AssembleCoaddTask

Assemble a coadded image from a set of CoaddTempExps.

Python API summary

from lsst.drp.tasks.assemble_coadd import AssembleCoaddTask
classAssembleCoaddTask(*args, **kwargs)

Assemble a coadded image from a set of warps...

attributeconfig

Access configuration fields and retargetable subtasks.

methodrun(skyInfo, tempExpRefList, imageScalerList, weightList, altMaskList=None, mask=None, supplementaryData=None)

Assemble a coadd from input warps...

See also

See the AssembleCoaddTask API reference for complete details.

Retargetable subtasks

inputMapper

Default

lsst.pipe.tasks.healSparseMapping.HealSparseInputMapTask

Field type

ConfigurableField

Input map creation subtask.

inputRecorder

Default

lsst.pipe.tasks.coaddInputRecorder.CoaddInputRecorderTask

Field type

ConfigurableField

Subtask that helps fill CoaddInputs catalogs added to the final Exposure

interpImage

Default

lsst.pipe.tasks.interpImage.InterpImageTask

Field type

ConfigurableField

Task to interpolate (and extrapolate) over NaN pixels

modelPsf

Default

lsst.meas.algorithms.gaussianPsfFactory.applyWrapper

Field type

ConfigurableField

Model Psf factory

scaleZeroPoint

Default

lsst.pipe.tasks.scaleZeroPoint.ScaleZeroPointTask

Field type

ConfigurableField

Task to adjust the photometric zero point of the coadd temp exposures

select

Default

lsst.pipe.tasks.selectImages.PsfWcsSelectImagesTask

Field type

ConfigurableField

Image selection subtask.

Configuration fields

badMaskPlanes

Default
('NO_DATA',)
Field type

str ListField

Mask planes that, if set, the associated pixel should not be included in the coaddTempExp.

brightObjectMaskName

Default
'BRIGHT_OBJECT'
Field type

str Field

Name of mask bit used for bright objects

calcErrorFromInputVariance

Default
True
Field type

bool Field

Calculate coadd variance from input variance by stacking statistic. Passed to StatisticsControl.setCalcErrorFromInputVariance()

clipIter

Default
2
Field type

int Field

Number of iterations of outlier rejection; ignored if non-clipping statistic selected.

coaddName

Default
'deep'
Field type

str Field

Coadd name: typically one of deep or goodSeeing.

coaddPsf

Data type

lsst.meas.algorithms.CoaddPsfConfig

Field type

ConfigField

Configuration for CoaddPsf

connections

Data type

lsst.pipe.base.config.AssembleCoaddConfigConnections

Field type

ConfigField

Configurations describing the connections of the PipelineTask to datatypes

doApplyExternalPhotoCalib

Default
False
Field type

bool Field

Whether to apply external photometric calibration via an lsst.afw.image.PhotoCalib object. Uses the externalPhotoCalibName field to determine which calibration to load. Deprecated: Deprecated in favor of the ‘visitSummary’ connection. Will be removed after v26.

doApplyExternalSkyWcs

Default
False
Field type

bool Field

Whether to apply external astrometric calibration via an lsst.afw.geom.SkyWcs object. Uses externalSkyWcsName field to determine which calibration to load. Deprecated: Deprecated in favor of the ‘visitSummary’ connection. Will be removed after v26.

doAttachTransmissionCurve

Default
False
Field type

bool Field

Attach a piecewise TransmissionCurve for the coadd? (requires all input Exposures to have TransmissionCurves).

doInputMap

Default
False
Field type

bool Field

Create a bitwise map of coadd inputs

doInterp

Default
True
Field type

bool Field

Interpolate over NaN pixels? Also extrapolate, if necessary, but the results are ugly.

doMaskBrightObjects

Default
False
Field type

bool Field

Set mask and flag bits for bright objects?

doNImage

Default
False
Field type

bool Field

Create image of number of contributing exposures for each pixel

doOnlineForMean

Default
False
Field type

bool Field

Perform online coaddition when statistic=”MEAN” to save memory?

doPsfMatch

Default
False
Field type

bool Field

Match to modelPsf? Sets makePsfMatched=True, makeDirect=False Deprecated: This field is no longer used. Will be removed after v26.

doSelectVisits

Default
False
Field type

bool Field

Coadd only visits selected by a SelectVisitsTask

doSigmaClip

Default
False
Field type

bool Field

Perform sigma clipped outlier rejection with MEANCLIP statistic? Deprecated: True

doUsePsfMatchedPolygons

Default
False
Field type

bool Field

Use ValidPolygons from shrunk Psf-Matched Calexps? Should be set to True by CompareWarp only.

doWrite

Default
True
Field type

bool Field

Persist coadd?

hasFakes

Default
False
Field type

bool Field

Should be set to True if fake sources have been inserted into the input data.

includeCalibVar

Default
False
Field type

bool Field

Add photometric calibration variance to warp variance plane.

maskPropagationThresholds

Default
{'SAT': 0.1}
Field type

DictField

Key type

str

Value type

float

Threshold (in fractional weight) of rejection at which we propagate a mask plane to the coadd; that is, we set the mask bit on the coadd if the fraction the rejected frames would have contributed exceeds this value.

matchingKernelSize

Default
21
Field type

int Field

Size in pixels of matching kernel. Must be odd.

removeMaskPlanes

Default
['NOT_DEBLENDED']
Field type

str ListField

Mask planes to remove before coadding

saveLogOutput

Default
True
Field type

bool Field

Flag to enable/disable saving of log output for a task, enabled by default.

saveMetadata

Default
True
Field type

bool Field

Flag to enable/disable metadata saving for a task, enabled by default. Deprecated: This field is deprecated and will be removed after v26.

sigmaClip

Default
3.0
Field type

float Field

Sigma for outlier rejection; ignored if non-clipping statistic selected.

statistic

Default
'MEANCLIP'
Field type

str Field

Main stacking statistic for aggregating over the epochs.

subregionSize

Default
(2000, 2000)
Field type

int ListField

Required length

2

Width, height of stack subregion size; make small enough that a full stack of images will fit into memory at once.

useGlobalExternalPhotoCalib

Default
False
Field type

bool Field

When using doApplyExternalPhotoCalib, use ‘global’ calibrations that are not run per-tract. When False, use per-tract photometric calibration files. Deprecated: Deprecated in favor of the ‘visitSummary’ connection. Will be removed after v26.

useGlobalExternalSkyWcs

Default
False
Field type

bool Field

When using doApplyExternalSkyWcs, use ‘global’ calibrations that are not run per-tract. When False, use per-tract wcs files. Deprecated: Deprecated in favor of the ‘visitSummary’ connection. Will be removed after v26.

warpType

Default
'direct'
Field type

str Field

Warp name: one of ‘direct’ or ‘psfMatched’