Standard Deviation of the Gauss Mask of the Grating component

OS (e.g. Win10): MacOs 10.14.6
PsychoPy version (e.g. 1.84.x): v2020.2.8
Standard Standalone? (y/n) If not then what?: y
What are you trying to achieve?:

Good afternoon, can you please let me know what is the standard deviation of the default gauss mask in the Grating component of the Builder? I need to report it in a paper and I would like to know how to calculate it relative to my stimulus size.

Thank you

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