Resolution killers in Slitless Spectroscopy
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- čas přidán 16. 06. 2024
- This video documents my learnings from finding, and resolving, resolution limitations of my "slit less" converging beam astro spectroscopy setup. I increased my resolution from 87 to 320 with just minor, but important, tweaks.
Contents:
0:00 Introduction
2:58 What is R?
10:58 Research
17:30 Optimizing
25:38 Results - Sirius
26:23 Other Setups
30:15 Wrap up
Links to material I have used in the video (and for further reference):
TransSpec v3.5b:
groups.io/g/astronomicalspect...
Book: Grating Spectroscopes and How to Use Them, Ken Harrison
a.co/d/7U6TVyx
David Boyd talk:
britastro.org/wp-content/uplo...
SolEx, StarEx project:
www.astrosurf.com/solex/sol-ex...
Robin Leadbeater: picture of resolution limiters
www.threehillsobservatory.co.u...
Doug West: math for resolution limiters
users.erols.com/njastro/faas/a...
Christian Buil: Prism, Coma correction:
www.astrosurf.com/buil/us/spe1...
Uwe Zurmühl: Objective grating to the max
spektroskopie.vdsastro.de/fil...
RSpec calculator: for dispersion not resolution
www.rspec-astro.com/calculator/
Dark Sky Geek: StarEX High res introduction
/ @darkskygeek
Coma correcting Prism:
realtime-spectra.com/collecti...
www.shelyak.com/produit/prism...
This is very helpful for someone starting out. Thank you for explaining that spreadsheet. It is very overwhelming when you first look at it and hard to figure out where to start.
Thanks so much for this effort. I've been meaning to get to doug west's article, this gives me a better idea of why. I look forward to more videos on both slitless and slit spectrographs.
You should check out sky scholar though you will probably disagree with him, as far as I know he is a world renowned spectroscopist, highest MRI image, he believes and makes quite the case that the sun is made out of condensed matter not gaseous plasma, most likely liquid plasma like liquid metallic hydrogen.
Thanks for sharing! What an inspiring CZcams channel!