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Contains:  M 87, NGC 4486, NGC 4477, NGC 4473, NGC 4461, NGC 4459, NGC 4438, The Eyes, NGC 4435, NGC 4425, NGC 4413, M 86, NGC 4406, NGC 4402, NGC 4388, M 84, NGC 4374
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Markarian's Chain - 8" RASA Luminance Only Test, 





    
        

            Uwe Deutermann
Markarian's Chain - 8" RASA Luminance Only Test

Markarian's Chain - 8" RASA Luminance Only Test

Technical card

Resolution: 3520x4656

Dates:March 12, 2019

Frames:Astronomik CLS CCD 2": 46x120" (gain: 139.00) -20C bin 1x1

Integration: 1.5 hours

Darks: ~50

Flats: ~25

Bias: ~50

Avg. Moon age: 5.44 days

Avg. Moon phase: 29.94%

Bortle Dark-Sky Scale: 6.00

Temperature: 16.00

Astrometry.net job: 2586008

RA center: 186.934 degrees

DEC center: 13.199 degrees

Pixel scale: 1.992 arcsec/pixel

Orientation: 352.212 degrees

Field radius: 1.615 degrees

Locations: Home Observatory, Fleming Island, Florida, United States

Data source: Backyard

Description

Wanted to find out how the 8" RASA does with galaxies and what better to image than the Markarian's Chain to take advantage of the wider field. The result is so la la, luminance alone is of course not the final answer, a color camera would be better. I will revive my Altair 183C for the next try, smaller field, but it will be in color. Another BIG problem is that I will need flat files (did not need those with the narrow band filters!), and I am not quite sure how to obtain them with the camera in the front of the scope. I will try the dusk/dawn method, maybe this will be already good enough. The image here was severely processed to get rid of all the gradients. A closer look at the galaxies also reveals that the RASA is not necessarily the best scope for these targets.

Comments

Author

udeuterm
Uwe Deutermann
License: Attribution-NonCommercial-ShareAlike Creative Commons
1073
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Revisions

  • Markarian's Chain - 8" RASA Luminance Only Test, 





    
        

            Uwe Deutermann
    Original
  • Final
    Markarian's Chain - 8" RASA Luminance Only Test, 





    
        

            Uwe Deutermann
    B

B

Added finally Flat files which made a big difference (thanks Michael, worked perfectly!).

Sky plot

Sky plot

Histogram

Markarian's Chain - 8" RASA Luminance Only Test, 





    
        

            Uwe Deutermann

In these public groups

ZWO ASI1600MM/QHY163M