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LSSTDESC / descwl-shear-sims

simple simulations for testing weak lensing shear measurement
BSD 3-Clause "New" or "Revised" License
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Add bulge+disk (bd) and bulge+disk+knots (bdk) #160

Closed esheldon closed 2 years ago

esheldon commented 2 years ago

I've added these models to FixedGalaxyCatalog and FixedPairGalaxyCatalog to provide some non-elliptical and non-sersic shapes for testing the deblending.

The bulge and disk are offset randomly, and the bulge is rotated randomly relative to the disk.

The knots are limited in number and fraction of the disk light, and are more compact, drawing from a smaller hlr and a gaussian rather than exponential profile. This helps avoid knots getting detected separately, although we can loosen that if we want.

esheldon commented 2 years ago

Will be adding some tests

esheldon commented 2 years ago

Hmmm.... the bd and bdk are not really "fixed galaxies" any more. Maybe should consider a new class for objects that vary.

esheldon commented 2 years ago

Now have GalaxyCatalog and PairGalaxyCatalog with variations

esheldon commented 2 years ago

No hurry on this one @beckermr

esheldon commented 2 years ago

Thanks for the pointer, I'll keep it in mind going forward