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2022-05-29: APP 2.0.0-beta2 has been released !

Release notes

Download links per platform:

windows 2.0.0-beta2

macOS x86_64 2.0.0-beta2

macOS arm64 M1 2.0.0-beta2

Linux DEB 2.0.0-beta2

Linux RPM 2.0.0-beta2

Andromeda...


(@suparnob)
Molecular Cloud Customer
Joined: 5 years ago
Posts: 7
Topic starter  

My learning continues. This is Andromeda -- essentially my second astrophotograph. Taken from my backyard in DC (bortle 8/9). I need to do better at removing light pollution.

Taken with a William Optics Redcat and ZWO ASI294MC Pro OSC, Takahashi PM-1X mount. 15X4 minutes each.

2019 Andromeda 1 PI

 


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(@vincent-mod)
Quasar Admin
Joined: 5 years ago
Posts: 4830
 

That's fantastic for a second photo! Did you use any calibration files?


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(@suparnob)
Molecular Cloud Customer
Joined: 5 years ago
Posts: 7
Topic starter  

Many thanks, Vincent! I did use some calibration files -- 30 each of bias, darks and flats. I suspect that my flats did not come out too well because when I stretch an individual flat (or the master flat), I do not see any gradation in the image, etc. I find it hard to believe that the scope has zero vignetting. I need to learn how to take proper flats. The darks, on the other hand, show an amp glow very clearly. 


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(@vincent-mod)
Quasar Admin
Joined: 5 years ago
Posts: 4830
 

Excellent, so when you think one of your calibration files is wrong, it's better to leave it out as it may have a bad influence on the endresult. Some more bias frames might also be helpful, as they're easy to make about a 100 is advised. But, really good start!


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(@suparnob)
Molecular Cloud Customer
Joined: 5 years ago
Posts: 7
Topic starter  

Thanks! Great advice and good to know... I should reprocess the image without the flats and see if it makes a difference (and also, increase the number of bias frames).


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(@vincent-mod)
Quasar Admin
Joined: 5 years ago
Posts: 4830
 

Yeah you will quickly see if it's better with or without, good luck!


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