M82, Cigar Galaxy, UHC-S+Hα, , 17 Feb & 9 Mar 2015, 2x Drizzle Stack (David Dearden)

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

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M82, Cigar Galaxy, UHC-S+Hα, , 17 Feb & 9 Mar 2015, 2x Drizzle Stack

I'm filling in these notes almost a week after the fact because I was so dissatisfied with the results that I wasn’t going to post them. There was a lot of Moon the night of 9 Mar, so I decided to see how M82 looks in Hα, thinking that might enhance the filaments that emanate from the galaxy. It didn't work very well, but it was fun to give it a shot. I had some guiding issues and also didn’t do a very good job of focusing, so the galaxy Hα experiment was not too successful. I did drizzle process these Hα images (in Nebulosity 3), and also tried drizzling my earlier (17 Feb 2015) UHC-S images (using Deep Sky Stacker; I couldn’t get it to look good using Nebulosity—DSS was just better for this image). Finally I scaled the two images in Nebulosity 3 and used a 50:50 combination of the R channel from the UHC-S image and the Hα as R in this final image, with most of the background from the UHC-S. Here it is for what it’s worth.

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Status	Advanced success
Started	...
Astrometry.net job	571502
PixInsight job	7VVOSQC3L55ZFMPIDEPM7BZXAKFZREUT
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	09h55m40s.38
RA (top/left)	09h58m24s.41
RA (top/right)	09h58m34s.34
RA (bottom/right)	09h52m51s.76
RA (bottom/left)	09h52m47s.60

Dec (center)	+69°41′08″.2
Dec (top/left)	+69°24′10″.5
Dec (top/right)	+69°57′28″.4
Dec (bottom/right)	+69°57′56″.5
Dec (bottom/left)	+69°24′54″.5

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M82, Cigar Galaxy, UHC-S+Hα, , 17 Feb & 9 Mar 2015, 2x Drizzle Stack

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M82, Cigar Galaxy, UHC-S+Hα, , 17 Feb & 9 Mar 2015, 2x Drizzle Stack

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