Perseus A

[kirkster501]

From November 2019.  This seven hour data set is capable of getting much more out of it than I am getting here.  I really struggle with these distant small galaxies in processing and need to keep practising.  They were nice and clean LRGB masters at at one stage but get progressively noisier the further I go and I lose definition in them.

Anyway, TEC140 and CCD Atik 460 and Astrodon filters.

[Sunshine]

Incredible, astounding amount of galaxies in this image.

[sloz1664]

That's an "eye opener" Steve. You have processed it very well from my prospective. Amazing.

Steve

[Tommohawk]

Lovely image! So many galaxies... its mind blowing! 

[kirkster501]

Thanks.  I think I am trying to reduce the noise too much at the linear stage and destroy some of the detail.  I am going to have another go tomorrow

[sloz1664]

If you are using Pixinsight I tend to use MLT on the Linear stage prior to HistTransform.

Steve

[kirkster501]

Yes Steve, but I think I have to tone down this noise reduction.  I just applied it to the first two wavelet layers on this occasion and I like the result better.

[MartinFransson]

Wow, that´s deep. I think you could back off on the noise reduction even more. The background looks too smooth and I´m sure you are losing the smallest and faintest galaxies there. Also, I find that a small amount of noise makes the image look more "real".

[sloz1664]

1 hour ago, kirkster501 said:

Yes Steve, but I think I have to tone down this noise reduction.  I just applied it to the first two wavelet layers on this occasion and I like the result better.

I agree Steve, that looks a whole lot better.

Steve

[kirkster501]

Thanks guys.  I will give it another go tomorrow. This is a hard earned data set and I want every photon to count in it! :) 

[MartinB]

This image certainly has the wow factor.  It is the sheer enormity of what is in view.  An image to be appreciated by non astronomers as much as by imagers.  I've not gone looking for noise so haven't seen any!  Have you tried mure denoise?

[kirkster501]

I'm going to have another go at this over the next few days.  There is seven hours of data in this picture, so many galaxies at 220 million light years.  Humbling isn't it?