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