Bonjour Olivier, Tous mes meilleurs voeux à toi aussi. Bravo pour ton enthousiasme communicatif et longue vie à la spectrographie amateur ! Bien amicalement ...
Dear Colleagues, The following is a report of my trip to Mt. Hopkins in Southern Arizona to do infrared spectroscopic observations with Dr. Bob Stencel using...
8621
Stan Gorodenski
stanlep@...
Jan 1, 2011 6:41 pm
All, Everything I talked about regarding the December 7th and 25th spectra of Epsilon Aurigae is summarized along with spectra at ...
A Happy New Year to all eps Aur watchers The list of amateur spectra taken during this eclipse has been updated and is available here (There are 494 spectra to...
Hello, After 10 years of doing photometry, I have decided to venture into spectroscopy. I have an Lhires III on the way and am trying to decide on the ...
8624
Stan Gorodenski
stanlep@...
Jan 2, 2011 6:31 pm
The following is my understanding of the absorption D line formation. Please correct me or add to it. The energy level an atomic electron can be in is...
Hi Keith, I use a ST7 and a ST10 in my LHIRESIII. Both cameras show some remanence after Ne exposure. One possibility is that the cause may not be due to the...
8626
Stan Gorodenski
stanlep@...
Jan 2, 2011 8:27 pm
... One thing I discovered is that if I operate the lamp from a wall socket power source and turn the lamp on and off by just unplugging the power source, I...
Given that all ST cameras have shutters it is easy to see if the 'afterglow' is from the cooling neon lamp or internal to the KAF CCD chip, or both. I've found...
8628
bmauclaire@...
Jan 2, 2011 9:37 pm
Hello all, Happy new new! Yesterday night was the first clear sky night since 3 weeks. The following spectrum : ...
Thanks to all for your comments. They are helping me to reach a decision. Jose, can you please tell me what specral range you get with your ST7 using the 2400...
<<<<<<<Jose, can you please tell me what specral range you get with your ST7 using the 2400 l/mm grating. >>>>>> About 80 Angstrom centred in H-Alpha. Here for...
Keith, I get a 200 A (198 actually) range with my ST-8 when using a 2400 grating, as can be confirmed easily with Buil’s spreadsheet...
8632
mauclaire
bmauclaire@...
Jan 2, 2011 10:36 pm
... Focus problems appears with 300 and 15O l/mm grating. With 150 l/mm and kaf1600 you have entire visible spectrum : for example 3300-7800 A. See spectral...
Bernard and Jose, Thanks for your responses. Your information is exactly what I was looking for. I rather suspected that the ST8 would give twice the spectral...
8634
stanlep@...
Jan 3, 2011 1:01 am
... I get about 175 angstroms. I have an f/10 telescope and do not have any focal reducers or enlargers. Stan...
Thanks Stan, This tells me what I needed to know. Cheers, Keith ... Thanks Stan, This tells me what I needed to know. Cheers, Keith On Sun, Jan 2, 2011 at 7:01...
I forgot to clarify in my earlier post that the 200 A spectral window for the ST-8 is when centred on 5870 A. When centred on H alpha (6563 A) the window is...
8637
stanlep@...
Jan 3, 2011 2:28 am
8638
stanlep@...
Jan 3, 2011 2:35 am
Thanks, Bernard. You cleared up a mystery for me. When I said I was getting 175, that was when I was taking a spectra in the H-Alpha region. I had noticed then...
Hi Stan, ... Yes the dispersion goes up as the angle of the grating relative to the incident light becomes shallower. Here is a plot I produced for my (old) ...
8640
bmauclaire@...
Jan 3, 2011 6:30 pm
On Sun, 02 Jan 2011 11:31:47 -0700 ... Here is what I know about quantic description about atoms. m, as you said the mangetic quantum number is related to the...
Stan, I wish that I had Benji as a tutor when I was struggling to understand what he has explained. Would it not be possible with an Lhires and the appropriate...
Patrick, If by your question you mean is it possible to detect the individual D1 and D2 lines then yes, this is very easy with a 1200 l/mm or higher grating....
Bonjour Christian, Bonjour à tous, Je vois que Rlhires n'a pas l'option "dark optimisation" comme SpIRIS / IRIS. Pourquoi? I see that Rlhires does not have...
Hello I am looking for someone who would be interested in collaborating on a project by taking some spectra of a 9-10th magnitude object in Orion. I am...
