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Do It Yourself Jellyfish (IC443) Data

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#1 astrovienna

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Posted 07 March 2013 - 11:49 PM

This project started in November and didn't finish until February, as most of the clear nights we've had this winter have been too windy for imaging. Tonight, for example. :bawling: This is 18 hours via a CPC1100/SXVR-H694. Full details are with the image on the pBase site.

http://www.pbase.com...image/149029455

I'm still getting narrowband figured out, and this one seems a bit garish to me, maybe because the SII signal is so strong. I'd be very interested in seeing your processing of the data. For anyone who wants to try it, a zip file of the calibrated stacks is here:

https://www.dropbox....43RawStacks.zip

Kevin

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#2 rigel123

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Posted 08 March 2013 - 03:17 PM

Looks pretty good to me!

#3 Sonya

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Posted 08 March 2013 - 04:07 PM

Looks like spun gold, very nice...

#4 cclark

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Posted 08 March 2013 - 05:02 PM

I am still new to NB processing, but I gave it a try. You have some really great data! Thanks for posting and letting me get some experience.


Chris

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#5 LazyLightning

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Posted 09 March 2013 - 03:49 AM

The "smokey" look this nebula has was very well maintained, looks good!

#6 Peter in Reno

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Posted 09 March 2013 - 04:24 PM

Hi Kevin,

Here's my quick process of your data. It's probably a little over-processed since I have no idea what this DSO is supposed to look like. I have never seen this DSO before.

You have fantastic data and it was not too difficult to process it. It was processed entirely with PixInsight.

Peter

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#7 Peter in Reno

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Posted 09 March 2013 - 04:45 PM

Here is my second try but less over-processed. I didn't do any noise reduction which can cause over smoothing. Your image has good enough data not to do noise reduction.

Peter

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#8 Dr Benway

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Posted 09 March 2013 - 06:45 PM

HST Palette using Annie's Actions Hubble Palette Creation. Processed in PixInsight and Photoshop CS6.

John

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#9 astrovienna

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Posted 10 March 2013 - 11:52 AM

Thanks, everyone. It's always very interesting to see how other people process the data. As for me, I used the standard ESO Colour Composite action for the color merge, and as I'm sure you can guess I stretched the curves on the OIII/blue pretty hard. I also added one part of Bob Franke's gold-turquoise action to shift the green to slightly orange-gold. Then I used JPM's StarRemove action to create a starless layer, subtracted that from the original to yield a stars-only image that I used to mask out the stars prior to deconvolution of the nebulosity with AstraImage. All in all a pretty good learning experience.

Peter, despite 40 years in this hobby I never heard of this target before I began imaging. Seriously, the Jellyfish Nebula? :question:

Kevin

#10 Peter in Reno

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Posted 10 March 2013 - 12:12 PM

Why didn't you say it was a Jellyfish Nebula in the first place? :smirk:

I Googled for sample photos of Jellyfish Nebula and it looks like you only got half of it which is probably why I didn't recognize it.

http://bf-astro.com/ic443sho.htm

Peter

#11 neptun2

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Posted 29 March 2013 - 08:04 AM

Here is also attempt from me to construct pseudo RGB using following method:

R = 100%Ha + 33%SII , G=OIII , B= 100% OIII + 33%Ha

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#12 steveyzh

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Posted 29 March 2013 - 04:50 PM

Hi Kevin,
Thanks for sharing. The data was good. And this is my result.

Steve

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#13 steveyzh

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Posted 29 March 2013 - 05:38 PM

Here is another version, following J-P Tone mapping processing. Thanks.
Steve

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#14 Harel_Boren

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Posted 30 March 2013 - 06:00 AM

Lovely image - in all versions!!!
Cheers,
Harel






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