Millions of Optical Radio/X-Ray (MORX) Associations Catalog, Version 2

The Millions of Optical Radio/X-ray Associations (MORX) catalog combines all of the largest published optical, radio, and X-ray sky catalogs to find probable radio/X-ray associations with optical objects, plus double radio lobes, using uniform processing against all input data. This catalog contains 3,115,575 optical objects. Each object has optical coordinates (of the epoch of its photometry), its original name (if any), object class, red and blue optical magnitudes, PSF class, redshift (if any), the citations for the name and redshift, and the likelihoods of the radio/X-ray associations and that the object (if unclassified) should be a QSO, galaxy, or star. Each object may have up to four X-ray identifiers, up to five radio identifiers, and up to two double radio lobe identifiers. MORX is a compendium of optical objects which are calculated as being associated with Chandra, XMM-Newton, Swift, or ROSAT X-ray sources, or with NVSS, FIRST, VLASS, LoTSS, RACS, or SUMSS radio sources or double radio lobes. All have likelihoods in the range of 40-100% confidence in their associations. The counts of the associations for this main sample are as follows: &lt;pre&gt; Optical objects (rows in this catalog) - 3,115,575 Chandra - 102,652 X-ray associations XMM-Newton - 263,649 X-ray associations Swift - 120,647 X-ray associations ROSAT - 31,750 X-ray associations XMM Slew - 11,428 X-ray associations VLASS - 439,283 core radio associations, plus 15,763 double radio lobes(*). LoTSS - 1,804,886 core radio associations, plus 73,142 double radio lobes. RACS - 582,668 core radio associations, plus 12,009 double radio lobes. FIRST - 275,552 core radio associations, plus 9000 double radio lobes. NVSS - 316,039 core radio associations, plus 675 double radio lobes. SUMSS - 47,549 core radio associations, plus 42 double radio lobes. &lt;/pre&gt; (*) Lobe pairs are presented once only, so not from multiple radio surveys. MORX and &lt;a href="/W3Browse/all/milliquas.html"&gt;Milliquas&lt;/a&gt; are extracted from the same master data pool. All data quality rules pertaining to Milliquas also hold for MORX. The radio/X-ray source prefixes, and their source catalog home pages that are cited in this table, are as follows: &lt;pre&gt; FIRST: VLA FIRST survey, 13Jun05 version, &lt;a href="https://sundog.stsci.edu"&gt;https://sundog.stsci.edu&lt;/a&gt; VLA (abbrev of VLASS1QLCIR): VLASS Quick Look, &lt;a href="https://cirada.ca/catalogues"&gt;https://cirada.ca/catalogues&lt;/a&gt; RACS: Rapid ASKAP Continuum Survey, 2021,PASA,38,58, &lt;a href="https://research.csiro.au/racs/"&gt;https://research.csiro.au/racs/&lt;/a&gt;, main source file RACD: RACS as above, but from their main detection (&quot;Gaussian&quot;) file ILT: LoTSS-DR2 (LOFAR Two-metre Sky Survey), 2022,A&amp;A,659,A1, &lt;a href="https://lofar-surveys.org/"&gt;https://lofar-surveys.org/&lt;/a&gt;, main source catalog ILD: LoTSS-DR2 as above, but from their main detection (&quot;Gaussian&quot;) file NVSS: NRAO VLA sky survey, &lt;a href="https://www.cv.nrao.edu/nvss"&gt;https://www.cv.nrao.edu/nvss&lt;/a&gt; SUMSS: Sydney U. Molonglo, &lt;a href="http://www.astrop.physics.usyd.edu.au/sumsscat/"&gt;http://www.astrop.physics.usyd.edu.au/sumsscat/&lt;/a&gt; MGPS: Molonglo galactic plane, www.astrop.physics.usyd.edu.au/mgpscat/ 1RXH: ROSAT HRI (high resolution), &lt;a href="https://cdsarc.cds.unistra.fr/cat/?IX/28A"&gt;https://cdsarc.cds.unistra.fr/cat/?IX/28A&lt;/a&gt; 2RXP: ROSAT PSPC (proportional), &lt;a href="https://cdsarc.cds.unistra.fr/cat/?IX/30"&gt;https://cdsarc.cds.unistra.fr/cat/?IX/30&lt;/a&gt; 2RXF: &lt;a href="https://heasarc.gsfc.nasa.gov/W3Browse/rosat/rospspcftot.html"&gt;https://heasarc.gsfc.nasa.gov/W3Browse/rosat/rospspcftot.html&lt;/a&gt; 1WGA: White, Giommi &amp; Angelini, &lt;a href="https://heasarc.gsfc.nasa.gov/wgacat/"&gt;https://heasarc.gsfc.nasa.gov/wgacat/&lt;/a&gt; CXOG: Chandra ACIS source catalog, Wang S. et al., 2016,ApJS,224,40 CXO: Chandra Source Catalog v1.1, &lt;a href="https://asc.harvard.edu/csc1/"&gt;https://asc.harvard.edu/csc1/&lt;/a&gt; 2CXO: Chandra Source Catalog v2.0, &lt;a href="https://asc.harvard.edu/csc2/"&gt;https://asc.harvard.edu/csc2/&lt;/a&gt; CXOX: XAssist Chandra, &lt;a href="https://asd.gsfc.nasa.gov/xassist/pipeline4/chandra/"&gt;https://asd.gsfc.nasa.gov/xassist/pipeline4/chandra/&lt;/a&gt; 2XMM/2XMMi: XMM-Newton DR3, &lt;a href="https://cdsarc.cds.unistra.fr/cat/?IX/41"&gt;https://cdsarc.cds.unistra.fr/cat/?IX/41&lt;/a&gt; 4XMM: XMM-Newton DR13, &lt;a href="https://www.cosmos.esa.int/web/xmm-newton/xsa"&gt;https://www.cosmos.esa.int/web/xmm-newton/xsa&lt;/a&gt; XMMSL: XMM-Newton Slew Survey Release 2.0, same attribution as 4XMM XMMX: XAssist XMM-Newton, &lt;a href="https://asd.gsfc.nasa.gov/xassist/pipeline5/xmm/"&gt;https://asd.gsfc.nasa.gov/xassist/pipeline5/xmm/&lt;/a&gt; LSXPS: Swift X-ray Point Sources, &lt;a href="https://www.swift.ac.uk/LSXPS"&gt;https://www.swift.ac.uk/LSXPS&lt;/a&gt; (01July23) &lt;/pre&gt; RASS (ROSAT All-Sky Survey) is not included as its low resolution is not usable in isolation. Optical field solutions are calculated from the raw source positions of all these catalogs (except 2CXO) as described in the author&#39;s MORX v1 paper, 2016,PASA,33,52. This table was originally ingested by the HEASARC in May 2017. It was last updated in July 2023 to version 2 based upon the data file downloaded from the author&#39;s website at &lt;a href="https://quasars.org/morx.htm"&gt;https://quasars.org/morx.htm&lt;/a&gt;. &lt;p&gt; This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory,California Institute of Technology, under contract with the National Aeronautics and Space Administration. &lt;p&gt; This research has made use of the SIMBAD database and CDS cross-match service to obtain Gaia-EDR3 and Pan-STARRS photometry provided by CDS, Strasbourg, France. This is a service provided by NASA HEASARC .

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Organization: National Aeronautics and Space Administration