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Instrument |
12.5" RCOS @
~f/9 (2880 mm fl) 1.28 arcsec / pixel. The Zoomify image scale
is 1.28 to 3.07 arcsec / pixel. |
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Mount |
Paramount ME |
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Camera |
SBIG STL-11000 w/ internal filter wheel, AstroDon Gen II Filters |
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Acquisition Data |
7/20/2011 to 8/21/2011 Chino Valley, AZ... with CCDAutoPilot3
& CCDSoft. AOL guided |
|
Exposure |
Ha 540 min.
(18 x 30 min. each, binned 1x1)
OIII 630 min.
(21 x 30 min. each, binned 1x1)
Ha:OIII:OIII mapped to
r, g & b.
Click
here for narrow band color mapped images.
Click
here for an Ha filtered b/w image. |
|
Software |
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CCDSoft, CCDStack,
Photoshop CS and Noel Carboni's actions.
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PixFix32 (pre-beta) to
repair column defects.
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CCDStack to calibrate,
register, normalize, data reject, combine the sub exposures and
create the color image.
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PhotoShop for
on-linear stretching.
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Noiseware Pro, a PhotoShop plug-in.
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Comment |
North is to the left.
The Tulip Nebula, or
Sharpless 101 (Sh2-101) is located in the constellation Cygnus. The
emission nebula is about 6,000 light-years for Earth. It was
catalogued by astronomer Stewart Sharpless in 1959.
This synthetic color
image is similar to the true RGB color.
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