J/ApJS/75/801ivo://CDS.VizieR/J/ApJS/75/801doi:10.26093/cds/vizier.20750801CDSGriffith M.Langston G.Heflin M.Conner S.Burke B.CDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frradio-sourcessurveysThe MIT-Green Bank IV (MG IV) 5 GHz survey covers 0.504 sr of sky in the right ascension range 15.5 to 2.5 hours, between +37.00 and +50.98 degrees declination (B1950). The final MG IV catalog contains 3427 sources detected with a signal-to-noise ratio greater than 5. The catalog was produced from two separate north and south surveys with the National Radio Astronomy Observatory (NRAO) 91m transit telescope. The north survey was produced from data collected while scanning the telescope north from +39.0 to +50.98 degrees declination and the south survey from data collected from scans from +48.98 to +37.00 degrees declination. The completeness and reliability of the final source list is checked by examination of north and south source lists in a twice observed comparison region, lying between +39.15 and +48.83 degrees declination and excluding the area between +/-10 degrees Galactic latitude. The comparison region covers 0.270 sr of sky and contains 1094 sources. In this region, the MG IV catalog contains 423 sources brighter than 90 mJy and is shown to be 99.1 +/- 1.2% complete at this flux density level. Spectral indices are computed for sources identified in the NRAO 1400 MHz Survey (published by Condon and Broderick in 1985). A comparison of the spectral index distributions between +/- 10 and outside of +/- 10 degrees Galactic latitude is presented. Authors' addresses: MARK GRIFFITH, BERNARD BURKE, SAM CONNER, and MIKE HEFLIN: Room 26-335, Massachusetts Institute of Technology, Cambridge, MA 02139 (Phone 1-617-253-2572) GLEN LANGSTON National Radio Astronomy Observatory , Edgemont Road, Charlottesville, Va 22903 (Phone 1-804-296-0328) Nomenclature Note: The source names are derived from the J2000 coordinates; a 'J' was added in front of this name to comply with IAU recommendations on designations, and the suffix 'a' or 'b' was added for 132 sources with identical names.1991ApJS...75..801Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/75/801CatalogResearchIsServedByTAP VizieR generic serviceIsPreviousVersionOfVIII/52related-toVIII/52 : The MIT-Green Bank 5GHz Survey (Bennett+, 1986-91)VIII/38 : The Parkes-MIT-NRAO 4.85GHz (PMN) Surveys (Griffith+ 1993-1996)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/75/801https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/75/801http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/75/801https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/75/801https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/75/801http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/75/801GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefault