PSF Photometry (photutils.psf)

This subpackage contains tools to perform point-spread-function (PSF) photometry.

Functions

extract_stars(data, catalogs, *[, size])	Extract cutout images centered on stars defined in the input catalog(s).
fit_2dgaussian(data, *[, xypos, fwhm, ...])	Fit a 2D Gaussian model to one or more sources in an image.
fit_fwhm(data, *[, xypos, fwhm, fit_shape, ...])	Fit the FWHM of one or more sources in an image.
grid_from_epsfs(epsfs[, grid_xypos, meta])	Create a GriddedPSFModel from a list of ImagePSF models.
make_psf_model(model, *[, x_name, y_name, ...])	Make a PSF model that can be used with the PSF photometry classes (PSFPhotometry or IterativePSFPhotometry) from an Astropy fittable 2D model.
make_psf_model_image(shape, psf_model, ...)	Make an example image containing PSF model images.
stdpsf_reader(filename[, detector_id])	Generate a GriddedPSFModel from a STScI standard- format ePSF (STDPSF) FITS file.
webbpsf_reader(filename)	Generate a GriddedPSFModel from a WebbPSF FITS file containing a PSF grid.

Classes

AiryDiskPSF(*[, flux, x_0, y_0, radius, ...])	A 2D Airy disk PSF model.
CircularGaussianPRF(*[, flux, x_0, y_0, ...])	A circular 2D Gaussian PSF model integrated over pixels.
CircularGaussianPSF(*[, flux, x_0, y_0, ...])	A circular 2D Gaussian PSF model.
CircularGaussianSigmaPRF(*[, flux, x_0, ...])	A circular 2D Gaussian PSF model integrated over pixels.
EPSFBuilder(*[, oversampling, shape, ...])	Class to build an effective PSF (ePSF).
EPSFFitter(*[, fitter, fit_boxsize])	Class to fit an ePSF model to one or more stars.
EPSFModel(data, *[, flux, x_0, y_0, ...])
EPSFStar(data, *[, weights, cutout_center, ...])	A class to hold a 2D cutout image and associated metadata of a star used to build an ePSF.
EPSFStars(stars_list)	Class to hold a list of EPSFStar and/or LinkedEPSFStar objects.
FittableImageModel(data, *[, flux, x_0, ...])
GaussianPRF(*[, flux, x_0, y_0, x_fwhm, ...])	A 2D Gaussian PSF model integrated over pixels.
GaussianPSF(*[, flux, x_0, y_0, x_fwhm, ...])	A 2D Gaussian PSF model.
GriddedPSFModel(nddata, *[, flux, x_0, y_0, ...])	A model for a grid of 2D ePSF models.
GriddedPSFModelRead(instance, cls)	Read and parse a FITS file into a GriddedPSFModel instance.
ImagePSF(data, *[, flux, x_0, y_0, origin, ...])	A model for a 2D image PSF.
IntegratedGaussianPRF(*[, flux, x_0, y_0, ...])
IterativePSFPhotometry(psf_model, fit_shape, ...)	Class to iteratively perform PSF photometry.
LinkedEPSFStar(stars_list)	A class to hold a list of EPSFStar objects for linked stars.
ModelGridPlotMixin()	Mixin class to plot a grid of ePSF models.
ModelImageMixin()	Mixin class to provide methods to calculate model images and residuals.
MoffatPSF(*[, flux, x_0, y_0, alpha, beta, ...])	A 2D Moffat PSF model.
PRFAdapter(psfmodel, *[, renormalize_psf, ...])
PSFPhotometry(psf_model, fit_shape, *[, ...])	Class to perform PSF photometry.
STDPSFGrid(filename)	Class to read and plot "STDPSF" format ePSF model grids.
SourceGrouper(min_separation)	Class to group sources into clusters based on a minimum separation distance.

Class Inheritance Diagram