J/AJ/104/704ivo://CDS.VizieR/J/AJ/104/704doi:10.26093/cds/vizier.51040704CDSSramek R.A.Cowen J.J.Roberts D.A.Goss W.M.Ekers R.D.2023-04-06T16:49:25Z2000-08-22T11:53:05ZCDS support team

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

cds-question@unistra.frsupernova-remnantssurveysradio-sourcesIn the attempt to identify very young galactic supernova remnants (SNRs), 290 known compact (<2') galactic plane radio sources were observed at 20cm using the VLA in its 36 km configuration. The VLA observations described could detect supernovae with diameters between 5 and 20"; these would have an age of between 25 and 100 yr. Compact structure was detected in 168 (58%) of the 290 different sources observed; 73 sources (25%) were unresolved or slightly resolved point sources, 21 (7%) were single-well resolved, 56 (19%) were double, 18 (6%) were triple or complex. The large scale structure was completely resolved out for 122 (42%) of sources. Additional observations at 6cm with the VLA in the 11 km configuration were made of 14 sources with apparent shell structures that might have been characteristic of young SNRs. Low resolution observations were made at 20cm of 62 fields where the source was completely resolved out in the high resolution images. Only one source, G25.5+0.2, is a possible very young SNR. New H66_alpha recombination line observations place severe constrains on any thermal interpretation for this object.1992AJ....104..704Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/104/704CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/104/704https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/104/704http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/104/704https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/104/704https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/104/704http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/104/704GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/104/704/table1 (High resolution galactic plane radio SNR survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/104/704/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/104/704/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/104/704/table1?GETtext/xml+votable180.050000true266.189928-28.0545820.005555555555555556Cone search capability for table J/AJ/104/704/table2 (6cm observations of apparent shell structures)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/104/704/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/104/704/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/104/704/table2?GETtext/xml+votable180.050000true267.801003-26.6273010.005555555555555556Cone search capability for table J/AJ/104/704/table3 (Low resolution galactic plane radio SNR survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/104/704/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/104/704/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/104/704/table3?GETtext/xml+votable180.050000true269.644136-24.615540.0055555555555555565/5409 7206 7564 6/20820 20853 20861 21504 21506 21537 21543-21545 21547 21555 21560 21562 21632 21634-21635 21644 21648 21658 21661 21663 21665 21677 21682 21693 22021 22034 22040 22043 22071 22077 22079 22090 22113 22116 22120-22121 22138 22173 22175 22212-22213 22217-22218 22221 22227 22245 22256 22268-22269 23623 23636 23642 23644 23670 23675 23679 23761 23771-23772 23818 23842 23938 28715 28808 28812 28814 28837 28852 28870 28890-28891 28896-28897 28900-28901 28912 28915 28918-28919 29088 29096-29097 29100 29112 29114 29119 29504-29505 29508 29511 29513 29515 29519 29529 29534-29535 29537 29541 30210 30218-30219 30222 30240-30241 30244-30245 30260 30262-30263 30267-30269 30313 30315 30318-30319 30401 30416-30418 30420 30423 30506-30507 30592 30594-30595 30607 30622 30645 30688 30692 30694-30695 30706 30712-30713 30715 30719 39289 39292-39294 39371-39372 39384 39388 39390-39391 39395 39397 39405 39416 39419 39421-39422 39757 39759-39760 39762-39763 39780 39789 39795 39890-39891 39894 39900 39920 39923 39925 39934 40458 40488 40579 40582 40586 40612 40616 40619 42433 42437-42440 42443-42446 42456-42458 42461-42462 42471 424819.932213363424795e-25 3.313034785154005e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/104/704?format=asciiRadiodefaultJ/AJ/104/704/table1High resolution galactic plane radio SNR surveynote?Notesmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGLONGalactic Longitude (l2)degpos.galactic.lonGLATGalactic Latitude (b2)degpos.galactic.latfloatMSimbad column added by the CDSmeta.ref.urlcharRA1950Right Ascension hours (1950)pos.eq.ra;meta.mainDE1950Declination degrees (1950)pos.eq.dec;meta.mainl_s20cm[ <]Limit flag for 20cm fluxmeta.code.errorchars20cmPeak 20cm flux density in 3'x3' boxJyphot.flux.density;em.radio.750-1500MHzfloatstruct[PSDCE]Radio structure of dominant sourcemeta.code;src.morphcharobsEpoch of observationmeta.code;obscharrefReference of original surveymeta.ref;pos.framecharnewRAs?New Right Ascension (seconds only)spos.eq.ra;arith.diffcharnewDEm?New Declination (minutes only)arcminpos.eq.dec;arith.difffloatnullable_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/AJ/104/704/table26cm observations of apparent shell structuresrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGLONGalactic Longitude (l2)degpos.galactic.lonGLATGalactic Latitude (b2)degpos.galactic.latfloatRA1950?Right Ascension hours (1950)pos.eq.ra;meta.mainnullableDE1950?Declination degrees (1950)pos.eq.dec;meta.mainnullables6cmPeak 6cm flux densityJyphot.flux.density;em.radio.3-6GHzfloatSpIndexSpectral index between 6 and 20cmspect.index;em.radio.750-1500MHzfloatMType?Description of morphology of sourcesrc.morphchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/AJ/104/704/table3Low resolution galactic plane radio SNR surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGLONGalactic Longitude (l2)degpos.galactic.lonGLATGalactic Latitude (b2)degpos.galactic.latfloatRA1950?Right Ascension hours (1950)pos.eq.ra;meta.mainnullableDE1950?Declination degrees (1950)pos.eq.dec;meta.mainnullablel_s20cm[ <]Limit flag for 20cm fluxmeta.code.errorchars20cmPeak 20cm flux density in 3'x3' boxJyphot.flux.density;em.radio.750-1500MHzfloatstruct[PSDCE]Radio structure of dominant sourcemeta.code;src.morphcharnote1?Notes on general structuremeta.notecharnote2?Notes on individual sources; "listed source described in the table; other comments refer to additional sources in the image. Positions and flux densities are for the brightness maxima.meta.noteintnullable_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexed