Thread: M83 - 2 hours
View Single Post
  #9  
Old 04-05-2015, 10:27 PM
andyc's Avatar
andyc (Andy)
Registered User

andyc is offline
 
Join Date: Dec 2011
Location: Sydney
Posts: 1,008
Thanks everyone! Am pretty happy with the result.

Quote:
Originally Posted by raymo View Post
Very nice Andy, but I notice that you have the blue gradient in the
bottom half of the image. Cometcatcher posted instructions for
eliminating gradients in his reply no.11 to my current post of NGC 5128
[Centaurus A]. Maybe you could make a fine image even finer.
raymo
Hi raymo (and thanks too!), I was well aware of the gradient, my battles with PixInsight's DBE just weren't quite producing the result I wanted. I left it out in the end so that I could simply get an image out! Subtracting the DBE background left quite heavy fine-scale noise (with many black pixels), though a flat broad-scale background. The image is much prettier with the broad gradient and smoother fine-scale structure. I have a couple of plans to get the DBE working better when I have time. I'll have a play with the background in Photoshop as you suggest, but it's probably more effective if I can get DBE working as it will be within my initial processing workflow - fewer unnecessary file/program conversions. All part of the fun!

Last edited by andyc; 05-05-2015 at 12:10 PM.
Reply With Quote