J/ApJS/184/133ivo://CDS.VizieR/J/ApJS/184/133doi:10.26093/cds/vizier.21840133CDSBrauer C.S.Pearson J.C.Drouin B.J.Yu S.2018-01-15T14:07:22Z2010-03-22T08:42:18ZCDS support team

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

cds-question@unistra.fratomic-physicsspectroscopyThe spectrum of ethyl cyanide, or propionitrile (CH_3_CH_2_CN), has been repeatedly observed in the interstellar medium with large column densities and surprisingly high temperatures in hot core sources. The construction of new, more sensitive, observatories accessing higher frequencies such as Herschel, ALMA, and SOFIA have made it important to extend the laboratory data for ethyl cyanide to coincide with the capabilities of the new instruments. We report extensions of the laboratory measurements of the rotational spectrum of ethyl cyanide in its ground vibrational state to 1.6THz. A global analysis of the ground state, which includes all of the previous data and 3356 newly assigned transitions, has been fitted to within experimental error to J=132, K=36, using both Watson A-reduced and Watson S-reduced Hamiltonians.2009ApJS..184..133Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/184/133CatalogResearchIsServedByTAP VizieR generic servicerelated-tohttp://spec.jpl.nasa.gov : JPL catalog home pagehttp://www.astro.uni-koeln.de/cdms/catalog : the Cologne Database forJ/A+A/466/255 : Isotopic ethyl cyanide (Demyk+, 2007)J/ApJS/181/433 : Spectrum of ethyl formate (Medvedev+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/184/133https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/184/133http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/184/133https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/184/133https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/184/133http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/184/133GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJS/184/133/reducExplanation of the unionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMmeta.notecharTTemperature (200, 300 or 500)Kphys.temperaturefloatnullableFreqFrequency of the lineMHzem.freqdoubleindexede_FreqEstimated or experimental error of FreqMHzstat.errordoublelgIntBase 10 logarithm of the integrated intensity in units of nm^2^MHz at 300K (1)log(nm**2.MHz)spect.line.intensityfloatE0Lower state energy relative to the ground statecm**-1phys.energy;phys.atmol.leveldoublegUpper state degeneracyphys.electron.degenintJ'Upper J quantum number (2)instr.det.qe;stat.maxcharKa'Upper Ka quantum number (2)phys.atmol.qn;stat.maxintKc'Upper Kc quantum number (2)phys.atmol.qn;stat.maxcharJ"Lower J quantum number (2)instr.det.qe;stat.mincharKa"Lower Ka quantum number (2)phys.atmol.qn;stat.minintKc"Lower Kc quantum number (2)phys.atmol.qn;stat.minchar