Rosette Nebula, bi-color  

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(@huerbsch)
Brown Dwarf Customer
Joined:10 months  ago
Posts: 6
December 4, 2017 16:36  

Big thanks to Mabula who has always been very responsive and helpful to my processing workflow and other questions : )

Still steep in the learning curve from DSLR to cooled mono (QHYCCD 163m) but finally starting to figure it out. The OIII channel is weak and I will be adding more data to it this week. 1.5hr of Ha = red, 1 hour of OIII = Blue, blend of Ha/O3 for Green. William Optics 71 triplet APO with 0.8x

Rosette bi color2 resize


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(@mabula-haverkamp-administrator)
Quasar Admin
Joined:1 year  ago
Posts: 1506
December 5, 2017 22:50  

A golden Rosette !

Nice result huerbsch 😉

Mabula

Main developer of Astro Pixel Processor and owner of Aries Productions


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 Eric
(@flywaldo)
White Dwarf Customer
Joined:12 months  ago
Posts: 14
January 3, 2018 20:27  

Mabula

I've also been working with bicolor data for IC 410, the Tadpoles. My results look a lot like the OP's image of the Rosette. Very golden, with little of the blue of the OIII channel showing through except where the HA data is less dense. I've fiddled around with the sliders in attempt to get better differentiation, but have not had a lot of luck.

I have a lot of data in both channels and it does look good, but it doesn't look 'right'. Do you have suggestions on how to manipulate this kind of data set to get the results that I describe?

Thanks,

Eric

Tadpoles Ha OIII


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(@mabula-haverkamp-administrator)
Quasar Admin
Joined:1 year  ago
Posts: 1506
January 7, 2018 14:48  

Hi Eric,

Looks like very nice data indeed.

What kind of settings did you try in making the composite?

Did you try giving the OIII a higher multiplication factor?

Since it's a bi-color, I would normally recommend, to give the OIII a factor of 3-6 more than the Ha data, but it really depends a lot on the quality and integration times of both channels.

Then mixing the 2 channels into 3 channels is something you really need to play with. For instance try this:

Multiply Ha with 1.00x

Add Ha to Red 100%

Add Ha to green 25%

Multiply OIII with 5.00x

Add OIII to green 75%

Add OIII to blue 100%

I will be happy to have a look at creating the composite myself if you want?

Mabula

Main developer of Astro Pixel Processor and owner of Aries Productions


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(@huerbsch)
Brown Dwarf Customer
Joined:10 months  ago
Posts: 6
January 12, 2018 19:01  

Thanks for the tips, I was able to get better star colors (blue instead of white) by using your guide above, but changed to the following since I didn't have Oiii data. Got the Oiii last night and will integrate soon...

S2 - G75% B100% x 2 

Ha - R100% G25% x 1 

Ha - L x 1.5 100%

Flame Tadpoles New Resize Sm Sig

 


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