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Wednesday, December 12, 2012

The Wizard Nebula reprocessed



I reprocessed this image since weather doesn't support imaging up here and my processing work flow is somehow different now. My new work flow produces much softer images, I think.



NGC 7380, Sh2-1142, the "Wizard Nebula", in Cepheus
Ra 22h 47m 0s Dec +58° 06′ 00″

Sh2-142 alias NGC 7380, in mapped colors, from the emission of ionized elements,
 R=Sulfur, G=Hydrogen and B=Oxygen.





A closeup




Info


NGC 7380 is a catalog number of  the open star cluster inside Wizard nebula, SH2-142.
Nebula locates in constellation Cepheus, about 7000 light years from my home. 



Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.



An experimental starless version

This image shows just the gas formation, without stars interfering. 



Previous version
same raw data is used here





Technical details:

Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.
Levels, curves and color combine in PS CS3.

Telescope, Meade LX200 GPS 12" @ f5
Camera, QHY9 Guiding, SXV-AO @ 6,5Hz
Image Scale, 0,75 arcseconds/pixel
Exposures H-alpha 15x1200s, binned 1x1
S-II 1x1200s, binned 4x4
O-III 1x1200s, binned 4x4
Beside data here, a color information from an older wide field image is used.
Image can be seen here: http://astroanarchy.blogspot.fi/2011/02/sh2-142-wizard-nebula-wide-field.html



A study about an apparent scale in a sky







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