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Andy,You mean like this, the latest ‘quick’ spectrum of vv cep taken around 22.00 hr 2017-08-10 revealing no changes in the h alpha profile yet.
Regards,
Jack
Essex UK
Andy,
In our last communication I measured the resolution and inserted it the fits file.
I have posted a png file of my latest ‘quick’ spectrum of the h alpha profile of vv cep.
Regards,
Jack
Essex UK
Marc,
I am awaiting Robins response on this one.
Also, just a minor point to resolve before I can upload spectra to the database.
Regards,
Jack
Essex UK
Marc,
I can send data to Robin for analysis who can post comparative results on this forum for the benefit of all.
Jack
Essex UK
Robin,
I am keen to submit my data for further analysis as suggested by Marc, BUT I use BASS not ISIS to do my data reduction.
Thank you for your input, any further comments welcome.
Jack
Essex UK
Marc,
I use Shelyak SE0002B Lhires III 4 position slit NOT the photometric slit as advised by Olivier Thizzy sometime ago.
Regards,
Jack
Essex UK
Hello all,
I would attach a calibration lamp spectrum.
But bigger than 2 MB is there any way round this ?
Regards,
Jack
Essex UK
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
A group photo taken by Janice through my camera.