FgcmMakeLutTask

class lsst.fgcmcal.FgcmMakeLutTask(initInputs=None, **kwargs)

Bases: PipelineTask

Make Look-Up Table for FGCM.

This task computes a look-up-table for the range in expected atmosphere variation and variation in instrumental throughput (as tracked by the transmission_filter products). By pre-computing linearized integrals, the FGCM fit is orders of magnitude faster for stars with a broad range of colors and observing bands, yielding precision at the 1-2 mmag level.

Computing a LUT requires running MODTRAN or with a pre-generated atmosphere table packaged with fgcm.

Methods Summary

runQuantum(butlerQC, inputRefs, outputRefs)

Do butler IO and transform to provide in memory objects for tasks run method.

Methods Documentation

runQuantum(butlerQC, inputRefs, outputRefs)

Do butler IO and transform to provide in memory objects for tasks run method.

Parameters

butlerQCQuantumContext

A butler which is specialized to operate in the context of a lsst.daf.butler.Quantum.

inputRefsInputQuantizedConnection

Datastructure whose attribute names are the names that identify connections defined in corresponding PipelineTaskConnections class. The values of these attributes are the lsst.daf.butler.DatasetRef objects associated with the defined input/prerequisite connections.

outputRefsOutputQuantizedConnection

Datastructure whose attribute names are the names that identify connections defined in corresponding PipelineTaskConnections class. The values of these attributes are the lsst.daf.butler.DatasetRef objects associated with the defined output connections.