RefMatchTask

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

Bases: Task

Match an input source catalog with objects from a reference catalog.

Parameters

refObjLoaderlsst.meas.algorithms.ReferenceLoader

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

**kwargs

Additional keyword arguments for pipe_base lsst.pipe.base.Task.

Methods Summary

loadAndMatch(exposure, sourceCat)	Load reference objects overlapping an exposure and match to sources detected on that exposure.
setRefObjLoader(refObjLoader)	Sets the reference object loader for the task.

Methods Documentation

loadAndMatch(exposure, sourceCat)

Load reference objects overlapping an exposure and match to sources detected on that exposure.

Parameters

exposurelsst.afw.image.Exposure

exposure that the sources overlap

sourceCatlsst.afw.table.SourceCatalog.

catalog of sources detected on the exposure

Returns

resultlsst.pipe.base.Struct

Result struct with Components:

• refCat : reference object catalog of objects that overlap the exposure (lsst.afw.table.SimpleCatalog)

• matches : Matched sources and references (list of lsst.afw.table.ReferenceMatch)

• matchMeta : metadata needed to unpersist matches (lsst.daf.base.PropertyList)

Notes

ignores config.matchDistanceSigma

setRefObjLoader(refObjLoader)

Sets the reference object loader for the task.

Parameters

refObjLoader

An instance of a reference object loader task or class.