OSC RGB and Dual Narrowband Combination - Forums

Topic starter

Sep 4, 2023

I have a slight dilemma. I have collected about 3hrs of data on the Pac-Man Nebula using My 294MC Pro (OSC) with a UV-IR Cut (RGB) and 2.5hrs of data with my Antlia Dual Narrowband (Ha/Oiii) Filter. I'd like to combine the data in Pixinsight but not sure how.

So far I've processed the data separately to get two images. Then I added the stars from the RGB to the Narrowband using Bill Blanshand's RGB stars process. There must be a better way. Can someone help me??

Thanks
Aris

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Jure Menart

Sep 4, 2023 · Edited: Sep 4, 2023

Hi @Aris Pope,

I am no expert (but did twice comine Ha to RGB in my pictures) and I am using mono, but I think good start would be to check NBRGBCombination script ( Script - Utilities - NBRGBCombination).

Another way is to use PixelMath for each channel (adding Ha to red and Oiii to blue/green). I think most people will say this is not the right approach but for me it was the easiest and I got most control, how much of Ha to add, example for Ha to red channel (I imagine Oiii woould be similar):

Where 1.2 is some factor I usually play around with and Ha is label of my Ha image (obviously)

Helpful

patrice_so

Sep 4, 2023

Hey there,

The above suggestion is surely a very good one.

Additionally, you might be very interested in this advanced guide for NB signal integration :
https://www.nightphotons.com/guides/advanced-narrowband-combination

Cheers,

Patrice

DavidT

Sep 4, 2023

I'm sure there are better ways of doing this. But it works. I like using Bill's Add Ha to RGB formula.

In Pixinsight

1 use Image Integration on page one of Processes
2 Add Files. It wants 3 images so add the RGB twice and Dual Band once. Or visa versa.
3 Apply Global.

Hope this helps

Aris Pope

Topic starter

Sep 4, 2023

Thanks everyone, that gives me some really good ideas to try!!

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