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Contains:  NGC 5477, NGC 5474, NGC 5473, M 101, NGC 5457, NGC 5422
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M101, 





    
        

            Arne Stocker
M101

M101

Technical card

Resolution: 3610x2475

Frames: 50x120"

Integration: 1.7 hours

Astrometry.net job: 2588975

RA center: 210.775 degrees

DEC center: 54.384 degrees

Pixel scale: 1.902 arcsec/pixel

Orientation: 289.849 degrees

Field radius: 1.156 degrees

Locations: holiday home, Brandenburg, Brandenburg, Germany

Data source: Backyard

Description

This picture of m101 was just a makeshift. I was originally taking pictures from rosetta nebular but when it comes near to horizon, I tried to do something useful with the remaining dark sky time.

I just get nearly one and a half our of m101 and did not plan, making anything of it yet. The integrated picture with a quick and dirty image processing looks like Version 'A'.

Then I read about starnet++ and wanted to give it a try. Starnet++ is a tool to remove stars, which based on self learning tensorflow (as far as I understand).

So I first removed the stars from the stretched image, then substract the starless image from the stretched image, processed them individually and put them together with pixelmath. This was quite fast, and I didn't have to hassle around creating fitting starmask, remove ringings, denoising artefacts and so on.

As a downside, NGC 5473 was a little bit corrupted. It seems, that starnet++ interpreted it as a star. I just stamped it out (shame on me), but I hope it's allowed, as this picture was only a proof.

So far I'm quite impressed of starnet++, which could make image processing much more easy.
Starnet++ was invented from Nikita (many thanks to him) and you can find a discription including a link to sourceforge here

Comments

Author

Arne
Arne Stocker
License: None (All rights reserved)
2061
Like

Revisions

  • M101, 





    
        

            Arne Stocker
    Original
  • Final
    M101, 





    
        

            Arne Stocker
    B
  • M101, 





    
        

            Arne Stocker
    C

B

combination of starless image and stars

C

starless image

Sky plot

Sky plot

Histogram

M101, 





    
        

            Arne Stocker