CrosstalkExtractTask¶

CrosstalkExtractTask measures the flux ratios between bright sources on one amplifier and the same location on the other amplifiers to look for crosstalk sources.

Processing summary¶

CrosstalkExtractTask runs these operations:

Identifies bright sources on each amplifier.
Iterates over the other amplifiers, extracting those potential targets to ensure they have the readout corner placed at the same amplifier coordinate.
Measures the ratio between the background subtracted target location and the source amplifier location.

Python API summary¶

from lsst.cp.pipe.measureCrosstalk import CrosstalkExtractTask

classCrosstalkExtractTask(**kwargs): Task to measure pixel ratios to find crosstalk...

attributeconfig: Access configuration fields and retargetable subtasks.

methodrun(inputExp, sourceExps=[]): Measure pixel ratios between amplifiers in inputExp...

Retargetable subtasks¶

background¶

Default: lsst.meas.algorithms.subtractBackground.SubtractBackgroundTask
Field type: ConfigurableField

Background estimation task.

Configuration fields¶

badMask¶

Default: ['BAD', 'INTRP']
Field type: str ListField

Mask planes to ignore when identifying source pixels.

connections¶

Data type: lsst.pipe.base.config.CrosstalkExtractConfigConnections
Field type: ConfigField

Configurations describing the connections of the PipelineTask to datatypes

doMeasureInterchip¶

Default: False
Field type: bool Field

Measure inter-chip crosstalk as well?

ignoreSaturatedPixels¶

Default: False
Field type: bool Field

Should saturated pixels be ignored?

isTrimmed¶

Default: True
Field type: bool Field

Is the input exposure trimmed?

saveLogOutput¶

Default: True
Field type: bool Field

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

threshold¶

Default: 30000
Field type: float Field

Minimum level of source pixels for which to measure crosstalk.

Debugging¶

extract: Display the exposure under consideration, with the pixels used for crosstalk measurement indicated by the DETECTED mask plane (bool)?
pixels: Display a plot of the ratio calculated for each pixel used in this exposure, split by amplifier pairs. The median value is listed for reference (bool)?

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