M106 - First steps in Ha ! (Ewam)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: IC 913 · M 106 · NGC 4248 · NGC 4258

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M106 - First steps in Ha !

VERSION C & D > NEW acquisition from 23:00 on late Sunday the 17th till around 2:00am...

Look at the gain in detail within the core mainly !

VERSION A & B : Here is my previous work on M106 with this last night's Ha acquisition. I still have issues on the background stars being "polluted" by the red halo - should probably not use it at all. It also grabs any high layers of even the thinnest clouds, so I had to through some subs... Noise level was high with the warm spring night, so I spent more than an hour just to clean this.

Same spec as in previous + 9x 450 sec @ 3200

> VERSION E : more subs (Ha & broadband) and heavy crop.

> VERSIN D : maybe C looks more "natural" but I wanted to regain the color contrast achieved on the previous attempt, without destroying too much the "purity" of the grain...

> VERSION C : last night (the 18th) we had a couple of hours of "one of these skies!" - a rare near perfect (belgium) seeing. I could take 16 subs of 150 sec @ 1600, of which I used the 10 best ; then I put on the Ha filter and grabbed another 16 but only 8 proved useful...

As a near beginner (although obsessive worker), I must confess that I'm quite pleased with this work now !

Original
B
C
D
Final
E

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Status	Basic success
Started	...
Astrometry.net job	648570
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M106 - First steps in Ha !

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