lsst.afw.image._photoCalibContinued.PhotoCalib Class Reference

Public Member Functions
	getLocalCalibrationArray (self, x, y)
	instFluxToMagnitudeArray (self, instFluxes, x, y)
	magnitudeToInstFluxArray (self, magnitudes, x, y)

Detailed Description

Definition at line 33 of file _photoCalibContinued.py.

Member Function Documentation

getLocalCalibrationArray()

lsst.afw.image._photoCalibContinued.PhotoCalib.getLocalCalibrationArray	(		self,
			x,
			y )

Get the local calibration values (nJy/counts) for numpy arrays (pixels).

Parameters
----------
x : `np.ndarray` (N,)
    Array of x values (pixels).
y : `np.ndarray` (N,)
    Array of y values (pixels).

Returns
-------
localCalibration : `np.ndarray` (N,)
    Array of local calibration values (nJy/counts).

Definition at line 34 of file _photoCalibContinued.py.

    def getLocalCalibrationArray(self, x, y):
        """Get the local calibration values (nJy/counts) for numpy arrays (pixels).
 
        Parameters
        ----------
        x : `np.ndarray` (N,)
            Array of x values (pixels).
        y : `np.ndarray` (N,)
            Array of y values (pixels).
 
        Returns
        -------
        localCalibration : `np.ndarray` (N,)
            Array of local calibration values (nJy/counts).
        """
        if self._isConstant:
            return np.full(len(x), self.getCalibrationMean())
        else:
            bf = self.computeScaledCalibration()
            return self.getCalibrationMean()*bf.evaluate(x, y)
 

instFluxToMagnitudeArray()

lsst.afw.image._photoCalibContinued.PhotoCalib.instFluxToMagnitudeArray	(		self,
			instFluxes,
			x,
			y )

Convert instFlux (counts) to magnitudes for numpy arrays (pixels).

Parameters
----------
instFluxes : `np.ndarray` (N,)
    Array of instFluxes to convert (counts).
x : `np.ndarray` (N,)
    Array of x values (pixels).
y : `np.ndarray` (N,)
    Array of y values (pixels).

Returns
-------
magnitudes : `astropy.units.Magnitude` (N,)
    Array of AB magnitudes.

Definition at line 55 of file _photoCalibContinued.py.

    def instFluxToMagnitudeArray(self, instFluxes, x, y):
        """Convert instFlux (counts) to magnitudes for numpy arrays (pixels).
 
        Parameters
        ----------
        instFluxes : `np.ndarray` (N,)
            Array of instFluxes to convert (counts).
        x : `np.ndarray` (N,)
            Array of x values (pixels).
        y : `np.ndarray` (N,)
            Array of y values (pixels).
 
        Returns
        -------
        magnitudes : `astropy.units.Magnitude` (N,)
            Array of AB magnitudes.
        """
        scale = self.getLocalCalibrationArray(x, y)
        nanoJansky = (instFluxes*scale)*units.nJy
 
        return nanoJansky.to(units.ABmag)
 

magnitudeToInstFluxArray()

lsst.afw.image._photoCalibContinued.PhotoCalib.magnitudeToInstFluxArray	(		self,
			magnitudes,
			x,
			y )

Convert magnitudes to instFlux (counts) for numpy arrays (pixels).

Parameters
----------
magnitudes : `np.ndarray` or `astropy.units.Magnitude` (N,)
    Array of AB magnitudes.
x : `np.ndarray` (N,)
    Array of x values (pixels).
y : `np.ndarray` (N,)
    Array of y values (pixels).

Returns
-------
instFluxes : `np.ndarray` (N,)
    Array of instFluxes (counts).

Definition at line 77 of file _photoCalibContinued.py.

    def magnitudeToInstFluxArray(self, magnitudes, x, y):
        """Convert magnitudes to instFlux (counts) for numpy arrays (pixels).
 
        Parameters
        ----------
        magnitudes : `np.ndarray` or `astropy.units.Magnitude` (N,)
            Array of AB magnitudes.
        x : `np.ndarray` (N,)
            Array of x values (pixels).
        y : `np.ndarray` (N,)
            Array of y values (pixels).
 
        Returns
        -------
        instFluxes : `np.ndarray` (N,)
            Array of instFluxes (counts).
        """
        scale = self.getLocalCalibrationArray(x, y)
 
        if not isinstance(magnitudes, units.Magnitude):
            _magnitudes = magnitudes*units.ABmag
        else:
            _magnitudes = magnitudes
 
        nanoJansky = _magnitudes.to(units.nJy).value
 
        return nanoJansky/scale

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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/afw/g5a732f18d5+be83d3ecdb/python/lsst/afw/image/_photoCalibContinued.py