PyReduce

A data reduction pipeline for echelle spectrographs (HARPS, UVES, XSHOOTER, CRIRES+, JWST/NIRISS, and more).

Based on the REDUCE package. See the papers:

• Piskunov & Valenti (2001) doi:10.1051/0004-6361:20020175
• Piskunov, Wehrhahn & Marquart (2021) doi:10.1051/0004-6361/202038293

Installation

# Using uv (recommended)
uv add pyreduce-astro

# Or pip
pip install pyreduce-astro

For development:

git clone https://github.com/ivh/PyReduce
cd PyReduce
uv sync

Quick Start

# Download sample data
uv run reduce download UVES

# Run reduction
uv run reduce run UVES HD132205 --steps bias,flat,orders,science

# Or run individual steps
uv run reduce bias UVES HD132205
uv run reduce flat UVES HD132205

Or use the Python API:

from pyreduce.pipeline import Pipeline

Pipeline.from_instrument(
    instrument="UVES",
    target="HD132205",
    night="2010-04-01",
    arm="middle",
).run()

Documentation

Full documentation at ReadTheDocs.

Output

PyReduce creates .ech files (standard FITS with binary table extension). Headers include original keywords plus PyReduce-specific ones prefixed with e_.