J/A+A/428/1019ivo://CDS.VizieR/J/A+A/428/1019doi:10.26093/cds/vizier.34281019CDSMueller H.S.P.Menten K.M.Maeder H.2005-04-19T20:53:22Z2005-04-19T20:53:13ZCDS support team

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

cds-question@unistra.fratomic-physicsastrophysical-masersradio-astronomymolecular-cloudsWe report accurate laboratory measurements of selected methanol transition frequencies between 0.834 and 230GHz in order to facilitate astronomical velocity analyses. New data have been obtained between 10 and 27GHz and between 60 and 119GHz. Emphasis has been put on known or potential interstellar maser lines as well as on transitions suitable for the investigation of cold dark clouds. Because of the narrow line widths (<0.5km/s) of maser lines and lines detected in dark molecular clouds, accurate frequencies are needed for comparison of the velocities of different methanol lines with each other as well as with lines from other species. In particular, frequencies for a comprehensive set of transitions are given which, because of their low energy levels (<20cm^-1^ or 30K), are potentially detectable in cold clouds. Global Hamiltonian fits generally do not yet yield the required accuracy. Additionally, we report transition frequencies for other lines that may be used to test and to improve existing Hamiltonian models.2004A&A...428.1019Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/428/1019CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/413/233 : 12.2 GHz methanol survey (Blaszkiewicz+, 2004)J/A+A/432/737 : General Catalogue of 6.7GHz Methanol Masers (Pestalozzi+ 2005)J/A+AS/134/115 : Medicina 6.7GHz methanol masers survey (Slysh+ 1999)J/A+AS/143/269 : 6.7GHz methanol maser emission survey (Szymczak+, 2000)J/AZh/72/22 : A 95 GHz Survey of Methanol Masers (Valtts+, 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/428/1019https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/428/1019http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/428/1019https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/428/1019https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/428/1019http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/428/1019GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapRadiodefaultJ/A+A/428/1019/table1Methanol maser transitionsClassMaser type (1)charrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNote[g] g: lines discussed in Sect. 4.3 of the papercharTransTransition, J_k_ (2)n_Trans[*] Note on Trans (7)charFreqFrequencyMHzdoublee_FreqMeasurement uncertaintyMHzdoublen_Freq[h] Note on Freq (3)charElowLower state energy (4)cm**-1floatSmu2Line strength, S{mu}^2^ (D^2^)floatRef(1)Laboratory referencecharRef(2)Astronomical (table1) or dark cloud (table2) reference (5)charn_Ref(2)[* ND NO I] Note on Ref(2) (6)charJ/A+A/428/1019/table2Accurately known methanol transitions detected or potentially detectable in dark cloudsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intClassMaser type (1)charNote[g] g: lines discussed in Sect. 4.3 of the papercharTransTransition, J_k_ (2)n_Trans[*] Note on Trans (7)charFreqFrequencyMHzdoublee_FreqMeasurement uncertaintyMHzdoublen_Freq[h] Note on Freq (3)charElowLower state energy (4)cm**-1floatSmu2Line strength, S{mu}^2^ (D^2^)floatRef(1)Laboratory referencecharRef(2)Astronomical (table1) or dark cloud (table2) reference (5)charn_Ref(2)[* ND NO I] Note on Ref(2) (6)charJ/A+A/428/1019/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intRefReference codecharBibCodeBibCodecharAutAuthor's namecharComCommentscharJ/A+A/428/1019/table3Other methanol transitions measured in the course of the present investigationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intVt[0/1] Torsional stateintTransTransitionFreqFrequencyMHzdoublee_Freqrms uncertainty on FreqMHzfloatn_Freq[xT] Note on Freq (1)charNote[ND NO U] Note (2)char