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SH2 114, The Flying Dragon, Emerging From the Smoke of Its Destruction.  OSC Image, Alan Brunelle
SH2 114, The Flying Dragon, Emerging From the Smoke of Its Destruction.  OSC Image, Alan Brunelle

SH2 114, The Flying Dragon, Emerging From the Smoke of Its Destruction. OSC Image

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SH2 114, The Flying Dragon, Emerging From the Smoke of Its Destruction.  OSC Image, Alan Brunelle
SH2 114, The Flying Dragon, Emerging From the Smoke of Its Destruction.  OSC Image, Alan Brunelle

SH2 114, The Flying Dragon, Emerging From the Smoke of Its Destruction. OSC Image

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Acquisition details

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Description

First: Data acquisition details: a) 66, 180 sec subs led to one integrated stack.  b) 44, 360 sec subs led to another integrated stack.  So a total of 7.7 hrs of integration time.  More time than I had remembered, and likely felt bad considering I thought this was a bust.  Especially for someone who has precious few nights to get anything.

Second, I owe credit to this image to @John Favalessa and his wonderful post "LBN576 on a self dare".  He inspired me to revisit this data, which I luckily did not discard from over a year ago!  His mouseover touched a nerve with me and reminded me that I had data that looked a lot like his data prior to putting effort in.  In honor of his post, I also provide a mouseover of what I try to represent how the stacks looked to me with simple stretch.  However, I cannot lay claim to the same level of bravery, since I was just a fool trying to image this beast in One Shot Color.  In fact, I perused the AstroBin library of SH2-114s to see if I could find any OSC images, and there were none that tried to image without a dual band filter or such someother.  In fact there were few that state that they applied RGB with narrow band (primarily HII), but it is clear the RGB components really were not the dominant signal attained in all these images.  Proof positive is the dearth of images with the IFN "smoke of destruction" trailing the beast as it flies away from its deed.  In any case in July of 2021, it was not bravery that set me off to try to process this data.  I just gave up...

I have greatly streamlined my processing of late.  Tools such as Bill Blanshan's methods for star reduction and Russel Croman's StarXTerminator and NoiseXTerminator have changed the game in this regard.  So not me getting better with the methods, just the methods getting better.  So with the prospect of 6 months of cloudy skies ahead, it has become my mission to reprocess just about all of my rather smallish catalog that exists here on AstroBin.  But this is not a reprocess.  I never posted this data, which would have looked like a disaster at the time.  So this is a serendipity image.  And I think I got rewarded by doing so.  Its not that it is anywhere close to a technically spectacular image of this guy.  I think that I would probably need to double the integration time to rival some of the images I have seen.  But I think the complete surprise of seeing a clear IFN impose itself on this image offers more serendipity in having a minor discovery.  At least for me.  Unexpected because I see it in no narrow band images (can't expect it) and for some reason most who employed RGB seem to either not see it or at least didn't want it to show in their image.  In this image I chose not to try to bring up all the HII signal.  I did not want to detract from the dragon, itself, nor de-emphasize the IFN, which I think is a great balancer for the reds elsewhere.  But the darks are there for a reason.  Not unlike the backdrop to the Horsehead Nebula, or the Chrismas Tree Cluster, there is an incredible smooth velvety curtain of HII behind these fun features.  I suspect that these features are but wrinkels in the smooth hydrogen curtain that catch the UV sharply from some nearby bright star. 

I note that there are a few galaxies scattered throughout the field.  These clouds are typical of the rarified nature of the suburbs of the galactic plane.  Luckily, there were enough bright stars in the locale to gently nudge some hydrogen gas into emission.  I do believe that I find two reflection nebulae as well.  I cannot confirm this on any databases and it does not label them.  But one might be an IFN cloud overlaying a star, and the other may be some HII emission.

In Case Anyone Cares:
As you can tell, I stretched this a fair amount.  In fact all the major details showed themselves very well without such a strong stretch, however, I really wanted the dragon to be the highlight here.  This one for me is much more art than science this time!  So I don't care if two galaxies are blown out.  To get this to work, I did star reduction in the linear state for each of the 2 stacks.  The reduction was huge!  In Blanshan's standard mode one selects method strength values below 0.5, with lower values being the stronger effect.  His recomendation is set at 0.2.  Typically 0.15 is quite a strong reduction.  I used 0.02.  Of course none of this could work if no good starless image could be attained in the linear mode.  And StarXTerminator did a fabulous job.  Prior to this, dynamic crop was used just to get rid of some horrible edge stuff.  But since the two stacked images (360s and 180s subs) were done over several nights, I needed to follow up the early stuff with star alignment to register the overlapping images.  I did Linear Fit in preparation and then brought the two images together with HDR Composition.  Before HDR Composition, I found that Linear Fit did some bad things to the stars, so I destared the one image and used that to combine with the starred reference image.  Only a minor effect on the star brightnesses, if any.  Then I did DBE and Dynamic Color Calibration (Still have not got the Astrometric Calibration down).  A bit of NoiseXTerminating and then a first stretch.  And so on.  BTW, I have not used Deconvolution at all for all my recent images.  And find I have no need for using Morphological Transformation much for star work.  

Finally, I hope that this may encourage those with fast scopes and OSC cameras to actually give this a try!  And other targets such as this.  Be brave like John!  I know, who am I to speak?!  I had basically abandoned the data.  Heck, I even went out and bought a high speed H-alpha filter after this failure.  But I never had a chance to use it and still do not have a mono camera.  Those will come in due time.

Comments

Revisions

  • Final
    SH2 114, The Flying Dragon, Emerging From the Smoke of Its Destruction.  OSC Image, Alan Brunelle
    Original
  • SH2 114, The Flying Dragon, Emerging From the Smoke of Its Destruction.  OSC Image, Alan Brunelle
    B
  • SH2 114, The Flying Dragon, Emerging From the Smoke of Its Destruction.  OSC Image, Alan Brunelle
    C

B

Title: Semblance of what the stacks looked like with STF

Description: I tried to give this image of a stack the essence of what I was seeing after the 180s and 360s stacks upon STF. I did not proceed to process this after seeing this! Yes I could see a bit of signal other than stars, but this is a generous STF! I did not have much hope my star reduction skills at the time could overcome the stretch needed to get this in any kind of shape. At this point there was no indication I could get a decent completeness of the HII signal nor could I see the IFN that excited me very much after this process got underway.

Uploaded: ...

C

Title: Starless Version

Description: Need I say more?

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SH2 114, The Flying Dragon, Emerging From the Smoke of Its Destruction.  OSC Image, Alan Brunelle