nway

nway is a source cross-matching tool for arbitrarily many astronomical catalogues.

Features

Bayesian match probabilities based on astronomical sky coordinates (RA, DEC)
Works with arbitrarily many catalogues
Can handle varying errors
Can incorporate additional prior information, such as the magnitude or color distributions of the sources to match
Works accurately and fast in small areas and all-sky catalogues

Documentation

See the manual in the doc/ folder, https://github.com/JohannesBuchner/nway/raw/master/doc/nway-manual.pdf

A full worked example with demo catalogues is included.

Installation

The easiest way to install nway is with pip::

$ pip install nway

Add --user if you do not have admin privileges. Alternatively, download the source code and run "python setup.py install".

nway uses the following python packages:

numpy, scipy, matplotlib
astropy
tqdm
joblib
healpy
pandas

nway works with both Python 3 and Python 2 and various astropy versions.

.. image:: https://codecov.io/gh/JohannesBuchner/nway/branch/master/graph/badge.svg :target: https://codecov.io/gh/JohannesBuchner/nway .. image:: https://github.com/JohannesBuchner/nway/actions/workflows/tests.yml/badge.svg :target: https://github.com/JohannesBuchner/nway/actions/workflows/tests.yml

Reporting issues

Please file an issue on Github if you have any problems.

Citing nway correctly

Please cite Salvato et al (2017). https://arxiv.org/abs/1705.10711 (Get BibTex <http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2017arXiv170510711S&data_type=BIBTEX&db_key=PRE&nocookieset=1>_)

JohannesBuchner / nway

readme