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Marc,
Perhaps the difference between our spectra is due to the fact that you use Angstrom units and I use nanometers so a factor of 10 out.
Ernst take note but I am sure you account for this when combining our results.
Regards,
Jack
Essex UK
Marc,
I am using a 23 micron slit as opposed to 35 micron.
So would the difference in slit width account for changes in the baseline ?
The weather here in the UK is not good.
Regards,
Jack
Essex UK
Attached is last nights 2017-07-25 result.
Still no change in the V H alpha emission line.
Regards,
Jack
Essex UK
Well done, good work and congratulations to Marc and Richard.
I know just how much time and effort goes into a book or two.
I will be ordering copies in due course.
Regards,
Jack
Essex UK
Author A Spectroscopic Atlas of Bright Stars
Co-author Practical Amateur Spectroscopy
Dave,
I have the Vixen 2.1 excellent BUT you need 2 things good skies and good vision they are not suitable with a spectacle prescription of for example +6.75. They are best used without specs but are adjustable to about +/- 5. The manufacturers don’t bother to tell you !
Do not buy the cheaper version(s).
Jack
Huggins Spectroscopic Observatory UK
Ernst,
Welcome aboard.
I look forward to future collaboration in Spectroscopy.
Regards,
Jack
Essex UK
Ernst,
My baseline of observations start from 2105-08-26 to date, a long term study, I intend to contribute scientifically useful data.
Regards,
Jack
Essex UK
John,
I contacted a Professional astronomer and good friend Professor Steve Shore who has provided the following information which we hope will answer your question.
There is also another document which I can’t upload so will send you an e mail.
http://rredc.nrel.gov/solar/spectra/am1.5/ASTMG173/ASTMG173.html
https://arxiv.org/pdf/1405.4780.pdf
http://adsabs.harvard.edu/abs/2010A&A…523A..57V
Regards,
Jack
Huggins Spectroscopic Observatory UK
Andy,
I will check the FITS header fields.
Just checked MaximDL and its definitely a FITS file all saved as .fit files.
The bias dark and flat field processing were followed in accordance with John Blackwells tutorials.
Regards,
Jack
A group photo taken by Janice through my camera.