Tag: M109

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A new processing of M109

My previous processing of M109 – 360x60s – did not turn out well. Serious issues with noise, most likely calibration files that were not ok.

So I did a complete re-build of the calibration files darks and bias.

The resulting stack and processed image is noticeably better:

M109, 360x60s Gain 0 Esprit120 F7 ASI2600MC Darks, Bias
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M109 galaxy in Ursa Major

This galaxy lies very very close to one of the bright stars of the bowl.

An integration on several nights with 60-second subs at gain 0. This resulted in a lot of (read-?) noise. I should experiment further with Gain 100.

M109 Ursa Major Esprit 120mm F7 no flattener ASI2600MC 360x60s Gain 0 Offset 50 no flats ; darks, bias

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