NGC55 with Ha regions

[sjastro]

I've developed a procedure where Ha emissions in a galaxy are subtly brought out according to the strength of the emission rather than the typical ultra high contrast view.

I think this procedure has potential as I think I will be able to use it to differentiate between OIII and Ha emissions. Further study is required....

I've picked NGC 55 as the target as the Ha detail is not as obvious as in other galaxies.

Details.

LHaRGB image.
L 4 hrs, Ha 3 hrs, RGB 1 hr each.
BRC 250 scope STXL-11002.

Full resolution.
http://members.iinet.net.au/~sjastro/ngc55newc.html

Clear skies

Steven

[blink138 (Pat)]

thats a good 55 steven, i have never seen too much detail in this untidy galaxy before
there are a fair few other fuzz balls around there too!
pat

[marc4darkskies (Marcus)]

Beautiful Steven! Good detail and the colouring looks spot on and natural. Whatever you're doing, it works.

Bit of a colour gradient going on there though plus I see some vertical banding on the left had side. Some kind of interference?

Cheers, Marcus

[FranckiM06]

Wow, it is excellent shot Steven. You really have wonderful image with nice details. I think it will be interesting to have some shots in OIII to see the differents.
Franck

[RobF (Rob)]

Really enjoyed this one Steven. Best 55 I've ever seen I think.

[atalas]

Wonderful Steven!lots of background galaxies too.

[sjastro]

Originally Posted by marc4darkskies

Beautiful Steven! Good detail and the colouring looks spot on and natural. Whatever you're doing, it works.

Bit of a colour gradient going on there though plus I see some vertical banding on the left had side. Some kind of interference?

Cheers, Marcus

Thanks Marcus.
It is a flat field issue that needs addressing.

Originally Posted by FranckiM06

Wow, it is excellent shot Steven. You really have wonderful image with nice details. I think it will be interesting to have some shots in OIII to see the differents.
Franck

Thankyou Franck.
Hopefully I will be able to get 3 hrs of OIII data for a direct comparison.

Originally Posted by RobF

Really enjoyed this one Steven. Best 55 I've ever seen I think.

Robert Gendlar's image is the benchmark.
Thanks Rob for the comment.

Originally Posted by atalas

Wonderful Steven!lots of background galaxies too.

It's good to have a decent chip size Louie, instead of "cramming" data on a ST-X10ME.

Clear skies

Steven

[RickS (Rick)]

A very nice image, Steven. Are you going to tell how you did it or keep us all in suspense?

[sjastro]

Originally Posted by RickS

A very nice image, Steven. Are you going to tell how you did it or keep us all in suspense?

All will be revealed Rick once I obtain the OIII data.
Pixinsight plays a starring role.

Regards

Steven

[Geoff45 (Geoff)]

Very nice Steven. That's the way to do the Ha regions--easy to see but not blinding us in brilliant red light.
Geoff

[sjastro]

Originally Posted by ghsmith45

Very nice Steven. That's the way to do the Ha regions--easy to see but not blinding us in brilliant red light.
Geoff

Thanks Geoff.

Flats were retaken to address the gradient and banding issues in the original.
http://members.iinet.net.au/~sjastro/ngc55newc.html

Regards

Steven

[Stevec35 (Steve)]

Nice NGC55 and a good Ha technique Steven. I'm seeing vertical bands in the background. As I recall my STXL11002 used to do that some times. Generally caused by pushing the cooling too far I think.

Cheers

Steve

[sjastro]

Originally Posted by Stevec35

Nice NGC55 and a good Ha technique Steven. I'm seeing vertical bands in the background. As I recall my STXL11002 used to do that some times. Generally caused by pushing the cooling too far I think.

Cheers

Steve

Interesting I can't see the bands on my monitor unless I stretch the image in PI.
I have not seen this effect on older images, only after I had the CCD repaired by SBIG for an unrelated issue.

Steven

[Rod771 (Rod)]

Awesome detail Steve! Very natural looking result. Well done

[Ross G]

A very nice looking galaxy photo Steven.

Great detail.

Ross.

[sjastro]

Thanks Rod and Ross.

Still waiting on acquiring OIII data to put the technique to the test in bringing out any "unique" OIII emissions in the galaxy but the weather isn't cooperating.

Steven