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Instrument |
12.5" RCOS @
~f/9 (2880 mm fl) 0.643 arcsec / pixel. The Zoomify image
scale is 1.28 to 3.09 arcsec / pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/ internal filter wheel, AstroDon Filters |
|
Acquisition Data |
10/24/2009
to 11/16/2009 Chino Valley, AZ... with CCDAutoPilot3 & CCDSoft. |
|
Exposure |
Lum
270 min (18 x 15 min, bin 1x1)
RGB
225 min ( 5 x 15 min each, bin 2x2)
Click
here
for the narrowband
color mapped versions.
Click
here for an Ha filtered b/w version. |
|
Software |
-
CCDSoft, CCDStack,
Photoshop CS w/ the Fits Liberator plugin. Noel Carboni's actions
and Russell Croman's GradientXTerminator.
-
eXcalibrator for (b-v), (v-r) color calibration, using 39 stars from
the NOMAD1 database.
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PixFix32 (pre-beta) to
repair hot/cold pixels and column defects.
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CCDStack to calibrate,
register, normalize, data reject, combine the sub exposures and LRGB
color.
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PhotoShop for LLRGB
combine &
on-linear stretching.
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Comment |
North is to the right.
The Bubble Nebula,
cataloged as NGC 7635 and Sharpless 162, is an HII emission region
in the constellation Cassiopeia, at a distance of about 11,000
light-years. The "bubble" is created by the stellar wind from a
massive young, hot, 8.7 magnitude central star. William Herschel
discovered the nebula in 1787.
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