HsmFwhm

class lsst.pipe.tasks.functors.HsmFwhm(filt=None, dataset=None, noDup=None)

Bases: Functor

Functor to calculate the PSF FWHM with second moments measured from the HsmShapeAlgorithm plugin.

This is in units of arcseconds, and assumes the hsc_rings_v1 skymap pixel scale of 0.168 arcseconds/pixel.

Notes

This conversion assumes the PSF is Gaussian, which is not always the case.

Attributes Summary

SIGMA2FWHM
name
pixelScale

Attributes Documentation

SIGMA2FWHM = 2.3548200450309493

name = 'HSM Psf FWHM'

pixelScale = 0.168