M20_21 data to go

[Ryderscope]

I am very pleased and enamoured with the narrow band data for M20_21 that I've just pulled out of the pre processing can that I felt the need to share with others that may understand my excitement. I tried showing it to my better half but I did not sense the same enthusiasm < sigh >.

Attached is a copy of the Ha/OIII/SII channels to which I have cropped and given a very quick stretch only. I felt that there was a lot of interesting detail as they stand already so that it was worth posting at this early stage. I can already see that the Ha channel is going to be a challenge due to the very high dynamic range. Just proves again that no two images are the same when it comes to processing.

Anyway, for others that suffer the same compulsion as I do may you enjoy the data.

[strongmanmike]

Know exactly how you feel Rodney, great stuff and great looking data mate :thumbsup: Hope it comes together for you, assembling a pleasing looking narrow band image of the Trifid is no easy task :scared2:

Mike

[Ryderscope]

Thanks Mike, I don't have much of a feel for where this one will go nor how I may get there but we shall enjoy the journey all the same :)

[gregbradley]

Its coming along nicely. I look forward to the final result.

Greg.

[graham.hobart]

Very cool. I never thought to do this target in narrow band and it looks awesome. Thanks for the early look!
Graham :thumbsup:

[multiweb]

It's looking pretty sharp already. Blend should be good. :thumbsup:

[Ryderscope]

Thanks Greg, Graham, Marc.

[Placidus]

Oh yum! The [SII] looks especially fine. There is a large faint arc centred around the top right corner of the image which is relatively strong in [SII]. Perhaps it is a part of an old supernova remnant, nothing to do with the Trifid.

Can't wait to see how this one comes together.

[Ryderscope]

Thanks MnT. I’m going to have to do some research now on neighboring SNRs in Sagittarius :D

[Bart]

Good looking data there it seems. Keep at it. A narrowband version and a Ha OIII OIII version in the works?

[Ryderscope]

Thanks, to start with will be attacking this on as an SHO process. I have some RGB as well and want to try adding that in so will wait and see. I have to stop getting distracted on other projects though. I have at least three data sets in the bag now waiting for attention :D

[RickS]

Looks very promising, Rodney!

[Ryderscope]

I've been staring at the screen too long so it is time for this one to emerge into the light of day. Our Trifid has been nutured and cared for and it is now time for it to move out and meet others. We would appreciate your thoughts on the new addition :)

Mike S. made the observation that preparing a narrow band image of the Trifid would be " ... no easy task" ... He was right :scared2:

Details of image acquisition can be found in the Astrobin post her (https://astrob.in/363382/0)e. Click on image in Astrobin for high resolution.

Comments and critque welcome.

Cheers,
Rodney.

[peter_4059]

That looks good Rodney. I love the wider field of view and the NB adds a completely different look to the triffid.

Thanks for the view.

[Geoff45]

OK Rodney, it’s a great picture but I have to say that for me the Trifid has to be RGB. Too old to change my ways.
Geoff

[Ryderscope]

Thanks Peter and Geoff. If it helps Geoff, I have LRGB data as well which I will process and post the results soon :D

[RickS]

Looks great to me though I also have a LRGB bias when it comes to M20, Rodney.

[Ryderscope]

Thanks Rick. Do I need to add in Ha as well or is LRGB ok :D

[RickS]

Just calibrate to remove the bias, Rodney :lol:

[astronobob]

Thats great Rodney,
All over the top of my head; The 3 narrow band mono data's are indeed interesting ?
I like the resulting color too - no bias 'ere :thumbsup:
-------
A Question tho, I am uneducated in the varieties of capturing narrow-band sets and what is doing for final images, - Can I ask if you added the RGB's to a combined of all 3 Ha/OIII/SII channels; I guess yes, looks like data from all in the color final.

IF so, does you stack the Ha/OIII/SII channels 1st separately and then add the rgb's ? :question: Or do all rgb's & Ha/OIII/SII channels stack together :question:
Cheers

[Ryderscope]

Thanks for your comments Bob. To answer your questions, the Ha/OIII/SII masters were first created separately with each channel created from the associated calibrated and stacked subs (see Astrobin post for exposure details). That gave me three linear images as the starting point for processing. The processing then comprised the steps of; creating an enhanced luminance, creating the colour image, combining the colour image with the luminance and enhancing the final image.

The enhanced (monochrome) luminance is a greyscale image created from the addition of the three narrow band channels. The colour image is created by combining the three channels using a channel mix based on the Hubble Pallet (SHO=RGB). The colour image is then combined with the enhanced luminance. I use Pixinsight so I use the LRGB Combination Tool for this. This image is then enhanced by means additional colour saturation and some tweaking of hues using the Curves tool in PI.

Obviously this is snapshot Bob as the detailed processing includes noise management, stretching, colour balancing etc.

[astronobob]

Very well explained and thanx so much for your time in your reply, , Rodney, as I should be starting out in the mono capturing capers soon, the Gold Coast City Burbs are shocking for color cams :thumbsup:
Thanx again for your feedback :thumbsup:

[willik]

Hi Rodney
I have not seen a trifid like that before
Martin

[Ryderscope]

Thanks Martin. I was definitely trying something new (for me) on this one :)