J/A+A/500/1109ivo://CDS.VizieR/J/A+A/500/1109doi:10.26093/cds/vizier.35001109CDSCarvajal M.Margules L.Tercero B.Demyk K.Kleiner I.Guillemin J.C.,Lattanzi V.Walters A.Demaison J.Wlodarczak G.Huet T.R.,Mollendal H.Ilyushin V.V.Cernicharo J.2017-06-19T07:57:18Z2009-08-18T16:15:51ZCDS support team

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

cds-question@unistra.frinterstellar-mediumatomic-physicsradio-astronomyLaboratory measurements and analysis of the microwave and millimeter-wave spectra of potential interstellar molecules are a prerequisite for their subsequent identification by radioastronomical techniques. The spectral analysis provides spectroscopic parameters that are used in the assignment procedure of the laboratory spectra, and that also predict the frequencies of transitions not measured in the laboratory with a high degree of precision. An experimental laboratory study and its theoretical analysis is presented for ^13^C_2_-methyl formate (HCOO^13^CH_3_) allowing a search for this isotopologue in the Orion molecular cloud. The ^13^C_1_-methyl formate (H^13^COOCH_3_) molecule was also searched for in this interstellar cloud, using previously published spectroscopic data.2009A&A...500.1109Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/500/1109CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/500/1109https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/500/1109http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/500/1109https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/500/1109https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/500/1109http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/500/1109GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapRadiodefaultJ/A+A/500/1109/tablea1*^13^C2-Methylformate HCOO^13^CH_3_recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintvt0[0] Upper state vt (torsional) value (1)phys.atmol.qnintJ0Upper state J quantum number value (1)phys.atmol.qnintn_Ka0[*] * when two degenerate levels (1)meta.notecharKa0Upper state Ka quantum number value (1)phys.atmol.qnintKa0b? Second value for Ka0phys.atmol.qnintnullablen_Kc0P0[*] * when two degenerate levels (1)meta.notecharKc0P0Upper state KcP quantum number value (1)phys.atmol.qncharKc0P0bSecond value of Kc0P0phys.atmol.qncharvt1[0] Lower state vt (torsional) value (1)phys.atmol.qnintJ1Lower state J value (1)phys.atmol.qnintn_Ka1[*] * when two degenerate levels (1)meta.notecharKa1Lower state Ka quantum number value (1)phys.atmol.qnintKa1b? Second value of Ka1phys.atmol.qnintnullablen_Kc1P1[*] * when two degenerate levels (1)meta.notecharKc1P1Lower state KcP quantum number value (1)phys.atmol.qncharKc1P1bSecond value of Kc1P1phys.atmol.qncharFreqObserved vt=0 microwave transitions (2)MHzem.freqdoublee_Freqrms uncertainty on FreqkHzstat.errorintFreqCCalculated line frequencyMHzem.freq;spect.line;meta.modelleddoublee_FreqCrms uncertainty on FreqCkHzstat.errorintO-CObserved minus calculated frequencies valueMHzstat.fit.residualfloatSCalculated line strengthsD**2spect.line.strengthfloatElowLower state energy (3)cm**-1phys.energydoubleJ/A+A/500/1109/linesEmission lines (without high blend) of ^13^C-methyl formate present in the frequency range of the Orion KL surveyn_TempNotes, in notes.dat filemeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMolSimbad column added by the CDSmeta.id;phys.molcharTransTransition (J_Ka,Kc_)phys.atmol.transProb;phys.atmol.transitioncharFreqCalculated frequencyMHzem.freq;meta.modelleddoubler_Freq[as] References for Freq (1)meta.ref;pos.framecharSijLine strengthD**2spect.line.strengthfloatEuEnergy of the upper levelcm**-1phys.energy;phys.atmol.leveldoubleRestFreq? Observed (centroid) rest frequencies assuming that the radial velocities relative to LSR are 7.5km/sMHzem.freqdoublenullablen_RestFreq[b] b = blended with previous linemeta.notecharTemp? Observed temperature of main beam (at the peak of the line)Kphys.temperature;meta.mainfloatnullableTmean? Main beam temperature obtained with the modelKphys.temperature;meta.modelled;meta.mainfloatnullableJ/A+A/500/1109/notesNotesNoteNote codemeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTextText of the notemeta.note