J/A+A/530/A147ivo://CDS.VizieR/J/A+A/530/A147doi:10.26093/cds/vizier.35300147CDSRamolla M.Haas M.Bennert V.N.Chini R.2018-01-04T08:21:25Z2011-05-26T09:30:45ZCDS support team

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

cds-question@unistra.frseyfert-galaxiesastrophysical-masersradio-astronomygalaxiesinfrared-sourcesx-ray-sourcesWe revisit the relation between H_2_O maser detection rate and nuclear obscuration for a sample of 114 Seyfert galaxies, drawn from the CfA, 12um and IRAS F25/F60 catalogs. These sources have mid-infrared spectra from the Spitzer Space Telescope and they are searched for X-ray and [OIII] (5007{AA}) fluxes from the literature. We use the strength of the [OIV] (25.9um) emission line as tracer for the intrinsic AGN strength. After normalization by [OIV] the observed X-ray flux provides information about X-ray absorption. The distribution of X-ray/[OIV] flux ratios is significantly different for masers and non-masers: The maser detected Seyfert-2s (Sy 1.8-2.0) populate a distinct X-ray/[OIV] range which is, on average, about a factor four lower than the range of Seyfert-2 non-masers and about a factor of ten lower than the range of Seyfert-1s (Sy 1.0-1.5). Non-masers are almost equally distributed over the entire X-ray/[OIV] range. This provides evidence that high nuclear obscuration plays a crucial role for the probability of maser detection. Furthermore, after normalization with [OIV], we find a similar but weaker trend for the distribution of the maser detection rate with the absorption of the 7um dust continuum. This suggests that the obscuration of the 7um continuum occurs on larger spatial scales than that of the X-rays. Hence, in the AGN unified model, at moderate deviation from edge-on, the 7um dust absorption may occur without proportionate X-ray absorption. The absorption of [OIII] appears unrelated to maser detections. The failure to detect masers in obscured AGN is most likely due to insufficient observational sensitivity.2011A&A...530A.147Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/530/A147CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/530/A147https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/530/A147http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/530/A147https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/530/A147https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/530/A147http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/530/A147GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/530/A147/table1 (*Master sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/530/A147/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/530/A147/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/530/A147/table1?GETtext/xml+votable180.050000true0.7900921.9601590.005555555555555556Cone search capability for table J/A+A/530/A147/table3 (Measured fluxes and literature values for sample and off-sample sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/530/A147/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/530/A147/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/530/A147/table3?GETtext/xml+votable180.050000true0.7921.96027780.0055555555555555566/909 941 995 1008 1405 2229 2251 2266 2309 2390 2564 3506 4215 4439 4488 4695 5052 5116 5284 5564 5975 6458 6977 7132 7157 7214 7241 7424 7446 7550 7552 7606 7642 7713 7741 7777 7869 7921 8299 8492 8673 8740 8845 8922 9287 9468 9672 9868 9882 10200 10265 10364 10404 10475 10817 10912 10927 10977 11027 11029 11101 11206 11490 12060 12306 12380 16655 16740 17061 17183 17525 17529 17727 17748 17754 17767 17850 18246 18484 18683 18783 18794 18838 18897 19070 19283 19296 19376 19619 19730 19883 20000 20230 20489 21016 21996 22632 22638 22654 23035 23171 23178 23197 23213 23233 23323 24896 25054 25083 25135 25518 25610 25790 25907 26148 26292 26932 27191 27767 27914 27937 27945 28015 28517 28593 28609 30027 30044 30114 30928 31158 31259 32370 32930-32931 33034 33325 33558 33704 33958 34099 34294 34531 34534 35447 35623 35691 35993 36299 36457 36618 36668 36716 36785 36861 37020 37531 38268 38703-38704 38868 40410 40432 40447 40818 41740 42016 43233 43339 43585 43677 43748 43806 43877 43925 44010 44169 44448 44507 44553 44660 44812 45587 45735 45779 45816 45883 46399 46442 46481 46615 46715 46811 46987 47047 47120 47169 47415 49042https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/530/A147?format=asciiX-rayInfraredRadiodefaultJ/A+A/530/A147/table1*Master samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_Name[s] s for sample sources (G1)meta.notecharNameNamemeta.id;meta.maincharRAJ2000J2000 right ascension in degreesdegpos.eq.ra;meta.mainDEJ2000J2000 declination in degreesdegpos.eq.dec;meta.mainONameOther namemeta.idcharSimbadNameSimbad column added by the CDSmeta.idcharJ/A+A/530/A147/table3Measured fluxes and literature values for sample and off-sample sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_Name[sa] a for Additional off-sample data (G1)meta.notecharNameSource namemeta.id;meta.maincharRef[abc, ] Catalog references for Name (1)meta.id;meta.datasetcharlogLM? H_2_O isotropic maser luminosities obtained from Bennert et al., 2009ApJ...695..276B (- for maser undetected source)log(solLum)phys.luminosityfloatnullablen_logLM[?*] Flag on maser luminosity (2)meta.notecharTypeSeyfert typesrc.morph.typefloatl_F[OIV]Limit flag on F[OIV]meta.code.errorcharF[OIV]? [OIV] flux measurement from Ramolla (2009, Thesis, Ruhr-Universitat, Bochum)aW.m**-2phot.fluxintnullablee_F[OIV]? rms uncertainty on F[OIV]aW.m**-2stat.errorintnullableF[OIII]? [OIII] literature fluxaW.m**-2phot.fluxintnullabler_F[OIII]? Reference for F[OIII], in refs.dat filemeta.ref;pos.frameintnullableFx? 2-10keV literature flux (in 10-14erg/cm2/s)10aW.m**-2phot.flux;em.X-rayintnullabler_Fx? Reference for F2-10keV, in refs.dat filemeta.ref;pos.frameintnullablel_F7umLimit flag on F7ummeta.code.errorcharF7um? 7um flux measurement from Ramolla (2009, Thesis, Ruhr-Universitat, Bochum)10aW.m**-2phot.flux.density;em.IR.4-8umintnullablee_F7um? rms uncertainty on F7um10aW.m**-2stat.errorintnullableSimbadNameSimbad column added by the CDSmeta.idchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/530/A147/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorchar