Donut Shape PSF and answers from Rachel

[WentaoLuo]

There are donut-shaped PSF from control-ground-constant image-002.fits and image-155.fits, which are not common. It is caused by the stochastic aberrations added to the basic optical model according to Rachel's email. So just proceed with those "Donuts".

[barnabytprowe]

Haha, we spotted this in validation, and yes the stars are outliers but they are not statistically unexpected. See what you can do guys! @WentaoLuo also posted a nice image here: #6