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Instrument |
12.5" RCOS @
~f/9 (2880 mm fl) 0.643 arcsec / pixel. Zoomify image scale is
0.86 to 3.07 arcsec / pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/ internal filter wheel, AstroDon Filters |
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Acquisition Data |
3/13/2009 to 3/24/2009 Chino Valley, AZ... with CCDAutoPilot3 & CCDSoft. |
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Exposure |
Lum
375 min (25 x 15 min, bin 1x1)
RGB
225 min ( 5 x 15 min each, bin 2x2) |
|
Software |
-
CCDSoft, CCDStack,
Photoshop CS w/ the Fits Liberator plugin. Noel Carboni's actions
and Russell Croman's GradientXTerminator.
-
eXcalibrator for (u-g), (g-r) color calibration, using 7 stars from
the SDSS 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, LRGB
color, and luminance deconvolution.
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PhotoShop for LLRGB
combine &
on-linear stretching.
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Comment |
North is to the top.
Sir William Herschel
(1738-1822) discovered NGC 4565. Also known as the Needle Galaxy,
NGC 4565 is about 40 million light-years away, in the constellation
Coma Berenices. The galaxy's nearly edge on alignment presents a
spectacular view of the dust lanes intersecting with the core. The
bright central core get its color from the dominance of older
yellowish stars.
The galaxy to the lower right is NGC 4562. It's about 75 million
light-years away, and like NGC 4565, spans about 100,000
light-years.
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