The Millions of Optical-Radio/X-ray Associations (MORX) Catalogue, v2

TL;DR

The MORX v2 catalogue compiles over three million probable optical-radio/X-ray associations across the entire sky, integrating data from major surveys to facilitate multi-wavelength astronomical research.

Contribution

This release provides an extensive, updated catalogue of optical-radio/X-ray associations with probabilistic likelihoods, including double radio lobes, covering the whole sky from multiple major surveys.

Findings

Over 3 million associations identified

Includes double radio lobes and unclassified objects

Integrates data from all major radio/X-ray surveys

Abstract

Announcing the release v2 of the MORX (Millions of Optical-Radio/X-ray Associations) catalogue which presents probable (40%-100% likelihood) radio/X-ray associations, including double radio lobes, to optical objects over the whole sky. Detections from all the largest radio/X-ray surveys to June 2023 are evaluated, those surveys being VLASS, LoTSS, RACS, FIRST, NVSS, and SUMSS radio surveys, and Chandra, XMM-Newton, Swift, and ROSAT X-ray surveys. The totals are 3,115,575 optical objects of all classifications (or unclassified) so associated. The MORX v2 catalogue is available on multiple sites.