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

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.