An all-sky Atlas of Radio/X-ray Associations

TL;DR

This paper presents a comprehensive all-sky catalog linking optical objects with radio and X-ray sources, including probabilities of object types and literature identifications, based on data from multiple surveys and improved selection techniques.

Contribution

It introduces an updated all-sky radio/X-ray association catalog with refined object selection and processing, expanding previous work with new data and confidence assessments.

Findings

Catalog includes 602,570 objects with associations

Identifies 105,568 probable QSOs among uninvestigated objects

Provides probabilistic classifications and literature identifications for each object

Abstract

An all-sky comprehensive catalog of calculated radio and X-ray associations to optical objects is presented. Included are X-ray sources from XMM-Newton, Chandra and ROSAT catalogs, radio sources from NVSS, FIRST and SUMSS catalogs, and optical data, identifications and redshifts from the APM, USNO-A, SDSS-DR7 and the extant literature. This "Atlas of Radio/X-ray Associations" inherits many techniques from the predecessor Quasars.org (2004) catalog, but object selection is changed and processing tweaked. Optical objects presented are those which are calculated with >=40% confidence to be associated with radio/X-ray detections, totalling 602570 objects in all, including 23681 double radio lobe detections. For each of these optical objects I display the calculated percentage probabilities of its being a QSO, galaxy, star, or erroneous radio/X-ray association, plus any identification from the literature. The catalogue includes 105568 uninvestigated objects listed as 40% to >99% likely to be a QSO. The catalog is available at http://quasars.org/arxa.htm .