IC1805 - The Heart Nebula - full SHO with OSC camera (Morsing)

IC1805 - The Heart Nebula - full SHO with OSC camera

Revision title: Full SHO with OSC camera - colour re-balanced

I got a new Optolong 7 nm SII filter and this is my first test with it. I have an ASI533MC pro OSC (one shot colour) camera, but since I get good results with the L-eXtreme dual narrowband filter, I thought it would be fun to se what you could do with SII data to supplement the dual narrowband data, to make real SHO false colour images.

So this image is 9 hours of Ha/OIII with the L-eXtreme and 10 hours of SII. I was very curious to see how much of the faint SII data I could get (using 300s subs), and it is week, but I was still satisfied/relieved with the amount of data present! See the other version on this page for a minimally processed SII mono signal (EZ denoise, DBE, Stretch), to get an idea of what to expect from SII on an OSC camera.

I know I could have gotten the same signal to noise much quicker with a mono camera, but I don't have one and for now, it is way to expensive for me - with patience this is a reasonable alternative! With a mono camera, I guess the equivalent integration times would have been 2.25 hours of Ha, 4.5 hours of OII (I used the green channel, so half the pixels of the OSC camera), and 2.5 hours of SII, totaling 9.25 hours - half of what I used here. The resolution would probably have been a little better with mono as well.

Still, I really like the final result! It can be compared to my previous take on the subject (see it here on Astrobin as well) using only the L-eXtreme data. The colour gradients are much better in this image and the detail is also significantly better. I don't know how this would compare to just doubling the amount of dual narrowband data though. If you pixel peep, this processing might be a bit overcooked - at least it is stretched to the very limit (and perhaps beyond?), but I like the overall look and fidelity.

Original
B
Final
C

B

Title: Full SHO w. OSC

Uploaded: ...

C

Title: Full SHO with OSC camera - colour re-balanced

Description: Re-balanced the coulour for a less psycadelic look. This one is less harsh and shows more natural colour gradients.

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	5516656
PixInsight job	UGE85FH5UJ2ZUQAJFQ1X4ZT4A5IN0L1T
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	02h33m09s.81
RA (top/left)	02h39m02s.47
RA (top/right)	02h45m02s.14
RA (bottom/right)	02h26m44s.71
RA (bottom/left)	02h21m50s.98

Dec (center)	+61°27′18″.4
Dec (top/left)	+60°03′42″.5
Dec (top/right)	+62°09′23″.8
Dec (bottom/right)	+62°49′52″.7
Dec (bottom/left)	+60°41′32″.10

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