CfhtIsrTask

class lsst.obs.cfht.cfhtIsrTask.CfhtIsrTask(*args, **kwargs)

Bases: lsst.ip.isr.isrTask.IsrTask

Methods Summary

run(ccdExposure[, bias, linearizer, dark, …])

Perform instrument signature removal on an exposure

Methods Documentation

run(ccdExposure, bias=None, linearizer=None, dark=None, flat=None, defects=None, fringes=None, bfKernel=None, camera=None, **kwds)

Perform instrument signature removal on an exposure

Steps include: - Detect saturation, apply overscan correction, bias, dark and flat - Perform CCD assembly - Interpolate over defects, saturated pixels and all NaNs - Persist the ISR-corrected exposure as “postISRCCD” if

config.doWrite is True

Parameters:

ccdExposure : lsst.afw.image.Exposure

Detector data.

bias : lsst.afw.image.exposure

Exposure of bias frame.

linearizer : lsst.ip.isr.LinearizeBase callable

Linearizing functor; a subclass of lsst.ip.isr.LinearizeBase.

dark : lsst.afw.image.exposure

Exposure of dark frame.

flat : lsst.afw.image.exposure

Exposure of flatfield.

defects : list

list of detects

fringes : lsst.afw.image.exposure or list of lsst.afw.image.exposure

exposure of fringe frame or list of fringe exposure

bfKernel : None

kernel used for brighter-fatter correction; currently unsupported

camera : lsst.afw.cameraGeom.Camera

Camera geometry, used by addDistortionModel.

**kwds : dict

additional kwargs forwarded to IsrTask.run.

Returns:

struct : lsst.pipe.base.Struct with fields:

• exposure: the exposure after application of ISR