Markarian's Chain

[peter_4059]

I captured this image from light polluted Brisbane over a few nights earlier this month, 111 subs and 6.2 hours in total. This section of Markarian's Chain contains quite a few galaxies (12 according to Astrobin's plate solve).

Finally got some time for processing and re-learning PI. I had a few challenges with flats that I had to manually deal with and this has left some artifacts in the corners however I'm still quite pleased with how this turned out.

Here's the big version...

https://www.astrobin.com/full/344175/0/?nc=user


Comments and advice welcome, thanks for looking.

[RickS]

Nice colour in the stars and lots of galaxy halo showing, Peter. The galaxy cores look a little odd, maybe blown out?

Cheers,
Rick.

[peter_4059]

Thanks for the feedback Rick. I went back through the history and changed the range mask to omit the galaxy cores when tweaking the star colour. I think this version looks a bit less blown out. New Astrobin link here: https://www.astrobin.com/full/344175/B/

[Atmos]

You've done a good job capturing them from suburbia that's for sure.

The cores in the rework look better but they are still a bit red/orange and look over exposed/saturated.

[peter_4059]

Thanks for the comments Colin. I was thinking the cores looked too blue.

Here's V3



https://www.astrobin.com/full/344175/C/?nc=user

[RickS]

Hi Peter,

I'm seeing the same as Colin. I wonder if there is something funky going on with colour spaces? Your images show as untagged RGB. Without an embedded ICC colour profile we might be seeing something quite different to you. Have a look at the Edit>Color Management Setup dialog. Your default RGB profile should be a device independent colour space like sRGB or AdobeRGB and you should tick the box to "Embed ICC profiles in RGB images."

Cheers,
Rick.

[peter_4059]

Here's what I have

[RickS]

Looks OK, Peter. Ideally you'd have profiled the screen and have a monitor profile matched to it (your screen almost certainly isn't sRGB gamut) but that's not likely to cause major colour shifts. I don't understand why your images don't have an ICC profile when downloaded unless Astrobin or my browser have changed behaviour and are stripping them off.

Can you email me an image?

Cheers,
Rick.

[strongmanmike]

Not too bad Peter and as Col said it's just the cores that are looking a bit orange and I agree with Col, great work from a big city :thumbsup: I see the PI master is on your case so I think you are in good hands :)

Mike