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)