Inheritance diagram for lsst.pipe.tasks.functors.DeconvolvedMoments:

Static Public Attributes
str	name = 'Deconvolved Moments'

str	shortname = 'deconvolvedMoments'

Protected Member Functions
	_func (self, df)

Static Protected Attributes
tuple	_columns

Detailed Description

This functor subtracts the trace of the PSF second moments from the
trace of the second moments of the source.

If the HsmShapeAlgorithm measurement is valid, then these will be used for
the sources.
Otherwise, the SdssShapeAlgorithm measurements will be used.

Definition at line 972 of file functors.py.

Member Function Documentation

◆ _func()

lsst.pipe.tasks.functors.DeconvolvedMoments._func	(		self,
			df )

protected

Calculate deconvolved moments.

Reimplemented from lsst.pipe.tasks.functors.Functor.

Definition at line 988 of file functors.py.

    def _func(self, df):
        """Calculate deconvolved moments."""
        if "ext_shapeHSM_HsmSourceMoments_xx" in df.columns:  # _xx added by tdm
            hsm = df["ext_shapeHSM_HsmSourceMoments_xx"] + df["ext_shapeHSM_HsmSourceMoments_yy"]
        else:
            hsm = np.ones(len(df))*np.nan
        sdss = df["base_SdssShape_xx"] + df["base_SdssShape_yy"]
        if "ext_shapeHSM_HsmPsfMoments_xx" in df.columns:
            psf = df["ext_shapeHSM_HsmPsfMoments_xx"] + df["ext_shapeHSM_HsmPsfMoments_yy"]
        else:
            # LSST does not have shape.sdss.psf.
            # We could instead add base_PsfShape to the catalog using
            # exposure.getPsf().computeShape(s.getCentroid()).getIxx().
            raise RuntimeError('No psf shape parameter found in catalog')
 
        return hsm.where(np.isfinite(hsm), sdss) - psf
 
 

Member Data Documentation

◆ _columns

tuple lsst.pipe.tasks.functors.DeconvolvedMoments._columns

staticprotected

Initial value:

=  ("ext_shapeHSM_HsmSourceMoments_xx",
                "ext_shapeHSM_HsmSourceMoments_yy",
                "base_SdssShape_xx", "base_SdssShape_yy",
                "ext_shapeHSM_HsmPsfMoments_xx",
                "ext_shapeHSM_HsmPsfMoments_yy")

Definition at line 982 of file functors.py.

◆ name

str lsst.pipe.tasks.functors.DeconvolvedMoments.name = 'Deconvolved Moments'

static

Definition at line 980 of file functors.py.

◆ shortname

str lsst.pipe.tasks.functors.DeconvolvedMoments.shortname = 'deconvolvedMoments'

static

Definition at line 981 of file functors.py.

The documentation for this class was generated from the following file:

/j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/pipe_tasks/g29320951ab+012e1474a1/python/lsst/pipe/tasks/functors.py

Static Public Attributes

Protected Member Functions