FWHM values for images

[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.

[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.

[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.

[Marc DELDEM]

No problem with yours images (Prism 32 bits version 11.2.3.21)

Centroid Settings:


Analyze Settings:


Results:


Marc

[dan_adrian]

Thank you I will try with those settings. My original settings was with "whole image". I will try 1/2 central zone

[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.