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5
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Click the image for a 75% size
wider view. (2841 x
1776 - 1.13 MB)
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Instrument |
12.5" RCOS @
~ f/9 (2880 mm fl) at 0.64 arcsec/pixel. Shown at 0.85 and
1.55 arcsec/pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/
FW8 filter wheel & AstroDon Gen-2 LRGB filters. |
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Acquisition Data |
4/12/2015 to
4/2/2016 Chino Valley, AZ. with CCD Commander & CCDSoft. AOL
guided |
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Exposure |
|
Lum |
465 min (31 x
15 min. each) Bin 1x1 |
|
RGB |
900 min (20 x
15 min. each) Bin 2x2 |
eXcalibrator RGB ratios are 1.00,
0.81 & 0.93 |
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Software & Processing Notes
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CCDSoft, CCDStack,
PixInsight, Photoshop CS6.
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eXcalibrator
v5.0 for (g:r) color balancing, using
43 stars from the SDSS-DR9 database.
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CCDBand-Aid to repair
KAI-11000M vertical bars.
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CCDStack to
calibrate all sub exposures.
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PixInsight to
register, normalize, data reject, combine the sub
exposures, gradient removal, non-linear stretching with HistogramTransformation and to create the LRGB image. HDRMultiscaleTransform to enhance the detail
at the galaxy core.
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Noiseware 5, a PhotoShop plug-in.
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PhotoShop final touch-up
includes background noise reduction and selective sharpening.
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Comment
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North is to the top.
M95 (NGC 3351) is a
barred spiral galaxy about 50 million light-years away in the
constellation Leo. It was discovered by Pierre Méchain in 1781, and
catalogued by Charles Messier four days later.
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