NGC253, reprocess and more data

[gregbradley]

Looking at that image again, its quite a remarkable image. One of your best of which there are many.

Greg.

[RobF (Rob)]

Stunning image Paul.
Love that egg yolk centre. Mmmmmmm!

Thanks for sharing before 253 fatigue set in. I'm not feeling it at all.....

[Paul Haese]

Originally Posted by Shiraz

looking good. just for interest, the two bright stars are B-V of 0.6 and 0.57, which means they are pretty close to the sun - ie pastel yellow (http://www.vendian.org/mncharity/dir...r/details.html). The renditions that show them as blue or orange are taking some liberties with the light .

FWIW, I have had colour oddities on very bright stars when taking colour data on different sides of the meridian - I assume that the scope flexes slightly and the diffraction skirts of the brightest stars do not match up precisely if one colour is taken on a different side from the other two. I haven't tested the theory, since it has only happened occasionally and is easy enough to tidy up.

Ah bugger. I thought those brighter ones were O type stars, the original process showed them to be blue and the second base image showed them to be yellow white. I'll need to fix those now. It is rather odd about the asymmetry. Perhaps you are onto something there Ray. I'll need to test that theory myself.

Originally Posted by gregbradley

Looking at that image again, its quite a remarkable image. One of your best of which there are many.

Greg.

Thanks Greg, I am pretty happy with the results overall, but as pointed out by Ray there are still a few things that could be fixed.

Originally Posted by RobF

Stunning image Paul.
Love that egg yolk centre. Mmmmmmm!

Thanks for sharing before 253 fatigue set in. I'm not feeling it at all.....

Thanks Rob, I find it always to be a great object. There are so many interesting things about this galaxy to investigate.

[marco (Marco Lorenzi)]

One of your best so far, smooth, detailed, colorful.. perfect!
Cheers
Marco

[Paul Haese]

Originally Posted by marco

One of your best so far, smooth, detailed, colorful.. perfect!
Cheers
Marco

Thanks Marco. It's one of my favourites too.

[nandopg]

Hi Paul,
Fantastic image. Comparing your image with some other images made with "professional" telescopes in sites with very little atmospheric extinction, the color of your image is pretty close the color of those "reference" images.

I think that from the scientific point of view, your image is close to a correct representation of the NGC 253 real .

The full resolution image is so rich in details, that hovering over its surface is a really nice trip.

Thanks for sharing,
Fernando

[Paul Haese]

Originally Posted by nandopg

Hi Paul,
Fantastic image. Comparing your image with some other images made with "professional" telescopes in sites with very little atmospheric extinction, the color of your image is pretty close the color of those "reference" images.

I think that from the scientific point of view, your image is close to a correct representation of the NGC 253 real .

The full resolution image is so rich in details, that hovering over its surface is a really nice trip.

Thanks for sharing,
Fernando

Thanks Fernando, I viewed a lot of images from lots of sources to get a feel for what I thought was the correct colour in the first instance and then decided that I did not like that colour depth and hence a reprocess. I am much happier with how this looks now. I still really don't know if I have the correct colour as the colour variation presented on the web is quite wide.