Re: RY, DN, DR Tau with Star Analyser
Posted: Mon Feb 11, 2013 7:09 pm
Thanks Robin - I do appreciate you taking the time to do these comparisons. I will look at my calibration methodology and see if I am doing something wrong. I suspect it is in part due to not getting good focus on the spectra. I focused on the zero order and then did an offset that I had previously calculated. I had tried to step in the focuser and measure the change in line sharpness but got inconclusive results. I noticed your comment elsewhere that on focus your zero order is a doughnut so I may not have got in far enough. I have just got a copy of Rspec which should help considerably with its focus option. I just tried it with my Lisa and it worked very well in focusing the Ne lines.
Having said all that, I am pleased at the level of correspondence in our spectra once the calibration offset is corrected.
Thanks for your help. If you have any additional advice I would be happy to have it. I will return to these stars next season and practice refining my technique in the mean time. If only we had more clear nights!
Thanks again Andrew
Having said all that, I am pleased at the level of correspondence in our spectra once the calibration offset is corrected.
Thanks for your help. If you have any additional advice I would be happy to have it. I will return to these stars next season and practice refining my technique in the mean time. If only we had more clear nights!
Thanks again Andrew