M81 & M82 LHaRGB - Feb 2018 (Geof Lewis)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Bode's Galaxy · Cigar Galaxy · M 81 · M 82 · NGC 3031 · NGC 3034

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M81 & M82 LHaRGB - Feb 2018

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M81 & M82 LHaRGB - Feb 2018

Another attempt at LHaRGB. I think this is somewhat overprocessed, maybe the Lum was stretched too much trying to tease out any IFN. I tried to keep on top of the stars by removing them for the galaxy stretch then adding them back later in the process. I used an inverse star mask with the Ha layer to try to restrict it to just the star formation regions of the galaxies.

Vers E & F - 2 years on in the midst of the CV lockdown I decided to reprocess the data from scratch. This time with improved processing skills I was able to reveal the extensive IFN in this region using just the original data from 2018 - see version E.

Having had success at extracting the IFN from the original data, I decided to go further and blended in the Hi Res images of M81 and M82 captured earlier this year - see version F.

Original
B
C
E
Final
F

B

Description: Increased saturation on M81 only

Uploaded: ...

C

Description: Luminance only data showing faint hint of IFN

Uploaded: ...

E

Description: Complete rework during CV lockdown to reveal IFN

Uploaded: ...

F

Description: Blended in HiRes galaxies captured in Jan and Feb 2020

Uploaded: ...

Galaxies

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Status	Advanced success
Started	...
Astrometry.net job	3546817
PixInsight job	L4RGDU5A3DVM9L7IH39W356KPUJLQIPZ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	09h55m19s.41
RA (top/left)	10h01m22s.25
RA (top/right)	10h03m44s.82
RA (bottom/right)	09h48m44s.92
RA (bottom/left)	09h47m29s.66

Dec (center)	+69°19′32″.3
Dec (top/left)	+68°24′11″.5
Dec (top/right)	+70°06′24″.3
Dec (bottom/right)	+70°13′52″.6
Dec (bottom/left)	+68°31′15″.2

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M81 & M82 LHaRGB - Feb 2018

M81 & M82 LHaRGB - Feb 2018

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M81 & M82 LHaRGB - Feb 2018

M81 & M82 LHaRGB - Feb 2018

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E

F

Sky plot

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