+Atik383+T200/1000) j'ai obtenu ce profil:



lorsque je compare avec le spectre A0V de la base spectrale:



ma question: à part la copie d'écran, y-a-t-il la possibilité de sauvegarder le comparatif?
merci

question subsidiaire (mais qui n'a rien à voir )
ce spectre de T-Lyrae vous paraît-il cohérent?

[Robin Leadbeater]

Bonjour Gerard,

Your Star Analyser spectra look good but I think the wavelength calibration for T Lyr is not quite right.
Your wavelength values look ~ 7% too high when I compare with my 2008 Star Analyser spectrum,

T_Lyr_SA100_2008.png (14.42 KiB) Viewed 4224 times

from this page
http://www.threehillsobservatory.co.uk/ ... poster.pdf

and with Christian Buil's spectrum
http://www.astrosurf.com/buil/us/spectro9/tlyr.gif
from this page
http://www.astrosurf.com/buil/us/peculiar2/carbon.htm

Cheers
Robin

[Gerard Arlic]

Thank you Robin
I will resume the spectral calibration
This is probably where I was wrong

[Robin Leadbeater]

Hello Gerard,

Your Vega wavelength calibration is good so you can use the same calibration for T Lyr. Use the position of zero order (= 0 Angstrom) and the same dispersion (A/pixel) that you found for Vega.

You can see an example of this using Visual Spec in this presentation (slides 36-46)
http://www.threehillsobservatory.co.uk/ ... p_2008.pdf

Cheers
Robin