HASH: the Hong Kong/AAO/Strasbourg H-alpha planetary nebula database

TL;DR

HASH is a comprehensive, reliable online database of all known Galactic planetary nebulae, integrating recent discoveries and verified data to support advanced astronomical research.

Contribution

It provides the first accessible, verified, and comprehensive online SQL database of Galactic PNe, including multi-wavelength data and tools for detailed investigation.

Findings

Reliable removal of PN mimics and false IDs

Accurate positions, sizes, and morphologies of PNe

Integration of multi-wavelength imagery and spectroscopy

Abstract

By incorporating our major recent discoveries with re-measured and verified contents of existing catalogues we provide, for the first time, an accessible, reliable, on-line SQL database for essential, up-to date information for all known Galactic PNe. We have attempted to: i) reliably remove PN mimics/false ID's that have biased previous studies and ii) provide accurate positions, sizes, morphologies, multi-wavelength imagery and spectroscopy. We also provide a link to CDS/Vizier for the archival history of each object and other valuable links to external data. With the HASH interface, users can sift, select, browse, collate, investigate, download and visualise the entire currently known Galactic PNe diversity. HASH provides the community with the most complete and reliable data with which to undertake new science.