J/ApJ/714/476ivo://CDS.VizieR/J/ApJ/714/476doi:10.26093/cds/vizier.17140476CDSFortman S.M.Medvedev I.R.Neese C.F.De Lucia F.C.2017-06-26T11:50:32Z2012-05-21T10:25:18ZCDS support team

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

cds-question@unistra.fratomic-physicsspectroscopyinterstellar-mediumThere is a general consensus that many of the unidentified features in astrophysical spectra are due to low lying excited vibrational and torsional states of a few molecules -commonly referred to as the astrophysical weeds. This is a challenging spectroscopic problem not only because there are many such states, but also because these states are often highly perturbed and difficult to analyze. We have previously described an alternative approach based on experimental, intensity-calibrated spectra taken at many temperatures. In this paper, we describe the procedures and results obtained with this approach for ethyl cyanide, strategies for archiving and disseminating these results, and the prospects for using these results to reduce the confusion limit in the powerful new observatories that are coming online.2010ApJ...714..476Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/714/476CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJS/184/133 : New ground-state measurements of ethyl cyanide (Brauer+, 2009)J/ApJS/181/433 : Spectrum of ethyl formate (Medvedev+, 2009)J/A+A/493/565 : Deuterated and ^15^N ethyl cyanides (Margules+, 2009)J/A+A/466/255 : Isotopic ethyl cyanide (Demyk+, 2007)http://www.splatalogue.net/ : Splatalogue home page (database for astronomicalhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/714/476https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/714/476http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/714/476https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/714/476https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/714/476http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/714/476GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/714/476/table2Astrophysical catalogue in strength - lower state energy formatFqu[570103/644962] FrequencyMHzem.freqdoubleprimarySijmu2S_ij_{mu}^2^ coefficient (G1)D**2spect.line.intensitydoubleEE coefficient (G1)cm**-1phys.energy;phys.atmol.levelintFoMFigures of Meritmeta.code.qual;stat.valuecharJ/ApJ/714/476/table3Spectroscopic temperature and nL/Q parameter for each of the 271 scans, with the 0 index representing the theoretical 77K spectrum used in the analysesIndex[0/271] Index of the temperature scanmeta.idintprimarynL/QCorresponding (nL/Q) factornm**-2stat.paramdoubleTSpectroscopic TemperatureKphys.temperaturefloat