LinkBack Thread Tools Display Modes
Old October 14th, 2009, 03:54 AM   #1 (permalink)
Paramount's Avatar
Paramount
Member

Join Date: Jun 2008
Location: Hereford UK
Posts: 75
Status: Offline
NGC7635 - Bubble Nebula in HST palette

Hi
I finished this over two nights thanks to some clear skies although the second night was plagued by some high thin mist. I had to reproces this a couple of times as the stars were overwhelming the nebula due to halos and brightness but I think I have managed to reach a compromise. As the SII signal was much weaker than the Ha I had to push it harder hence the 'colourful stars' but this is a known issue with the HST palette with weak SII.
It was taken with the Takahashi BRC-250, Starlight Xpress H9 on a Paramount ME with autoguiding taken care of by a Starlight Xpress Lodestar on a TMB 115 using dithering in Maxim DL, there are 21x10 minutes for each channel. Simple auto dark subtraction was done in Maxim DL, no flats or bias frames were used. I did a widefield image of this last year using the TMB115 and H36 camera and this can be seen on Nebulae section of the image gallery on my website Imaging The Heavens - Home Page for comparison. Although it is still far from perfect with the halo problems I am quite happy with the results
Thanks for looking
Best wishes
Gordon

__________________
Please visit my website for a look around http://www.imagingtheheavens.co.uk
 


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



© 2007 Mondo Brands LLC | All Rights Reserved SEO by vBSEO 3.0.0