Forum Replies Created
Thank you Robin
i did wonder about high cloud wafting through which I didn’t see, I also wondered if I used to long an exposure. Next clear skies I’ll try both stars again with different length exposures.
if I’m looking at the right thing, all the ones on the two not so noisy spectra are the same, whereas there is a difference between the subs for alpha cyg and alpha peg.
The weather has defeated me for tonight, hopefully will get a cleat patch next week to try them again.
Thanks Andrew and Robin.
Thanks for the suggestions. Guiding was doing well as I was watching it, seeing was good when I imaged these two and Im sure they were the right stars as I used sync before moving on to next target. I did wonder about trees so checked height and tree tops but they appeared clear.
i use an Atik camera controlled by Artemis, the telescope runs with Cartes du ciel with a costar for guiding in phd2.
if we get clear skies I’ll try again tonight
Thank you both.
Thank you for explaining why the topic disappeared.
Is this software available to anyone or is it still being tested?
Hi David and Robin,
i set the smile using a neon light source.
These are my numbers from the last run through
Wavelength fit deviation
point #1 x = 706.025 lambda = 3839.683 dlambda = -4.293
point #2 x = 724.012 lambda = 3879.507 dlambda = 9.543
point #3 x = 767.819 lambda = 3979.946 dlambda = -9.866
point #4 x = 816.480 lambda = 4096.430 dlambda = 5.320
point #5 x = 913.897 lambda = 4341.149 dlambda = -0.669
point #6 x = 1111.911 lambda = 4861.383 dlambda = -0.043
point #7 x = 1782.002 lambda = 6562.789 dlambda = 0.021
point #8 x = 1898.594 lambda = 6872.013 dlambda = -0.013
Coefficient a4 : 7.007126E-10
Coefficient a3 : -3.752157E-06
Coefficient a2 : 7.268176E-03
Coefficient a1 : -3.45201
Coefficient a0 : 3798.122
RMS : 8.861652
hi Andy and Robin,
i did the calculations and came up with p=4.66.
I tried this and got an RMS of 22.118.
I repeated it with 4.69 and got an RMS of 8.86, so will stick with that figure for now.
Thanks for the help
i am using an alpy without calibration module. Star is delta cas. I have now got things closer by changing my pixel value slightly.
Great guide Paul.
Thank you all.
I never realised taking flats could be so confusing, but I have a pillow case and will find a Halogen light to use.
Does it need to be a halogen light or is there other options?
I tested mine over the weekend and got a similar looking curve to yours.
will have to try another method for flats.
Thank you Nick and Robin. At present I can’t afford the section for the alpy which does flats or the calibration module, so I’m trying to see if what I have will work.i will test the panel and also other methods and see which I can achieve the best results with. it would be interesting to see what results you get Robin.