Hello, you can find a interesting post at http://spektroskopie.fg-vds.de/forum/viewtopic.php?t=2379 Also with slitless spectrography you can measure orbital...
Hi John, In a word, Yes! They are exactly the same! There were originally some historical differences, essentially related to the type of detectors that were...
I would be very grateful if anybody could explain the following: Why does the frequency of light vary with change in a viewers velocity relative to the source...
Hi I'll give this a try! Lets use sound (a mechanical wave as an example) If an ambulance is traveling toward you at a speed of 100 m/s and you are stationary...
Dear Walter, Thank you for your email. The explanation for the acoustic Doppler effect is fine as we are dealing with phenomena at very low speeds which are...
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Stan Gorodenski
stanlep@...
Apr 5, 2008 10:11 pm
I centered the zero order image of the slit according to the instructions that came with the LHIRES III. Attached is an image of the zero order. I have a...
4407
François Cochard
francois.cochard@...
Apr 6, 2008 7:34 am
Hello Stan ! There is a lot of things in your messages - and pictures ! I can help on several points, perhaps not all. The pattern you can see at top end of...
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Stan Gorodenski
stanlep@...
Apr 6, 2008 6:06 pm
Hello François, Thank you. It all makes sense. Yes, I can confirm that I also see the same line narrowing in the Neon image at roughly the same position as in...
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François Cochard
francois.cochard@...
Apr 6, 2008 6:28 pm
Hi Stan, ... We usually work at always the same wavelength (ie Ha). Then, the best is to make your alignment in this region - and that's it ! You have to keep...
Bonjour, I will try some explanations, not too easy, without a way to write Special Relativity equations. First we can found the relativistic doppler shift...
Dear Bernard, Thank you very much for your email. I do not think I explained my question very well so I will try a different approach: If you have a photon...
Bonjour, ... Yes, if the source is emitting F1 and you are not moving compare with the source you will mesure a frequency of F1 ... Yes ... Yes ... Yes because...
it is easy to make the graph of a whit led but if we can making it turning at 10,000 Tpm for exemple is it good to have a shif by putting a led on a grinder...
... Hi Olivier, I'm unfortunately not going to be able to attend the NEAF event as I will be finishing up my teaching duties at my university. However, I did ...
... Hi Ron, Not sure if you meant this to go to the whole group but anyway, I am a British amateur who is using Vspec quite extensively for reducing my ...
On Wed, 09 Apr 2008 12:32:21 +0200 Olivier Thizy <Olivier.Thizy@...> wrote: Hi Oliver, Hi Ron, ... It's not exactly that in FITS files. FITS files have...
Bonjour, Actuellement à l'observatoire des Makes, j'en ai profité pour réaliser quelques spectres dont celui de Eta Carene que voici: En base résolution...
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BM
bmauclaire@...
Apr 9, 2008 12:12 pm
On Wed, 9 Apr 2008 13:37:28 +0200 (Paris, Madrid) sylvain@... wrote: Formidable cette idee de spectraliser cette mysterieuse et si celebre...
Bonjour Sylvain, C'est intéressant! Peux tu nous dire la région d'eta Carene oú tu as mis la fente? Merci Jose http://astrosurf.com/joseribeiro ... From:...
... Hi Ron, I've gotten pretty adept with VSPEC at this point. As Olivier pointed out, most of the menu system is translated into English. The only exception...
Dear Bernard, Thank you for your prompt reply. So it is the difference in relative velocities between the source of the photon and the photon detector that...
you mismastch to real speed to a fix object and the relative speed to you the light do not change it speed but it speed relative to you or to your reference...
Bonjour, ... and photon energy. However, the speed of light in a vacuum is constant so that even if a detector is approaching the source and decreasing the...
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Stan Gorodenski
stanlep@...
Apr 9, 2008 4:47 pm
I have a spectrum I would like to calibrate using the neon lamp spectrum to calibrate it. I went into 'Elements' in VSPEC and was able to get a list of...
Hi Stan, It can be a bit tricky identifying which line is which but I initially used Christian Buil's neon spectrum which shows the lines at their true...
