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FWHM values for images
Posté : 19 mai 2023, 23:13
par dan_adrian
Hello,
I am using the English version 11 of Prism.
When I select Analysis -> Quality check (stelar images), the resulting table does not compute the FWHM of my stars in a few images.
How do I set Prism to compute the FWHM of stars in the image?
Thank you.
Re: FWHM values for images
Posté : 20 mai 2023, 18:03
par Cyril Cavadore
I need to see an image. Please share one.
If you have a FWHM > 15 pixels this will not work and indicate that you MUST bin your image and have a proper sampling rate.
Re: FWHM values for images
Posté : 20 mai 2023, 21:29
par dan_adrian
Sure, here is a link to a couple of fits files:
https://drive.google.com/drive/folders/ ... share_link
Thank you very much.
Re: FWHM values for images
Posté : 21 mai 2023, 09:53
par Marc DELDEM
No problem with yours images (Prism 32 bits version 11.2.3.21)
Centroid Settings:
Analyze Settings:
Results:
Marc
Re: FWHM values for images
Posté : 21 mai 2023, 13:56
par dan_adrian
Thank you I will try with those settings. My original settings was with "whole image". I will try 1/2 central zone
Re: FWHM values for images
Posté : 22 mai 2023, 20:41
par dan_adrian
I tried your settings Marc . In order to compute the FWHM, I have to check the option "Seeing computation area defined as above"("Caculs de seeing Sur zone define ci dessus").
With that option checked everything works.
Thank you.