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Isis, comparer avec spectre de référence
Posted: Tue Jul 25, 2017 7:37 am
by 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?
Re: Isis, comparer avec spectre de référence
Posted: Tue Jul 25, 2017 3:16 pm
by 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 4231 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
Re: Isis, comparer avec spectre de référence
Posted: Tue Jul 25, 2017 8:05 pm
by Gerard Arlic
Thank you Robin
I will resume the spectral calibration
This is probably where I was wrong
Re: Isis, comparer avec spectre de référence
Posted: Tue Jul 25, 2017 11:52 pm
by 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
