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Thursday, October 29, 2015

Filaments of Cygnus, project continues

At night of 27. October I managed to shot some new lights for this interesting area in the Western Cygnus. Speeding clouds ruined most of my imaging session but I got just enough exposures to make this two frame mosaic. At some point, I'll shoot more data for O-III and S-II, at the moment the signal is extremely low. I got it processed by using the powerful Tone Mapping v2 workflow.

Filaments of Cygnus, a two frame mosaic
Please, click for a large image

Image in mapped colors from the light emitted by ionized elements. 
Red=Sulfur, Green=Hydrogen and Blue=Oxygen.

Image in visual spectrum
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Natural color composition from the emission of ionized elements. 
This palette is very close to a visual spectrum.

A starless view 
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Complex structures of the ionized gas stands out nicely in this experimental starless view.

Please, click for a large image

The central portion shows some complex gas filaments

Ring Of Fire
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Image description

Love is a burnin' thing,
And it makes a fiery ring
Bound by wild desire
I fell into a ring of fire.

I fell into a burnin' ring of fire

I went down, down, down
And the flames went higher,
And it burns, burns, burns,
The ring of fire, the ring of fire.
(Johnny Cash - Ring Of Fire, Lyrics by June Carter )

I noticed this ring back at November 2011. At the time I was shooting a less known area at the Western Cygnus. This looped gas formation got my attention. The "Cirrus of Cygnus" was a small part of the large mosaic image of the Cygnus nebula complex.

Few days ago, I got an email from Sakib Rasool. He told me, that a French astrophotographer Pascal Le Dû has reported this as a new planetary nebula or supernova remnant candidate, Du 2. More info here:

Here is an animation from November 2011, I made it to get a better view to this formation.

Image was taken at November 2011. I removed the stars to see the actual nebula better.
Canon EF 200mm f1.8 optics, QHY9 astro camera and Baader narrowband filters.

Images in this post are a small part of the Cygnus nebula complex
Please, click for a large image, 2200 x 1400 4,2MB

A 18-panels narrow band mosaic of the constellation Cygnus overlaid with Cartes Du Ciel screenshot.. Area of interest can be seen at about eleven o'clock  position in this image as a blue regtangle.

Technical details

Processing work flow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 21 iterations, added at 25% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f7 with 0,7 focal reducer for Edge HD 1100 telescope

10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x2 and SXV-AOL

Astrodon filter, 5nm H-alpha
Astrodon filter, 3nm O-III
Astrodon filter, 3nm S-II

Exposure times
H-alpha, 24 x 1200s = 8h
O-III, 4 x 1200s binned = 1h 20min.
S-II,  4 x 1200s binned = 1h  20min.
Total 10h

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