Forum Replies Created
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Posts
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Robin,
I will open your fits file in my other computer which has the appropriate program.
Regards,
Jack
Essex UK
Robin,
This was just a 300 s raw exposure uncalibrated, no dark or flat frames just to check if the h alpha line has changed.
Regards,
Jack
Essex UK
Robin,
The response I am waiting for is if you are able to do a comparison between the spectra obtained by Marc and my spectra, as taken with Marcs C11 and my C14.
Please refer to Marcs previous post for info.
Regards,
Jack
Essex UK
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.