lsst.meas.algorithms g4427e4ee63+8d0bacfcb3
|
Classes | |
class | _FilterCatalog |
class | LoadReferenceObjectsConfig |
class | ReferenceObjectLoader |
Functions | |
getFormatVersionFromRefCat (refCat) | |
getRefFluxField (schema, filterName) | |
getRefFluxKeys (schema, filterName) | |
applyProperMotionsImpl (log, catalog, epoch) | |
lsst.meas.algorithms.loadReferenceObjects.applyProperMotionsImpl | ( | log, | |
catalog, | |||
epoch ) |
Apply proper motion correction to a reference catalog. Adjust position and position error in the ``catalog`` for proper motion to the specified ``epoch``, modifying the catalog in place. Parameters ---------- log : `lsst.log.Log` or `logging.getLogger` Log object to write to. catalog : `lsst.afw.table.SimpleCatalog` Catalog of positions, containing: - Coordinates, retrieved by the table's coordinate key. - ``coord_raErr`` : Error in Right Ascension (rad). - ``coord_decErr`` : Error in Declination (rad). - ``pm_ra`` : Proper motion in Right Ascension (rad/yr, East positive) - ``pm_raErr`` : Error in ``pm_ra`` (rad/yr), optional. - ``pm_dec`` : Proper motion in Declination (rad/yr, North positive) - ``pm_decErr`` : Error in ``pm_dec`` (rad/yr), optional. - ``epoch`` : Mean epoch of object (an astropy.time.Time) epoch : `astropy.time.Time` Epoch to which to correct proper motion.
Definition at line 833 of file loadReferenceObjects.py.
lsst.meas.algorithms.loadReferenceObjects.getFormatVersionFromRefCat | ( | refCat | ) |
"Return the format version stored in a reference catalog header. Parameters ---------- refCat : `lsst.afw.table.SimpleCatalog` Reference catalog to inspect. Returns ------- version : `int` Format version integer. Raises ------ ValueError Raised if the catalog is version 0, has no metadata, or does not include a "REFCAT_FORMAT_VERSION" key.
Definition at line 41 of file loadReferenceObjects.py.
lsst.meas.algorithms.loadReferenceObjects.getRefFluxField | ( | schema, | |
filterName ) |
Get the name of a flux field from a schema. Parameters ---------- schema : `lsst.afw.table.Schema` Reference catalog schema. filterName : `str` Name of camera filter. Returns ------- fluxFieldName : `str` Name of flux field. Notes ----- Return the alias of ``anyFilterMapsToThis``, if present else, return ``*filterName*_camFlux`` if present, else, return ``*filterName*_flux`` if present (camera filter name matches reference filter name), else raise an exception. Raises ------ RuntimeError Raised if an appropriate field is not found.
Definition at line 758 of file loadReferenceObjects.py.
lsst.meas.algorithms.loadReferenceObjects.getRefFluxKeys | ( | schema, | |
filterName ) |
Return keys for flux and flux error. Parameters ---------- schema : `lsst.afw.table.Schema` Reference catalog schema. filterName : `str` Name of camera filter. Returns ------- keys : `tuple` of (`lsst.afw.table.Key`, `lsst.afw.table.Key`) Two keys: - flux key - flux error key, if present, else None Raises ------ RuntimeError If flux field not found.
Definition at line 800 of file loadReferenceObjects.py.