understand what the psf coadd is doing - Githubissues

LSSTDESC / descwl_coadd

Tools for coadding using the LSST DM software stack

GNU General Public License v3.0

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understand what the psf coadd is doing #11

Closed esheldon closed 3 years ago

esheldon commented 4 years ago

how does the psf coadd work?

how does it deal with pixelization?
is the psf also shifted as it is for the underlying image that's being coadded?
we are currently using this fixed kernel, how does that work for coadding?

what's the right thing to do?

we want the psf coadd to reflect what happens to the images
my intuition is that we want to coadd psf images that are dithered just like the images
but again, how it all works depends how the pixel is treated I think