M-101 (TortoiseRevenge)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 101 · NGC 5457 · NGC 5461 · NGC 5473 · NGC 5485

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M-101

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M-101

~6 poor hours on the cosmic Pinwheel.

Had some absolutely horrible hot/warm pixels that I've been getting when the ambient temperature is below -5 C. For reference, a stretched single light frame is shown in the revision B, you might not be able to see it, it looks like noise, but it is a layer of "warm" pixels above the layer of actual noise. I have relevant dark frames for the sensor temp, but not ones with this effect, so I had to do some cosmetic correction magic. After calibration frames (including darks), cosmetic correction still had to correct about 3 in every 48 pixels (yay!). Regardless, here's a wide view of the Pinwheel and the surrounding region.

If you have any other ideas what these pixels might be from - let me know.

Final
Original
B

B

Title: Single Cropped Light with stretch and VNG Debayering - lots of Hot Pixels

Description: This is the number of pixels on M101 itself alone

Uploaded: ...

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Basic success
Started	...
Astrometry.net job	7263329
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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