Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's nebulae  ·  Cigar galaxy  ·  M 82  ·  NGC 3034
M82 - Cigar Galaxy, Stephen Charnock
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M82 - Cigar Galaxy

M82 - Cigar Galaxy, Stephen Charnock
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M82 - Cigar Galaxy

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Description

This image contains Ha, R, G and B subs. Eight exposures of 300s in each filter were collected. I was not overly happy with the noise in the originals and certainly processing this image took a lot of time and clearly a large amount of noise is still present. Nevertheless, it was an exercise in perseverance and I have to be relatively happy getting a reasonable image at all. One particular issue that I came across and left me feeling that the calibrated images were not being processed well was the large number of hot pixels present in stacked images. Some of the options available in Deep Sky Stacker did enable me to eliminate most of these.

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M82 - Cigar Galaxy, Stephen Charnock

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