SnapCombineTask¶

Python API summary¶

from lsst.pipe.tasks.snapCombine import SnapCombineTask

classSnapCombineTask(*args, **kwargs): Combine two snaps into a single visit image...

attributeconfig: Access configuration fields and retargetable subtasks.

methodrun(snap0, snap1, defects=None): Combine two snaps...

Retargetable subtasks¶

detection¶

Default: lsst.meas.algorithms.detection.SourceDetectionTask
Field type: ConfigurableField

diffim¶

Default: lsst.ip.diffim.snapPsfMatch.SnapPsfMatchTask
Field type: ConfigurableField

measurement¶

Default: lsst.meas.base.sfm.SingleFrameMeasurementTask
Field type: ConfigurableField

repair¶

Default: lsst.pipe.tasks.repair.RepairTask
Field type: ConfigurableField

Configuration fields¶

averageKeys¶

Default: None
Field type: str ListField (optional)

List of float metadata keys to average when combining snaps, e.g. float positions and dates; non-float data must be handled by overriding the fixMetadata method

badMaskPlanes¶

Default: ('DETECTED',)
Field type: str ListField

Mask planes that, if set, the associated pixels are not included in the combined exposure; DETECTED excludes cosmic rays

doDiffIm¶

Default: False
Field type: bool Field

Perform difference imaging before combining

doMeasurement¶

Default: True
Field type: bool Field

Measure difference sources (ignored if doDiffIm false)

doPsfMatch¶

Default: True
Field type: bool Field

Perform PSF matching for difference imaging (ignored if doDiffIm false)

doRepair¶

Default: True
Field type: bool Field

Repair images (CR reject and interpolate) before combining

initialPsf¶

Data type: lsst.pipe.tasks.snapCombine.InitialPsfConfig
Field type: ConfigField

repairPsfFwhm¶

Default: 2.5
Field type: float Field

Psf FWHM (pixels) used to detect CRs

sumKeys¶

Default: None
Field type: str ListField (optional)

List of float or int metadata keys to sum when combining snaps, e.g. exposure time; non-float, non-int data must be handled by overriding the fixMetadata method

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