Search found 1449 matches
- Wed Feb 23, 2022 8:44 pm
- Forum: Spectroscopes and Softwares
- Topic: An atlas of spectral lines
- Replies: 2
- Views: 1798
An atlas of spectral lines
Hi, A compilation, for many discharges tube, of lines position and the implication for calibrate spectra (in relation with the spectral resolution or spectral region). You can downwload the atlas in the form of a PDF here : http://www.astrosurf.com/buil/specinti/Atlas_Spectral_Lamps.pdf Christian Buil
- Sun Feb 06, 2022 2:17 am
- Forum: Spectroscopes and Softwares
- Topic: Spectral calibration by using low cost optical fibers
- Replies: 8
- Views: 3125
Re: Spectral calibration by using low cost optical fibers
The technique I show is only suitable for relatively intense spectral lamps. For example, here the calibration of the red part of the spectrum by using an easy to find neon lamp + fibers on a 4-inch refractor - this gives a good reference for very precise calibration (powerful for high resolution H-...
- Fri Feb 04, 2022 10:37 pm
- Forum: Spectroscopes and Softwares
- Topic: Spectral calibration by using low cost optical fibers
- Replies: 8
- Views: 3125
Re: Spectral calibration by using low cost optical fibers
Hamish, for the adjustment of the intensity, the solution is quite simple: I modify the distance "d" between the source (a simple E10 neon lamp, see down to the page http://www.astrosurf.com/solex/specinti.html ) and the input of the fibers. The intensity of course depending on the "d...
- Fri Feb 04, 2022 4:23 pm
- Forum: Spectroscopes and Softwares
- Topic: Spectral calibration by using low cost optical fibers
- Replies: 8
- Views: 3125
Spectral calibration by using low cost optical fibers
I'm developing the following precision spectral calibration : (1) The spectral calibration flux is permanent at the entrance of the telescope/refractor or semi-permanent (low intensity miniature lamps or low cost plastic optical fibers (1.5 mm diameter, 25 euros for 100 meters - see Amazon - see pho...
- Sat Jan 22, 2022 3:19 pm
- Forum: Spectroscopes and Softwares
- Topic: Les logiciels specINTI et specINTI Editor
- Replies: 2
- Views: 1937
Re: Les logiciels specINTI et specINTI Editor
Pour info, une vidéo concernant un atelier Star’Ex sur ZOOM qui c’est déroulé le 21 janvier : https://youtu.be/A5V6xnmRyZ8
Ainsi qu’un PDF des planches ici : http://www.astrosurf.com/buil/specinti/ ... StarEx.pdf
Christian Buil
Ainsi qu’un PDF des planches ici : http://www.astrosurf.com/buil/specinti/ ... StarEx.pdf
Christian Buil
- Sun Jan 16, 2022 11:55 am
- Forum: Symbiotic Stars
- Topic: T CrB before its new nova event
- Replies: 29
- Views: 16760
Re: T CrB before its new nova event
Spectrum of T CrB taken the 12/01/2021 by using a 4-inch refractor and a Star'Ex spectrograph at power resolution of R=20000: http://www.astrosurf.com/buil/forum27/_tcrb_20220112.png The spectrum can be downloaded here: http://www.astrosurf.com/buil/forum27/_tcrb_20220112_111.fits Christian Buil
- Sun Jan 16, 2022 11:39 am
- Forum: Spectroscopes and Softwares
- Topic: Les logiciels specINTI et specINTI Editor
- Replies: 2
- Views: 1937
Re: Les logiciels specINTI et specINTI Editor
Publication d’une vidéo montrant l’usage de Star'Ex sur un instrument relativement modeste (lunette de 100 mm) et une petite introduction à specINTI. La vidéo est en deux parties, jour et nuit : Partie 1 (le jour !) : https://youtu.be/8uupSa9wXaU Partie 2 (la nuit !) : https://youtu.be/ccyvpIxm3Nk (...
- Tue Jan 11, 2022 9:36 pm
- Forum: Spectroscopes and Softwares
- Topic: Les logiciels specINTI et specINTI Editor
- Replies: 2
- Views: 1937
Les logiciels specINTI et specINTI Editor
J'ai le plaisir de vous annoncer la sortie des logiciels de traitement de spectres specINTI et specINTI Editor. Vous pouvez les télécharger et consulter la documentation à cette adresse : http://www.astrosurf.com/solex/specinti.html Il s'agit d'applications écrites en Python, pouvant tourner sous Wi...
- Thu Dec 23, 2021 12:29 am
- Forum: UVEX Project
- Topic: UVEX optimal telescope focal ratio
- Replies: 10
- Views: 6256
Re: UVEX optimal telescope focal ratio
Hi,
The level of astigmatism aberration is proportional to the power 3 of D/F ratio.
The level of spherical aberration is proportional to the power 2 od D/F ratio.
The difference between f/5 and f/10 is considerable in terms of image quality (better at f/10 of course).
Christian
The level of astigmatism aberration is proportional to the power 3 of D/F ratio.
The level of spherical aberration is proportional to the power 2 od D/F ratio.
The difference between f/5 and f/10 is considerable in terms of image quality (better at f/10 of course).
Christian
- Sun Dec 05, 2021 5:19 pm
- Forum: Novae
- Topic: Probable nova in Aries
- Replies: 3
- Views: 2391
Re: Probable nova in Aries
A spectrum of the event taken nearly at the same date of your spectrum Robin. I use a 250mm f/4 Newton + a Star'Ex spectrum (low cost 3D printing setup) in a low resolution version (R=750): http://www.astrosurf.com/buil/forum27/_pnvj030227_28+191754_5_20211129_78.png http://www.astrosurf.com/buil/fo...