Author Topic: Poor results after applying master flat to my lights  (Read 1009 times)

Offline rtemen

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Re: Poor results after applying master flat to my lights
« Reply #15 on: 2017 May 25 12:21:06 »
Hi, Gerald and Rob.
I had 10 to 15 lights of M63, but the others failed on tracking and so I deleted the bad ones and kept these 5.
So, I decided to start fresh on a different set of files and apply all of the help given me in this thread.

I will post my results if I succeed in making things better.

Rich

Offline oldwexi

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Re: Poor results after applying master flat to my lights
« Reply #16 on: 2017 May 25 12:50:00 »
Hi Rich!
If you restart exposures please keep in mind:
you Need much more raw Bias Frames, also more raw Darks and i would say a minimum of 15 good guided  usable lights.
Also for the flats - when i blinked your single flats they show variations in brightness at different areas
of the image - use a white uniform light source. (White notebook screen is not the right tool)

This makes your life during image processing much more easy.
Gerald



 

Offline rtemen

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Re: Poor results after applying master flat to my lights
« Reply #17 on: 2017 May 25 15:12:11 »
Hi, Guys.
Well, I followed all of your advice (both of you) and I did seem to get better results.
Now, I processed the image with some basic procedures and resulted in this.
https://www.dropbox.com/s/lpy71jsjzo0vosa/M51_Integration_DBE.tif?dl=0
Next might be a better processing workflow to really fine tune things.

Rich

Offline rtemen

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Re: Poor results after applying master flat to my lights
« Reply #18 on: 2017 June 12 22:19:21 »
Hi, Gerald.
Well, I did not have time to set up the files as you requested in your previous threads.
However, I did take some more pictures last night of M57.
Here is the link to all of the files.
https://www.dropbox.com/sh/99v83cx7otkskye/AAAi1nIvQZ-wFvlrf8gNMoJMa?dl=0
The Bias and Dark I rebuilt using your instructions.  Let me know if they are OK.  If Not, I can send all the raw files for the bias and darks as well. But I think they are OK.

Thanks for looking at these.