# CalFUSE v3: A Data-Reduction Pipeline for the Far Ultraviolet Spectroscopic Explorer

## TL;DR

CalFUSE v3.2 is the latest data-reduction software for the FUSE mission, providing improved calibration and processing of ultraviolet spectroscopic data collected over two decades.

## Contribution

This paper introduces CalFUSE v3.2, detailing its calibration methods and data processing improvements for the FUSE ultraviolet spectroscopic data set.

## Key findings

- Reprocessed over 4600 observations with CalFUSE v3.2
- Enhanced calibration accuracy in the data reduction process
- Standardized data format for archived FUSE observations

## Abstract

Since its launch in 1999, the Far Ultraviolet Spectroscopic Explorer (FUSE) has made over 4600 observations of some 2500 individual targets. The data are reduced by the Principal Investigator team at the Johns Hopkins University and archived at the Multimission Archive at Space Telescope (MAST). The data-reduction software package, called CalFUSE, has evolved considerably over the lifetime of the mission. The entire FUSE data set has recently been reprocessed with CalFUSE v3.2, the latest version of this software. This paper describes CalFUSE v3.2, the instrument calibrations upon which it is based, and the format of the resulting calibrated data files.