FITSH -- a software package for image processing

TL;DR

FITSH is a comprehensive software package designed for processing and analyzing astronomical imaging data, offering a full pipeline of tools for calibration, astrometry, photometry, and data interpretation within a UNIX/POSIX environment.

Contribution

It introduces a standalone, versatile environment with integrated photometry methods and user-friendly interfaces, enhancing data analysis efficiency in astronomy.

Findings

Provides a complete data processing pipeline for astronomical images.

Includes multiple photometry techniques like image subtraction and PSF fitting.

Facilitates easy comparison of photometry methods for optimal results.

Abstract

In this paper we describe the main features of the software package named FITSH, intended to provide a standalone environment for analysis of data acquired by imaging astronomical detectors. The package provides utilities both for the full pipeline of subsequent related data processing steps (incl. image calibration, astrometry, source identification, photometry, differential analysis, low-level arithmetic operations, multiple image combinations, spatial transformations and interpolations, etc.) and for aiding the interpretation of the (mainly photometric and/or astrometric) results. The package also features a consistent implementation of photometry based on image subtraction, point spread function fitting and aperture photometry and provides easy-to-use interfaces for comparisons and for picking the most suitable method for a particular problem. This set of utilities found in the package are built on the top of the commonly used UNIX/POSIX shells (hence the name of the package), therefore both frequently used and well-documented tools for such environments can be exploited and managing massive amount of data is rather convenient.