NGC891

[rbrecher]

The grey skies continue, so I am continuing to process older data with new techniques.  The data for this image was acquired in 2013 and the version I posted then got published a few times.  However, I think this version is much better (galaxy is longer, wider and shows more detail, background is brighter revealing many faint galaxies in the field, colours are more subtle).  Unfortunately, there's something funky going on with the stars. I think there was some miscollimation at the time.  I controlled it as well as I could without making the stars look unnatural.  A cool aspect of this image is that I used Drizzle integration in PixInsight to make the masters.  I did this in parallel with a regular (i.e. non-Drizzle) integration.  The Drizzle version shows marginally more detail when viewed side by side at the same size on my 27" iMac.

 

http://astrodoc.ca/ngc891

 

The 2013 version is also linked on the website, for those who want to compare.

 

Clear skies,
Ron

[MarkS]

Hi Ron,

 

The new version certainly shows more detail. Do you think that is largely due to the Drizzle Integration?

 

Mark

[rbrecher]

No, per my post above, the drizzle made very little difference, which is not surprising since the data was not very under sampled.  What made the huge difference was my image processing skill, which has evolved considerably in the last three years.