Go Back   IceInSpace > Images > Deep Space
Register FAQ Calendar Today's Posts Search

Reply
 
Thread Tools Rate Thread
  #1  
Old 12-10-2016, 06:30 AM
oernulfs (Ørnulf)
Registered User

oernulfs is offline
 
Join Date: Nov 2012
Location: Norway
Posts: 142
NGC 891 from Norway

47 x 300s captured with an Atik 383l+ color cam through a Celestron 9,25 with f6,3 reducer and guided through a WO 90mm with a Loadstar camera and 2,5x powermate. Everything on a eq 8 mount. All processing in Pixinsight. I must learn how to remove the stars from the image...

Larger version of the image here: http://www.astrobin.com/268002/

Two problems:

1) the stars are marching between exposures and 600s gives elongated stars even after drift alignment. Probably flex in my guide setup. I will buy an oag!!

2) I use Artemis software for capturing, and when doing flats it turned out that the software produced a fileformat called 3S!? Thus I have not calibrated with flats (only darks and bias). I must look into this again...
Attached Thumbnails
Click for full-size image (ngc891_total_noflats_crop_dbe_lfit.jpg)
140.1 KB78 views

Last edited by oernulfs; 12-10-2016 at 07:41 PM.
Reply With Quote
  #2  
Old 12-10-2016, 08:55 PM
Atmos's Avatar
Atmos (Colin)
Ultimate Noob

Atmos is offline
 
Join Date: Aug 2011
Location: Melbourne
Posts: 7,013
It's looking good at the moment You may want to mask the stars when doing what I assume is a deconvolution. The stars around the galaxy have dark rings
It could be mirror flop causing the issue or differential flexure caused by the differing cooling rates. Both of which fixable with an OAG
Reply With Quote
  #3  
Old 12-10-2016, 10:35 PM
oernulfs (Ørnulf)
Registered User

oernulfs is offline
 
Join Date: Nov 2012
Location: Norway
Posts: 142
Thank you for comment. I haven't quite dared to go "advanced" on the Processing concerning stars. I guess I must try sooner or later...
Reply With Quote
  #4  
Old 12-10-2016, 11:22 PM
Atmos's Avatar
Atmos (Colin)
Ultimate Noob

Atmos is offline
 
Join Date: Aug 2011
Location: Melbourne
Posts: 7,013
We all get there in the end
Reply With Quote
Reply

Bookmarks


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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 12:30 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement