lsst.pipe.tasks
20.0.0-18-g08fba245+88079d2923
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Colorterm correction for one pair of filters. More...
Public Member Functions | |
def | getCorrectedMagnitudes (self, refCat, filterName) |
def | transformSource (self, source) |
Transform the brightness of a source. More... | |
def | transformMags (self, primary, secondary) |
Transform brightness. More... | |
def | propagateFluxErrors (self, primaryFluxErr, secondaryFluxErr) |
Static Public Attributes | |
primary | |
secondary | |
c0 | |
c1 | |
c2 | |
Colorterm correction for one pair of filters.
The transformed magnitude p' is given by p' = primary + c0 + c1*(primary - secondary) + c2*(primary - secondary)**2
To construct a Colorterm, use keyword arguments: Colorterm(primary=primaryFilterName, secondary=secondaryFilterName, c0=c0value, c1=c1Coeff, c2=c2Coeff) where c0-c2 are optional. For example (omitting c2): Colorterm(primary="g", secondary="r", c0=-0.00816446, c1=-0.08366937)
This is subclass of Config. That is a bit of a hack to make it easy to store the data in an appropriate obs_* package as a config override file. In the long term some other means of persistence will be used, at which point the constructor can be simplified to not require keyword arguments. (Fixing DM-2831 will also allow making a custom constructor).
Definition at line 41 of file colorterms.py.
def lsst.pipe.tasks.colorterms.Colorterm.getCorrectedMagnitudes | ( | self, | |
refCat, | |||
filterName | |||
) |
Return the colorterm corrected magnitudes for a given filter. Parameters ---------- refCat : `lsst.afw.table.SimpleCatalog` The reference catalog to apply color corrections to. filterName : `str` The camera filter to correct the reference catalog into. Returns ------- RefMag : `np.ndarray` The corrected AB magnitudes. RefMagErr : `np.ndarray` The corrected AB magnitude errors. Raises ------ KeyError Raised if the reference catalog does not have a flux uncertainty for that filter. Notes ----- WARNING: I do not know that we can trust the propagation of magnitude errors returned by this method. They need more thorough tests.
Definition at line 63 of file colorterms.py.
def lsst.pipe.tasks.colorterms.Colorterm.propagateFluxErrors | ( | self, | |
primaryFluxErr, | |||
secondaryFluxErr | |||
) |
Definition at line 137 of file colorterms.py.
def lsst.pipe.tasks.colorterms.Colorterm.transformMags | ( | self, | |
primary, | |||
secondary | |||
) |
Transform brightness.
[in] | primary | brightness in primary filter (magnitude) |
[in] | secondary | brightness in secondary filter (magnitude) |
Definition at line 127 of file colorterms.py.
def lsst.pipe.tasks.colorterms.Colorterm.transformSource | ( | self, | |
source | |||
) |
Transform the brightness of a source.
[in] | source | source whose brightness is to be converted; must support get(filterName) (e.g. source.get("r")) method, as do afw::table::Source and dicts. |
Definition at line 118 of file colorterms.py.
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Definition at line 59 of file colorterms.py.
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Definition at line 60 of file colorterms.py.
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Definition at line 61 of file colorterms.py.
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Definition at line 57 of file colorterms.py.
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Definition at line 58 of file colorterms.py.