EffectivePSF¶

class grizli.utils.EffectivePSF[source]¶

Bases: object

Tools for handling WFC3/IR Effective PSF

PSF files stored in $GRIZLI/CONF/

Methods Summary

`eval_ePSF`(psf_xy, dx, dy[, rot90, extended_data])	Evaluate PSF at dx,dy coordinates
`fit_ePSF`(sci[, center, origin, ivar, N, ...])	Fit ePSF to input data TBD
`get_at_position`([x, y, filter, rot90])	Evaluate ePSF at detector coordinates TBD
`get_ePSF`(psf_params[, sci, ivar, origin, ...])	Evaluate an Effective PSF
`load_PSF_data`()	Load data from PSFSTD files
`objective_epsf`(params, self, psf_xy, sci, ...)	Objective function for fitting ePSFs
`objective_epsf_center`(params, self, psf_xy, ...)	Objective function for fitting ePSFs

Methods Documentation

eval_ePSF(psf_xy, dx, dy, rot90=0, extended_data=None)[source]¶

Evaluate PSF at dx,dy coordinates

TBD

fit_ePSF(sci, center=None, origin=[0, 0], ivar=1, N=7, filter='F140W', tol=0.0001, guess=None, get_extended=False, method='lm', ds9=None, psf_params=None, only_centering=True, rot90=0)[source]¶: Fit ePSF to input data TBD

get_at_position(x=507, y=507, filter='F140W', rot90=0)[source]¶: Evaluate ePSF at detector coordinates TBD

get_ePSF(psf_params, sci=None, ivar=1, origin=[0, 0], shape=[20, 20], filter='F140W', get_extended=False, get_background=False, rot90=0)[source]¶: Evaluate an Effective PSF

load_PSF_data()[source]¶

Load data from PSFSTD files

Files should be located in ${GRIZLI}/CONF/ directory.

static objective_epsf(params, self, psf_xy, sci, ivar, xp, yp, extended_data, ret, ds9)[source]¶

Objective function for fitting ePSFs

TBD

params = [normalization, xc, yc, background]

static objective_epsf_center(params, self, psf_xy, sci, ivar, xp, yp, extended_data, ret, ds9)[source]¶

Objective function for fitting ePSFs

TBD

params = [normalization, xc, yc, background]