FgcmOutputProductsTask¶

FgcmOutputProductsTask uses the output from FgcmFitCycleTask to generate a full suite of output products (photometric calibration files and atmosphere transmissions) for use in downstream processing.

This is the fourth and final task in a typical fgcmcal processing chain. The first is FgcmMakeLutTask, the second is FgcmBuildStarsTableTask or lsst.fgcmcal.fgcmBuildStars.FgcmBuildStarsTask, and the third is FgcmFitCycleTask.

Processing summary¶

FgcmOutputProductsTask reads in outputs from FgcmFitCycleTask, with the cycleNumber specified in the config file, translates these tables to formats used by coaddition and other downstream processing.

Python API summary¶

from lsst.fgcmcal.fgcmOutputProducts import FgcmOutputProductsTask

classFgcmOutputProductsTask(**kwargs): Output products from FGCM global calibration...

attributeconfig: Access configuration fields and retargetable subtasks.

methodrun(handleDict, physicalFilterMap): Run the output products task...

Retargetable subtasks¶

photoCal¶

Default: lsst.pipe.tasks.photoCal.PhotoCalTask
Field type: ConfigurableField

task to perform ‘absolute’ calibration

Configuration fields¶

connections¶

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

Configurations describing the connections of the PipelineTask to datatypes

doApplyMeanChromaticCorrection¶

Default: True
Field type: bool Field

Apply the mean chromatic correction to the zeropoints?

doAtmosphereOutput¶

Default: True
Field type: bool Field

Output atmospheres in transmission_atmosphere_fgcm format

doComposeWcsJacobian¶

Default: True
Field type: bool Field

Compose Jacobian of WCS with fgcm calibration for output photoCalib?

doReferenceCalibration¶

Default: False
Field type: bool Field

Transfer ‘absolute’ calibration from reference catalog? This afterburner step is unnecessary if reference stars were used in the full fit in FgcmFitCycleTask.

doZeropointOutput¶

Default: True
Field type: bool Field

Output zeropoints in fgcm_photoCalib format

physicalFilterMap¶

Default: {}
Field type: DictField
Key type: str
Value type: str

Mapping from ‘physicalFilter’ to band.

referenceMinMatch¶

Default: 50
Field type: int Field

Minimum number of stars matched to reference catalog to be used in statistics

referencePixelizationMinStars¶

Default: 200
Field type: int Field

Minimum number of stars per healpix pixel to select for comparisonto the specified reference catalog

referencePixelizationNPixels¶

Default: 100
Field type: int Field

Number of healpix pixels to sample to do comparison. Doing too many will take a long time and not yield any more precise results because the final number is the median offset (per band) from the set of pixels.

referencePixelizationNside¶

Default: 64
Field type: int Field

Healpix nside to pixelize catalog to compare to reference catalog

saveLogOutput¶

Default: True
Field type: bool Field

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

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