M51 w IDAS unsharpened and sharpened (lowenthalm)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: IC 4278 · M 51 · NGC 5194 · NGC 5195 · Whirlpool galaxy

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M51 w IDAS unsharpened and sharpened

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M51 w IDAS unsharpened and sharpened

I have combined new data I took with my IDAS light pollution filter with the earlier M51 image I posted. The IDAS cuts out light pollution and also saturates colors, especially reds, which acts to highlight red nebula that emit mostly H-alpha. Seeing was about the same on both nights, so I thought I would post four versions:

A: The original unsharpened IRCut image (24 minutes across 4 images)

B: The newer unsharpened IDAS image (60 minutes across 6 images)

C: The unsharpened combined IDAS and IRCut data, added together with more contrast expansion..

E: The sharpened combined IDAS and IRCut data (iterative gaussian sharpening, 5 interations).

This nicely shows the difference between IDAS and just an IRCut image and also the

Original
B
C
Final
E

B

Description: This version is the image created with 60 minutes of IDAS filter data ("original" version A is the earlier image created with 24 minutes of IRCut data. )

Uploaded: ...

C

Description: This version combines 24 minutes of IRCut data (version A, "original") with 60 minutes of IDAS data (Version B), with further contrast expansion.

Uploaded: ...

E

Description: This is the sharpened version of image C (24 minutes IRCut + 60 minutes of IDAS). Compare to the unsharpened version C image as well as version A and B alone. I updated the sharpened version of the image, adding a slight bit of noise reduction.

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	2686183
PixInsight job	6D55SSG05729JBNSJTYSZJGG27B5NNP9
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	13h29m53s.591
RA (top/left)	13h31m05s.889
RA (top/right)	13h30m32s.540
RA (bottom/right)	13h28m40s.774
RA (bottom/left)	13h29m15s.500

Dec (center)	+47°11′33″.76
Dec (top/left)	+47°00′15″.64
Dec (top/right)	+47°26′53″.98
Dec (bottom/right)	+47°22′48″.46
Dec (bottom/left)	+46°56′12″.31

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M51 w IDAS unsharpened and sharpened

M51 w IDAS unsharpened and sharpened

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M51 w IDAS unsharpened and sharpened

M51 w IDAS unsharpened and sharpened

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