DirectMatchTask

class lsst.meas.astrom.DirectMatchTask(refObjLoader=None, **kwargs)

Bases: Task

Simple, brute force matching of a source catalog to a reference catalog.

Parameters

butlerNone

Compatibility parameter. Should not be used.

refObjLoaderlsst.meas.algorithms.ReferenceObjectLoader or None

A reference object loader object; gen3 pipeline tasks will pass None and call setRefObjLoader in runQuantum.

**kwargs

Other keyword arguments required for instantiating a Task (such as config).

Methods Summary

calculateCircle(catalog)	Calculate a circle enclosing the catalog.
run(catalog[, filterName, epoch])	Load reference objects and match to them.
setRefObjLoader(refObjLoader)	Set the reference object loader for the task.

Methods Documentation

calculateCircle(catalog)

Calculate a circle enclosing the catalog.

Parameters

cataloglsst.afw.table.SourceCatalog

Catalog to encircle.

Returns

resultlsst.pipe.base.Struct

Result struct with components:

center

ICRS center coordinate (lsst.afw.geom.SpherePoint).

radius

Radius of the circle (lsst.geom.Angle).

run(catalog, filterName=None, epoch=None)

Load reference objects and match to them.

Parameters

cataloglsst.afw.table.SourceCatalog

Catalog to match.

filterNamestr

Name of filter loading fluxes.

epochastropy.time.Time or None

Epoch to which to correct proper motion and parallax, or None to not apply such corrections.

Returns

resultlsst.pipe.base.Struct

Result struct with components:

matches

Matched sources with associated reference (lsst.afw.table.SourceMatchVector).

matchMeta

Match metadata (lsst.meas.astrom.MatchMetadata).

setRefObjLoader(refObjLoader)

Set the reference object loader for the task.

Parameters

refObjLoaderlsst.meas.algorithms.ReferenceObjectLoader

An instance of a reference object loader.