NGC253 more data and reprocessed

[Paul Haese]

I now have more data on the Sculptor galaxy and think this version is a better process. Less over sharpened in my opinion with more fine detail showing. Some elongated stars but this is due to flexure.

I used the Spiegel teams version of this galaxy as a guide. It is probably the best amateur image of NGS253 I have seen and my imaging has a long way to go before I can possibly match these guys.

As of note I am really impressed with the STL11 which requires little subs to produce good results. Although I am having some trouble with removing the column defects. I redid my darks and this helped but do I need to redo my bias frames too?

Anyway to the image.

Click here for the larger image.

[E_ri_k (Erik)]

Very nice! Sharp and lots of detail What length are your subs in this image?
Erik

[Paul Haese]

Thanks Erik, sub length is 5 minutes with the STL11

[RickS (Rick)]

Very nice, Paul! Heaps of detail.

I found the best way to deal with a bad column on my STL11K is to map it out completely and use dithering. Calibration just won't get rid of it.

[Paul Haese]

Originally Posted by RickS

Very nice, Paul! Heaps of detail.

I found the best way to deal with a bad column on my STL11K is to map it out completely and use dithering. Calibration just won't get rid of it.

Yeah been doing the same via the guide camera. That does dither but maybe not enough. Might make it through the mount.

[E_ri_k (Erik)]

Originally Posted by Paul Haese

Thanks Erik, sub length is 5 minutes with the STL11

Wow, that's nice and short. I was taking 15 minute subs with my QHY.

[SkyViking (Rolf)]

Very impressive, and even better than the first version. It looks very well processed. Definitely one of the best NGC253's that I've seen. Great work Paul.

[Larryp (Laurie)]

That's a superb image, Paul-so much detail!

[Paul Haese]

Thanks guys, really appreciate the comments.

[pvelez (Pete)]

That is a cracker - well done

Pete

[marc4darkskies (Marcus)]

That's a superb image Paul - beautiful - lots of detail and nicely balanced & saturated colour.

I use CCDStack to repair bad columns and hot pixels - very effective. Create a bad pixel map using a stack of darks. Apply the map to all darks and subs after that. I also dither by a few pixels.

Cheers, Marcus

[gregbradley]

Very nicely done Paul.

Greg.

[Stevec35 (Steve)]

Excellent! Loads of beautiful understated detail and perfect colour. I don't know if you use Maxim Paul but it enables you to get rid of bad columns quite easily by defining them on a bad pixel map.

Cheers

Steve

[Leonardo70 (Leonardo Orazi)]

Really nice Paul. Nice to see the RC in action...

All the best,
Leo

[cventer]

Love it. Well done.

Weather here has been so s . . t for so long I can remember when i last grabbed any photons

[RobF (Rob)]

Top shelf stuff Paul. Any plans to add some Ha perhaps?

[gregbradley]

Bad columns also reduce with higher cooling levels.
Greg.

[TrevorW]

Nice one Paul

[alpal]

Hi Paul,
That's really nice.
I need to add a lot more data to mine - ( in flickr photos)
that I did on Sunday night.
72 minutes total of LRGB just wasn't enough.

Well done - one of the best I've seen.

[marco (Marco Lorenzi)]

Extremely sharp to the center Paul, to me one of the best images on this galaxy I have ever seen!

Clear skies
Marco