PixInsight Forum (historical)

PixInsight => General => Topic started by: sreilly on 2019 November 21 19:15:07

Title: M76 Narrowband and LRGB Data
Post by: sreilly on 2019 November 21 19:15:07

So I've got a ton, well a fair amount, of data on M76 with the following:

16 - 15 minute red
16 -15 minute green
23 -15 minute blue
71 - 15 minute luminance

42 -30 minute Ha
41 -30 minute S2
40 - 30 minute O3

I have followed Karyon's tutorial at https://www.lightvortexastronomy.com/tutorial-narrowband-hubble-palette.html (https://www.lightvortexastronomy.com/tutorial-narrowband-hubble-palette.html) and came up with the S2HaO3 as attached.

The LRGB of M76 is also attached. What I'm curious about is if the data can be combined to show more detail in the nebula. I'm as green as they come with narrowband processing and maybe M76 wasn't a good target but.....any suggestions? I mean this is 61 .5 hours of NB data and 31.5 hours of LRGB. What could be done with 93 hours of total data. Just for the record, these were imaged with an STL-11000 CCD through a 12.5" OGS RC telescope on an AP1200GTO mount.

Suggestions, links to tutorials, anything?

Thanks,

Steve

Title: Re: M76 Narrowband and LRGB Data
Post by: sreilly on 2019 November 21 19:16:18

And the LRGB image

Title: Re: M76 Narrowband and LRGB Data
Post by: John_Gill on 2019 November 21 22:14:27

Hi Steve,

Great image!  Have you done a Deconvolution on the Lum and/or Ha, cos that will bring out faint detail.

space is not black
John

Title: Re: M76 Narrowband and LRGB Data
Post by: sreilly on 2019 November 22 06:13:29

John I did attempt to do deconvolution but my attempts were proving futile. I kept getting sharper stars but ghosting around them. Not dark ringing but rather light buffers, if that makes any sense. Maybe I'll try again and poty an example. I usually use 0.03-0.04 as the dark setting but I'll post a screen capture of the process once I setup a few previews and run a few tests.

-Steve

Title: Re: M76 Narrowband and LRGB Data
Post by: sreilly on 2019 November 22 11:28:17

While I still play with the LRGB data I realized I hadn't preformed any HDRW and I usually do 2 iterations typically being 3 and the 5 layer. This definitely brought out faint detail in the luminous data.

Title: Re: M76 Narrowband and LRGB Data
Post by: alexxw24 on 2019 November 24 09:03:30

Hi Steve,

giving the extensive amount of data with 93 hrs with an 12,5” scope I could imagine much more galactic dust and faint Ha or OIII clouds to be visible in the image. Maybe some enhancement of large structure / layers could help.

Anyway fantastic resolution and smooth processing.

Cheers,
Alex