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billdan
08-01-2016, 12:04 PM
Gooday,

I'm on night shift at the moment and I only have Wednesday and Saturday nights free. This last Wednesday happened to coincide with a beautiful clear night.
Not knowing where to find Thors Helmet, I did a precise 2 star alignment on the EQ6 and then relied on its Goto accuracy. As you can in the widefield shot its a bit off centre.
We have 24 five minute subs, 11 t-shirt dawn flats, darks and bias applied.

Don't know where the gradient came from but the last sub was at 3-50 am so maybe approaching dawn could be the culprit.

My stars look like eggs but PHD reported 1.4 arcsec RMS, so i must be flex somewhere.

Thanks for looking
Bill

rustigsmed
08-01-2016, 03:36 PM
not bad Bill, you could try and make an artificial flat to remove the gradient or maybe digging through the later subs to see if dawn was interfering - then re-stacking.

might be worth taking some one-off binned shots before beginning the imaging run, to centre / orientate the target. but some nice detail in there, I think it is a really cool object.

cheers

russ

billdan
08-01-2016, 04:53 PM
Thanks for your encouragement Russell, yes, next time I'll know where to put that bright orange star at the bottom.

As a matter of interest I re-stacked them with no flats and only used a defect map for a quickie.

Regards

Bill