FirstLastDiaSourceTime

class lsst.meas.base.FirstLastDiaSourceTime(config, name, metadata)

Bases: DiaObjectCalculationPlugin

Determine the min and max time DiaSources have been observed.

Attributes Summary

needsFilter	This plugin requires a filter to be specified.
outputCols	DiaObject column names output by the plugin.
plugType	Does the plugin operate on a single source or the whole catalog (str)? If the plugin operates on a single source at a time, this should be set to "single"; if it expects the whoe catalog, to "multi".

Methods Summary

calculate(diaObjects, diaSources, **kwargs)	Store the first and last DiaSource times per DiaObject.
getExecutionOrder()	Used to set the relative order of plugin execution.

Attributes Documentation

needsFilter = False

This plugin requires a filter to be specified. Plugin’s using filter names usually deal with fluxes and only a sub-set of the DiaSource catalog. Plugins that to not use the filter name usually run over a value common across all observations/detections such as position.

outputCols = ['firstDiaSourceMjdTai', 'lastDiaSourceMjdTai']

DiaObject column names output by the plugin. DiaCalculationTask should raise an error if another pluging is run output to the same column. Output columns should be defined in the DPDD/cat/Apdb schema. Filter dependent columns should be specified without the filter name perpended to them. eg psfFluxMean instead of u_psfFluxMean.

plugType = 'multi'

Does the plugin operate on a single source or the whole catalog (str)? If the plugin operates on a single source at a time, this should be set to "single"; if it expects the whoe catalog, to "multi". If the plugin is of type "multi", the fail method must be implemented to accept the whole catalog. If the plugin is of type "single", fail should accept a single source record.

Methods Documentation

calculate(diaObjects, diaSources, **kwargs)

Store the first and last DiaSource times per DiaObject.

Stores the smaller of the stored value of firstDiaSourceMjdTai and the minimum midpointMjdTai in the provided DiaSources, and the larger of the stored value of lastDiaSourceMjdTai and the maximum midpointMjdTai in the provided DiaSources. This allows the stored values to persist even when only a shorter history of DiaSources is loaded from the APDB. DiaSources with NaN midpointMjdTai are ignored.

Parameters

diaObjectspandas.DataFrame

Summary objects to store values in, which may include prior values of firstDiaSourceMjdTai and lastDiaSourceMjdTai for some objects.

diaSourcespandas.DataFrame or pandas.DataFrameGroupBy

Catalog of DiaSources summarized by these DiaObjects.

**kwargs

Any additional keyword arguments that may be passed to the plugin.

classmethod getExecutionOrder()

Used to set the relative order of plugin execution.

The values returned by getExecutionOrder are compared across all plugins, and smaller numbers run first.

Notes

CatalogCalculationPlugins must run with BasePlugin.DEFAULT_CATALOGCALCULATION or higher.

All plugins must implement this method with an appropriate run level