FgcmBuildStarsBaseTask

class lsst.fgcmcal.FgcmBuildStarsBaseTask(initInputs=None, **kwargs)

Bases: PipelineTask, ABC

Base task to build stars for FGCM global calibration

Methods Summary

fgcmMakeAllStarObservations(groupedHandles, ...)	Compile all good star observations from visits in visitCat.
fgcmMakeVisitCatalog(camera, groupedHandles)	Make a visit catalog with all the keys from each visit
fgcmMatchStars(visitCat, obsCat[, lutHandle])	Use FGCM code to match observations into unique stars.

Methods Documentation

fgcmMakeAllStarObservations(groupedHandles, visitCat, sourceSchema, camera, calibFluxApertureRadius=None)

Compile all good star observations from visits in visitCat.

Parameters

groupedHandlesdict [list [lsst.daf.butler.DeferredDatasetHandle]]

Dataset handles, grouped by visit.

visitCatafw.table.BaseCatalog

Catalog with visit data for FGCM

sourceSchemalsst.afw.table.Schema

Schema for the input src catalogs.

camera : lsst.afw.cameraGeom.Camera calibFluxApertureRadius : float, optional

Aperture radius for calibration flux.

inStarObsCatafw.table.BaseCatalog

Input observation catalog. If this is incomplete, observations will be appended from when it was cut off.

Returns

fgcmStarObservationsafw.table.BaseCatalog

Full catalog of good observations.

Raises

RuntimeError: Raised if doSubtractLocalBackground is True and

calibFluxApertureRadius is not set.

fgcmMakeVisitCatalog(camera, groupedHandles, useScienceDetectors=False)

Make a visit catalog with all the keys from each visit

Parameters

cameralsst.afw.cameraGeom.Camera

Camera from the butler

groupedHandlesdict [list [lsst.daf.butler.DeferredDatasetHandle]]

Dataset handles, grouped by visit.

useScienceDetectorsbool, optional

Limit to science detectors?

Returns

visitCat: afw.table.BaseCatalog

fgcmMatchStars(visitCat, obsCat, lutHandle=None)

Use FGCM code to match observations into unique stars.

Parameters

visitCat: afw.table.BaseCatalog

Catalog with visit data for fgcm

obsCat: afw.table.BaseCatalog

Full catalog of star observations for fgcm

lutHandle: lsst.daf.butler.DeferredDatasetHandle, optional

Data reference to fgcm look-up table (used if matching reference stars).

Returns

fgcmStarIdCat: afw.table.BaseCatalog

Catalog of unique star identifiers and index keys

fgcmStarIndicesCat: afwTable.BaseCatalog

Catalog of unique star indices

fgcmRefCat: afw.table.BaseCatalog

Catalog of matched reference stars. Will be None if config.doReferenceMatches is False.