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Hi Andrew, I would be very interested please – I am hust gettign into Spectroscopy – do you still have it?
All the best Jonathan
Jonathan
Sorry Robin, I realise no flats for slitless havingread your piece, just darks and offset
All the best Jonathan
Jonathan
Thank you so much Robin for the encouragement – I was determined to master it. I didn’t spot anything on cropping but I see it now… I missed the tip as you suspected… seems more like an essential step!
I cannot tell you how excited I was when it worked – Thank you so much, I could not have done it without you – screenshot attached. All ready to do my own now once I have done my darks and flats and offsets – just need to work that out now and then wait for the clouds to roll away. 3C273, here we come! I wanted to learn ISIS because I suspect I will get an Alpy at the first opportunity.
I can do my flats with a tungsten lamp right? can I use an LED lamp instead, do you think?
I will have a look at the other resources – I did go through David’s US talk, but got a bit lost at flux and rectification – my career has been in life sciences not physics, so more work to do there – thank you, I’ll look at your website.
Many many thanks Jonathan
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