An Open Catalog for Supernova Data

TL;DR

The paper introduces the Open Supernova Catalog, an accessible, regularly updated online database of supernova observations and metadata, designed for easy community use and contribution, supporting future large-scale astronomical surveys.

Contribution

It provides a comprehensive, open-source, and easily accessible catalog of supernova data in JSON format, enabling community contributions and supporting future large-scale astronomical research.

Findings

Catalog contains over 36,000 supernovae and candidates.

Data is automatically updated daily from multiple sources.

The system is designed for easy community access and contribution.

Abstract

We present the Open Supernova Catalog, an online collection of observations and metadata for presently 36,000+ supernovae and related candidates. The catalog is freely available on the web (https://sne.space), with its main interface having been designed to be a user-friendly, rapidly-searchable table accessible on desktop and mobile devices. In addition to the primary catalog table containing supernova metadata, an individual page is generated for each supernova which displays its available metadata, light curves, and spectra spanning X-ray to radio frequencies. The data presented in the catalog is automatically rebuilt on a daily basis and is constructed by parsing several dozen sources, including the data presented in the supernova literature and from secondary sources such as other web-based catalogs. Individual supernova data is stored in the hierarchical, human- and machine-readable JSON format, with the entirety of each supernova's data being contained within a single JSON file bearing its name. The setup we present here, which is based upon open source software maintained via git repositories hosted on github, enables anyone to download the entirety of the supernova dataset to their home computer in minutes, and to make contributions of their own data back to the catalog via git. As the supernova dataset continues to grow, especially in the upcoming era of all-sky synoptic telescopes which will increase the total number of events by orders of magnitude, we hope that the catalog we have designed will be a valuable tool for the community to analyze both historical and contemporary supernovae.