M101 - Pinwheel galaxy (Christian Bennich)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: HD122865 · 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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M101 - Pinwheel galaxy

Revision title: First try with continuum subctraction in the HA channel

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M101 - Pinwheel galaxy

Revision title: First try with continuum subctraction in the HA channel

I am so often amazed by the depth of knowledge and skill that can go into processing astro data.
This is my first galaxy of the year, and only the second time trying to image a galaxy with my ASI2600.

The process of learning how to create and use different techniques to bring out different details in the data are among the things in the hobby I love the most.

For this image, I learned about continuum subtraction when processing the HA data.
I watched several videos on applying HA data to my LRGB image, but not until I watched Adam Blocks instruction on the topic, did I actually begin to understand the intricate details of the Pixelmath statements used, and how to better subtract background and noise in the HA data.

Original
B
Final
C

B

Title: Adding HA data - No continuum subtraction

Description: Adding HA data into the image. This did not end up exactly as I wanted it.
It turned out, that I did not actually understand the value of doing additional processing of my HA channel, prior to merging the HA data into my LRGB image.

Uploaded: ...

C

Title: First try with continuum subctraction in the HA channel

Description: HA data now processed with continuum subtraction.
Need another few tests on this - lots of room for improvement still.

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	9492783
PixInsight job	E7BI5FNN39I7KZ1QQFZE4V0AR32WIHPK
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	14h03m12s.667
RA (top/left)	14h06m20s.411
RA (top/right)	14h02m27s.977
RA (bottom/right)	14h00m06s.360
RA (bottom/left)	14h03m56s.700

Dec (center)	+54°21′04″.46
Dec (top/left)	+54°29′32″.60
Dec (top/right)	+54°48′56″.16
Dec (bottom/right)	+54°12′16″.83
Dec (bottom/left)	+53°53′09″.81

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M101 - Pinwheel galaxy

Revision title: First try with continuum subctraction in the HA channel

M101 - Pinwheel galaxy

Revision title: First try with continuum subctraction in the HA channel

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M101 - Pinwheel galaxy

Revision title: First try with continuum subctraction in the HA channel

M101 - Pinwheel galaxy

Revision title: First try with continuum subctraction in the HA channel

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