lsst.meas.astrom.astrometry.AstrometryConfig Class Reference
Inheritance diagram for lsst.meas.astrom.astrometry.AstrometryConfig:
Public Member Functions | |
| setDefaults (self) | |
| validate (self) | |
Detailed Description
Config for AstrometryTask.
Definition at line 38 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 141 of file astrometry.py.
◆ validate()
| lsst.meas.astrom.astrometry.AstrometryConfig.validate | ( | self | ) |
Definition at line 149 of file astrometry.py.
Member Data Documentation
◆ cullMagBuffer
|
static |
Initial value:
= pexConfig.Field(
dtype=float,
doc="Generous buffer on the fiducial zero point culling to account for observing "
"condition variations and uncertainty of the fiducial values.",
default=0.3,
optional=True,
)
Definition at line 103 of file astrometry.py.
◆ doFiducialZeroPointCull
|
static |
Initial value:
= pexConfig.Field(
dtype=bool,
doc="If True, use the obs_package-defined fiducial zeropoint values to compute the "
"expected zeropoint for the current exposure. This is for use in culling reference "
"objects down to the approximate magnitude range of the detection source catalog "
"used for astrometric calibration.",
default=False,
)
Definition at line 95 of file astrometry.py.
◆ doFitSipApproximation
|
static |
Initial value:
= pexConfig.Field(
"Whether to fit a TAN-SIP approximation to the true WCS for use in FITS headers.",
dtype=bool,
default=True,
)
Definition at line 131 of file astrometry.py.
◆ 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 75 of file astrometry.py.
◆ fiducialZeroPoint
|
static |
Initial value:
= pexConfig.DictField(
keytype=str,
itemtype=float,
doc="Fiducial zeropoint values, keyed by band.",
default=None,
optional=True,
)
Definition at line 88 of file astrometry.py.
◆ filterMap
|
static |
Initial value:
= pexConfig.DictField(
doc="Mapping from physical filter label to reference filter name.",
keytype=str,
itemtype=str,
default={},
)
Definition at line 117 of file astrometry.py.
◆ fitSipApproximation
|
static |
Initial value:
= pexConfig.ConfigurableField(
"Configuration for fitting a TAN-SIP approximation to the true WCS for use in FITS headers.",
target=FitSipApproximationTask,
)
Definition at line 136 of file astrometry.py.
◆ 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 45 of file astrometry.py.
◆ 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 81 of file astrometry.py.
◆ matchDistanceSigma
|
staticinherited |
Initial value:
= pexConfig.RangeField(
doc="the maximum match distance is set to "
" mean_match_distance + matchDistanceSigma*std_dev_match_distance; "
"ignored if not fitting a WCS",
dtype=float,
default=2,
min=0,
)
Definition at line 41 of file ref_match.py.
◆ matcher
|
staticinherited |
Initial value:
= pexConfig.ConfigurableField(
target=MatchPessimisticBTask,
doc="reference object/source matcher",
)
Definition at line 37 of file ref_match.py.
◆ 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 51 of file astrometry.py.
◆ maxMeanDistanceArcsec
|
static |
Initial value:
= pexConfig.RangeField(
doc="Maximum mean on-sky distance (in arcsec) between matched source and reference "
"objects post-fit. A mean distance greater than this threshold raises BadAstrometryFit "
"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; "
"the appropriate value will be dataset and workflow dependent.",
dtype=float,
default=0.5,
min=0,
)
Definition at line 65 of file astrometry.py.
◆ maxRefToSourceRatio
|
static |
Initial value:
= pexConfig.Field(
dtype=float,
doc="Maximum ratio of loaded reference objects to detected sources in play. If exceded "
"the source catalog will be trimmed to the minimum (i.e. brightest) mag of the "
"reference catalog.",
default=20.0,
)
Definition at line 110 of file astrometry.py.
◆ 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 58 of file astrometry.py.
◆ refColorDeltaDefaults
|
static |
Initial value:
= pexConfig.DictField(
doc="Fallback values for color differences between the reference band and the "
"physical filter of the observation (note that these values apply to LSSTCam "
"filters and may not be appropriate for others).",
keytype=str,
itemtype=float,
default={"u": -1.5, "g": -0.6, "r": 0.0, "i": 0.5, "z": 0.6, "y": 0.8},
)
Definition at line 123 of file astrometry.py.
◆ referenceSelector
|
staticinherited |
Initial value:
= pexConfig.ConfigurableField(
target=ReferenceSourceSelectorTask,
doc="How to select reference objects for cross-matching."
)
Definition at line 53 of file ref_match.py.
◆ sourceFluxType
|
staticinherited |
Initial value:
= pexConfig.Field(
dtype=str,
doc="Source flux type to use in source selection.",
default='Psf'
)
Definition at line 57 of file ref_match.py.
◆ sourceSelector
|
staticinherited |
Initial value:
= sourceSelectorRegistry.makeField(
doc="How to select sources for cross-matching.",
default="science",
)
Definition at line 49 of file ref_match.py.
◆ wcsFitter
|
static |
Initial value:
= pexConfig.ConfigurableField(
target=FitTanSipWcsTask,
doc="WCS fitter",
)
Definition at line 41 of file astrometry.py.
The documentation for this class was generated from the following file:
- python/lsst/meas/astrom/astrometry.py
Generated on Fri Apr 24 2026 08:29:20 for lsst.meas.astrom by
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