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photutils 3.0.1.dev126+ga04b27350

  • Getting Started
  • User Guide
    • Background Estimation (photutils.background)
    • Centroids (photutils.centroids)
    • Point-like Source Detection (photutils.detection)
    • General Source Detection and Extraction (photutils.segmentation)
    • Image Segmentation (photutils.segmentation)
    • Morphological Properties (photutils.morphology)
    • Aperture Photometry (photutils.aperture)
    • PSF Photometry (photutils.psf)
    • Building an effective Point Spread Function (ePSF)
    • Source Grouping
    • PSF Matching (photutils.psf_matching)
    • Radial Profiles (photutils.profiles)
    • Curves of Growth (photutils.profiles)
    • Elliptical Isophote Analysis (photutils.isophote)
    • Datasets and Simulation (photutils.datasets)
    • Utility Functions (photutils.utils)
    • Geometry Functions (photutils.geometry)
  • API Reference Guide
  • Development
  • Release Notes
  • User Guide

User Guide#

Photutils is a Python library that provides commonly-used tools and key functionality for detecting and performing photometry of astronomical sources. Photutils is organized into subpackages covering different topics, which are listed below.

Backgrounds#

  • Background Estimation (photutils.background)

Centroids#

  • Centroids (photutils.centroids)

Source Detection#

  • Point-like Source Detection (photutils.detection)
  • General Source Detection and Extraction (photutils.segmentation)

Segmentation and Source Measurements#

  • Image Segmentation (photutils.segmentation)
  • Morphological Properties (photutils.morphology)

Aperture Photometry#

  • Aperture Photometry (photutils.aperture)

PSF Photometry#

  • PSF Photometry (photutils.psf)
  • Building an effective Point Spread Function (ePSF)
  • Source Grouping

PSF Matching#

  • PSF Matching (photutils.psf_matching)

Profiles#

  • Radial Profiles (photutils.profiles)
  • Curves of Growth (photutils.profiles)

Elliptical Isophotes#

  • Elliptical Isophote Analysis (photutils.isophote)

Datasets and Simulation#

  • Datasets and Simulation (photutils.datasets)

Utilities#

  • Utility Functions (photutils.utils)
  • Geometry Functions (photutils.geometry)

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Background Estimation (photutils.background)

On this page
  • Backgrounds
  • Centroids
  • Source Detection
  • Segmentation and Source Measurements
  • Aperture Photometry
  • PSF Photometry
  • PSF Matching
  • Profiles
  • Elliptical Isophotes
  • Datasets and Simulation
  • Utilities

© Copyright 2011-2026, Photutils Developers.

Code of Conduct

Updated on 13 Jun 2026 , built with Sphinx 9.1.0