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.
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)
Licence
This program is free and open-source software, licensed under AGPLv3 (see LICENSE and COPYING files). Written by Johannes Buchner (C) 2013-2020