IOSACal is an open source program for calibration of radiocarbon dates.

A few days ago I released version 0.4, that can be installed from PyPI or from source. The documentation and website is at http://c14.iosa.it/ as usual. You will need to have Python 3 already installed.

The main highlight of this release are the new classes for summed probability distributions (SPD) and paleodemography, contributed by Mario Gutiérrez-Roig as part of his work for the PALEODEM project at IPHES.

A bug affecting calibrated date ranges extending to the present was corrected.

On the technical side the most notable changes are the following:

• requires NumPy 1.14, SciPy 1.1 and Matplotlib 2.2
• removed dependencies on obsolete functions
• improved the command line interface

You can cite IOSACal in your work with the DOI https://doi.org/10.5281/zenodo.630455. This helps the author and contributors to get some recognition for creating and maintaining this software free for everyone.