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)

See also 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)

Serialization

• ASDF Serialization

Utilities

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