fwhm_geom2_fwhm_eff

rubin_sim.phot_utils.fwhm_geom2_fwhm_eff(fwhm_geom)

Convert fwhm_geom to fwhm_eff. This conversion was calculated by Bo Xin and Zeljko Ivezic (and will be in an update on the LSE-40 and overview papers).

Parameters:
fwhm_geom: `float`

The geometric FWHM value, as measured from a typical PSF profile, in arcseconds.

Returns:
fwhm_eff: float

FWHM effective, the single-gaussian equivalent FWHM value, appropriate for calc_neff, in arcseconds.