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Instrument |
12.5" RCOS @
~f/9 (2880 mm fl) 0.64 arcsec / pixel. The Zoomify image scale
is 0.64 to 3.52 arcsec / pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/ internal filter wheel, AstroDon Gen II Filters |
|
Acquisition Data |
10/28/2011 to 11/27/2011 Chino Valley, AZ... with CCDAutoPilot3
& CCDSoft. AOL guided |
|
Exposure |
Lum 420 min. (28
x 15 min. bin 1x1) best 28 of 39
RGB 495 min. (11 x 15 min. each, bin 2x2) |
|
Software |
-
CCDSoft, CCDStack,
Photoshop CS3, Noel Carboni's actions
and Russell Croman's
GradientXTerminator.
-
eXcalibrator for (b-v), (v-r) color balancing, using 12 stars
from the NOMAD1 database.
-
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
on-linear stretching
and LRGB combine.
-
Noiseware Pro, a PhotoShop plug-in.
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Comment |
North is to the top.
Abell 2666 is located
in the constellation Pegasus, at a distance of about 342 million
light-years. As Abell clusters go, 2666 is relatively small. At the
center is NGC 7768, the large elliptical galaxy that gravitationally
anchors the cluster.
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