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Saturday, November 17, 2012

Witch's Broom Nebula

Filaments in the Western Veil
Supernova remnant in Cygnus

Image is in visual spectrum, composed from H-a and O-III narrowband channels.

This is a third detail image from the Veil Nebula supernova remnant from this Autumn season.
Two others can be seen here, IC 1340 in Eastern Veil and the Pickering's Triangle.

This portion of the Veil Nebula is technically as NGC 6960 but less formally as the Witch's Broon Nebula.
The Veil Nebula locates in constellation Cygnus at distance of about 1400 light years. The angular size of the image is close to size of the full Moon. The bright star at upper right corner is 52 Cygni, it's a foreground star and unrelated to the supernova remnant.


Area of interest is marked as a white rectangle.

Image in HST-palette

I made a HST-palette version out of this. I have shot the Veil Nebula with much wider field instruments, Tokina AT-X 300 f2.8 and the Canon EF 200mm f1.8 cameraoptics. I took the color information from the wide field image and used it with this detail image. Here is the result.

Colors for this HST-palette image are borrowed from a wider field one, image can be seen here:

An animated image shows the difference between ionized Oxygen and Hydrogen

Click for a large image

Technical details:

Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated 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 8Hz
Image Scale, ~0,8 arc-seconds/pixel
15 x 1200s exposures for the H-alpha, emission of ionized Hydrogen = 5h
6 x 1200s exposures for the O-III, emission of ionized Oxygen = 2h
4 x 1200s exposures for the S-II, emission of ionized Sulfur = 1h 20min.

1 comment:

John said...

Another beautiful image!