lsst.meas.astrom.astrometry.AstrometryConfig Class Reference

Inheritance diagram for lsst.meas.astrom.astrometry.AstrometryConfig:

Public Member Functions
	setDefaults (self)

Public Attributes
	sourceFluxType

Static Public Attributes
	wcsFitter
	forceKnownWcs
	maxIter
	minMatchDistanceArcSec
	maxMeanDistanceArcsec
	doMagnitudeOutlierRejection
	magnitudeOutlierRejectionNSigma

Detailed Description

Config for AstrometryTask.

Definition at line 36 of file astrometry.py.

Member Function Documentation

setDefaults()

lsst.meas.astrom.astrometry.AstrometryConfig.setDefaults

(

self

)

Reimplemented from lsst.meas.astrom.ref_match.RefMatchConfig.

Definition at line 87 of file astrometry.py.

    def setDefaults(self):
        # Override the default source selector for astrometry tasks
        self.sourceFluxType = "Psf"
        # Configured to match the deprecated "matcher" selector: isolated,
        # SN > 40, some bad flags, valid centroids.
        self.sourceSelector["science"].doSignalToNoise = True
        self.sourceSelector["science"].signalToNoise.minimum = 40
        self.sourceSelector["science"].signalToNoise.fluxField = f"slot_{self.sourceFluxType}Flux_instFlux"
        self.sourceSelector["science"].signalToNoise.errField = f"slot_{self.sourceFluxType}Flux_instFluxErr"
        self.sourceSelector["science"].doFlags = True
        self.sourceSelector["science"].flags.bad = ["base_PixelFlags_flag_edge",
                                                    "base_PixelFlags_flag_interpolatedCenter",
                                                    "base_PixelFlags_flag_saturated",
                                                    "base_SdssCentroid_flag",
                                                    ]
        self.sourceSelector["science"].doRequirePrimary = True
        self.sourceSelector["science"].doIsolated = True
 
 

Member Data Documentation

doMagnitudeOutlierRejection

lsst.meas.astrom.astrometry.AstrometryConfig.doMagnitudeOutlierRejection

static

Initial value:

=  pexConfig.Field(
        dtype=bool,
        doc=("If True then a rough zeropoint will be computed from matched sources "
             "and outliers will be rejected in the iterations."),
        default=True,
    )

Definition at line 73 of file astrometry.py.

forceKnownWcs

lsst.meas.astrom.astrometry.AstrometryConfig.forceKnownWcs

static

Initial value:

=  pexConfig.Field(
        dtype=bool,
        doc="If True then load reference objects and match sources but do not fit a WCS; "
            "this simply controls whether 'run' calls 'solve' or 'loadAndMatch'",
        default=False,
    )

Definition at line 43 of file astrometry.py.

magnitudeOutlierRejectionNSigma

lsst.meas.astrom.astrometry.AstrometryConfig.magnitudeOutlierRejectionNSigma

static

Initial value:

=  pexConfig.Field(
        dtype=float,
        doc=("Number of sigma (measured from the distribution) in magnitude "
             "for a potential reference/source match to be rejected during "
             "iteration."),
        default=3.0,
    )

Definition at line 79 of file astrometry.py.

maxIter

lsst.meas.astrom.astrometry.AstrometryConfig.maxIter

static

Initial value:

=  pexConfig.RangeField(
        doc="maximum number of iterations of match sources and fit WCS"
            "ignored if not fitting a WCS",
        dtype=int,
        default=3,
        min=1,
    )

Definition at line 49 of file astrometry.py.

maxMeanDistanceArcsec

lsst.meas.astrom.astrometry.AstrometryConfig.maxMeanDistanceArcsec

static

Initial value:

=  pexConfig.RangeField(
        doc="Maximum mean on-sky distance (in arcsec) between matched source and rerference "
            "objects post-fit.  A mean distance greater than this threshold raises a TaskError "
            "and the WCS fit is considered a failure.  The default is set to the maximum tolerated "
            "by the external global calibration (e.g. jointcal) step for conceivable recovery.  "
            "Appropriate value will be dataset and workflow dependent.",
        dtype=float,
        default=0.5,
        min=0,
    )

Definition at line 63 of file astrometry.py.

minMatchDistanceArcSec

lsst.meas.astrom.astrometry.AstrometryConfig.minMatchDistanceArcSec

static

Initial value:

=  pexConfig.RangeField(
        doc="the match distance below which further iteration is pointless (arcsec); "
            "ignored if not fitting a WCS",
        dtype=float,
        default=0.001,
        min=0,
    )

Definition at line 56 of file astrometry.py.

sourceFluxType

lsst.meas.astrom.astrometry.AstrometryConfig.sourceFluxType

Definition at line 89 of file astrometry.py.

wcsFitter

lsst.meas.astrom.astrometry.AstrometryConfig.wcsFitter

static

Initial value:

=  pexConfig.ConfigurableField(
        target=FitTanSipWcsTask,
        doc="WCS fitter",
    )

Definition at line 39 of file astrometry.py.

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The documentation for this class was generated from the following file:

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/meas_astrom/gf1cff7945b+f5613e8b4f/python/lsst/meas/astrom/astrometry.py