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Tuesday, October 15, 2013

First light for the Autumn Season 2013, NGC 6992

In this year it took some time to have a real first light for the season due to the weather up here 65N.
Image is exposed during several nights, 13.09 - 14.10,  between the speeding clouds.

NGC 6992
A portion of the Eastern Veil in constellation Cygnus.

Image is in mapped colors, from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
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NGC 6992, the Eastern Veil, is part of the Veil Nebula, a supernova remnant in constellation Cygnus at distance of about 1470 light years. This is one of the more luminous areas in this SNR. 
The shock front formed by the material ejected from giant explosion, the super nova, can be seen in this image.

Image in visual spectrum

Image is in Natural color palette from the emission of ionized elements,
R=Hydrogen + Sulfur, G=Oxygen and B=Oxygen + Hydrogen.
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A starless version

An experimetal starless image to show the actual nebula better.
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Location in Veil Nebula supernova remnant is marked with a white rectangle.
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An animated image

This animation shows the difference between emission lines. The target is shot three times for a RGB-color image.

Technical details

Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
A light, 33 iterations, deconvolution added at 50% weight in CCDStack2.
Levels, curves and color combine in PS CS3.

Optics, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO, an active optics unit, and Lodestar guide camera
Image Scale, ~0,8 arc-seconds/pixel
12 x 1200s exposures for H-alpha emission = 4h
18x 1200s exposures for O-III, emission of ionized Oxygen = 6h
12 x 1200s exposures for S-II, emission of ionized Sulfur = 4h
Total exposure time 14h.


A collection of Veil Nebula details from the past
A blog post about this poster and links to an original images can be found HERE

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