|
Exposure |
Ha 480
min. (16 x 30 min. bin 1x1)
OIII 480
min. (16 x 30 min. bin 1x1)
Lum 180 min. ( 6
x 30 min. bin 1x1)
RGB 180 min. ( 4
x 15 min. bin 2x2, each)
Ha:OIII:OIII + 20%[LRGB]
Click
here for the b/w Ha filtered image.
Click
here for a narrowband color mapped version. |
|
Software & Processing Notes |
CCDSoft,
CCDStack, Photoshop CS w/ the Fits Liberator plugin and
Noel Carboni's actions.
PixFix32 (pre-beta) to
repair hot/cold pixels and column defects.
CCDStack to calibrate, register,
normalize, data reject, combine sub exposures & color combine for
the LRGB.
PhotoShop CS3 for
non-linear stretching,
Ha:OIII color combine and the addition of the LRGB color data.
Processing Notes:
The LRGB was used for star colors and to enhance the blue areas a
bit. Most of the color comes from the Ha:OIII:OIII mapping to
R,G & B. |
|
Comment |
The image is rotated
130 degrees CCW.
Although taken with
narrowband filters, the image is a pretty good representation of RGB
colors. Using narrowband filters greatly enhances the detail.
This image shows the
Cygnus Wall, in the southern part of the North American Nebula...
NGC 7000. The emission nebula is in the constellation Cygnus, at a
distance of about 1600 light years. When shown rotated 130 degrees
CCW, the Cygnus Wall becomes the Cygnus Mountains. This area of the
Nebula, correlates geographically to southern Mexico. The famous
wall, an energized shock front, provides contrast to the adjacent
dark "Gulf of Mexico" area, filled with dark gas and dust lanes.
Discovered by William
Herschel on October 24th 1786 from Slough England.
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