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Monday, October 29, 2018

Clouds of Swan



A new photo from last night. Detail shot from the central area of the Cygnus nebula complex.


Clouds of Swan
Please, click for a large image

Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen. 


An experimental starless version
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The details of gas formation are standing out better in this starless version.


A two panel mosaic
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My older photo of central Cygnus was overlapping with the new image, so I was able to build a two frame panoramic mosaic.


Orientation in Cygnus Nebula complex
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The area of two panel mosaic is marked as a white rectangle.

Technical details

Processing workflow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f10 with 0,7 focal reducer for Edge HD 1100 telescope

Mount
10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AOL

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

Exposure times for both panels together

H-alpha, 9 x 1200 s, binned 2x2 = 3 h
O-III, 3 x 1200 s, binned 4x4 = 1 h.
S-II, 3 x 1200 s. binned 4x4 = 1 h


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