M 101 B 2x2 test shot (Jason Fields)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 101 · NGC 5447 · NGC 5449 · NGC 5450 · NGC 5451 · NGC 5453 · NGC 5455 · NGC 5457 · NGC 5461 · NGC 5462 · NGC 5471 · NGC 5477 · Pinwheel galaxy

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M 101 B 2x2 test shot

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M 101 B 2x2 test shot

First raw frame of M 101 in blue light. I’ve stretched the contrast super hard and there is a lot of detail and not much camera noise. Minimal calibration applied: hot pixel removal and saturation blooms removed.

A few things that I like about this image and this CCD:

- There are no halos around bright stars (had an issue with a different filter set)

- No obvious stray light; e.g., from the bright star just on the edge of the field at bottom

- Successfully removed saturation blooms without introducing unacceptable noise

- The image is unguided (thank you, 10 micron!)

- The pixel fill factor is 100%. Although there are micro lenses on this CCD camera, there are no unpleasant little diffraction spikes around stars like the ones that occur on the KAF-8300 and other CCDs and CMOS devices (see for instance my image of the Horsehead and look at Alnitak). It may be that the ABG drains contribute to that effect.

Original
Final
B

B

Description: 20x8-min mean coaddition with a master dark (mean of 88 frames) and a quick removal of saturation blooms. Still need to collect more frames and work on the image processing.

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Status	Advanced success
Started	...
Astrometry.net job	2616252
PixInsight job	C4FTVWFPOEYETVEOCLCBBSMCZ093X2JJ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	14h03m11s.12
RA (top/left)	14h00m09s.11
RA (top/right)	14h06m13s.94
RA (bottom/right)	14h06m15s.58
RA (bottom/left)	14h00m05s.13

Dec (center)	+54°19′56″.10
Dec (top/left)	+54°01′55″.6
Dec (top/right)	+54°02′09″.4
Dec (bottom/right)	+54°37′41″.3
Dec (bottom/left)	+54°37′27″.1

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M 101 B 2x2 test shot

M 101 B 2x2 test shot

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M 101 B 2x2 test shot

M 101 B 2x2 test shot

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