I finally had a chance to image my first spectrum of Vega. I've had a quick look on the net for examples and it is close but I'm wondering what the dip is just...
Hi David, Congratulations on you first spectrum :-) The dip is at the overlap between the green and red channels and is almost certainly caused by the camera...
Thanks Robin for the comments. I suspected along with others comments that the sensor response was a factor. Your comments are very accurate in describing the...
If you are having problems with clouds or light summer nights at the moment, here is an alternative use for the Star Analyser. Just posted over on the German...
Hello, I very recently joined this group and would like to introduce myself with a tiny Vega´s spectrum, made through my Staranalyser 100 in slitless...
... Ok, this really did catch my eye here tonite. Am I correct that you used the star analyzer for this, and that's a mag 12+ target ? Everybody I've spoken...
Hello, You can reach magnitude 12 easily with a Star Analyser if you have a sensitive CCD camera and a good scope. A webcam is a real limitation but allow you...
Torsten, Excellent spectrum: well resolved and you got the Balmers lines very well. I notice that the red portion of the spectrum is very noisy. Does the DMK21...
... Now this has _really_ peaked my interest a LOT more. We would be qhy9 as the ccd, so, it's a very sensative cooled camera, mounted in an 8 inch SCT. My...
maybe also a large fiber ;about 30 mn can work as (aperture mask) if the giding is realy very good jack 47'n 71'W Ps I have some info for plastic fiber very...
Hello, At some point, moving the grating away from the chip increases dispersion but doesn't improve the resolution which is limited by the quality of your...
Hello Robin/Everyone, I have just put a spectrum of gamma Cas (as far as I have got with it) in Files>User_Folders>Janet Simpson gamCas profile.jpg. It is...
Hello Olivier, one reason for the noise in the red portion might be the quite low SNR caused by a relatively low rate of stacked frames (I usually stack 10 - ...
Yes, this is quite straightforward with a Star Analyser and a long exposure camera provided you have reasonably dark skies. (I originally used a long exposure...
... Yes the QHY9 should work fine. Note though that although you will get more dispersion (a longer spectrum) by placing the Star analyser further from the ...
Hi Jan, A nice result, particularly using a fixed camera. The H alpha emission line is showing up clearly at the right hand end despite the low sensitivity of...
Hi again Janet, A couple of other points I missed from your last post (My broadband was down so I was rushing my repsponse on pay per minute dialup) ... ...
Hi Robin, Thank you for your help. I haven't got much further but with Rob's advice I managed to crop fits files in AIP4WIN. I managed to straighten this one...
Hello, a recent result, using the Staranalyser in front of a f = 135mm fotolens. Exposure time 0.3 sec at ISO 1600, Camera on tripod, 16 images stacked, dark-...
Very nice! It is exciting to see what you all are doing with such a simple device! Hopefully the weather will clear here and I can start climbing the steep...
Thank you, Paul! Have fun during your climbing! [:)] To compare results, I added an Arcturus spectrum, obtained with my DMK. Arcturus spectrum with fotolens...
Hi Robin, I tried resizing and rescaling, and it worked, thank you. Meanwhile I have been trying to calibrate a spectrum of Altair, to use to calibrate gamma...
Hi Jan, Not sure what is preventing you uploading files. Do I understand that you cannot get in to see the files at all? The website settings seem correct and...
Hi Robin, I seem to have had a lot of trouble getting into the members only section over a long period of time. I think it was all right when I first joined...
Robin/ Janet The camera responce curve looks very similar to the one I found last year ( Remember the discussion, Robin?) for a combination of the Std Canon...
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