RefMatchTask

RefMatchTask matches a source catalog with objects from a reference catalog.

Processing summary

RefMatchTask runs this sequence of operations:

• Find position reference stars that overlap the exposure.
• Match input source catalog to the position reference stars.
• Return statistics on quality of match.

Python API summary

from lsst.meas.astrom.ref_match import RefMatchTask

classRefMatchTask(refObjLoader, **kwargs)

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

attributeconfig

Access configuration fields and retargetable subtasks.

See also

See the RefMatchTask API reference for complete details.

Retargetable subtasks

matcher

Default

lsst.meas.astrom.matchPessimisticB.MatchPessimisticBTask

Field type

ConfigurableField

reference object/source matcher

referenceSelection

Default

lsst.meas.algorithms.sourceSelector.ReferenceSourceSelectorTask

Field type

ConfigurableField

Selection of reference sources

sourceSelection

Default

lsst.meas.algorithms.sourceSelector.ScienceSourceSelectorTask

Field type

ConfigurableField

Selection of science sources

Configuration fields

matchDistanceSigma

Default

2

Field type

float RangeField

Range

[0,inf)

the maximum match distance is set to mean_match_distance + matchDistanceSigma*std_dev_match_distance; ignored if not fitting a WCS