J/ApJS/97/1ivo://CDS.VizieR/J/ApJS/97/1doi:10.26093/cds/vizier.20970001CDSLockman F.J.Savage B.D.2013-03-06T06:18:40Z2000-04-03T21:23:25ZCDS support team

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

cds-question@unistra.frquasarsradial-velocityredshiftedh-i-line-emissionSensitive H I 21cm emission line spectra have been measured for the directions to 143 quasars and AGNs chosen from the observing lists for the HST Quasar Absorption Line Key Project. Narrow-band and wide-band data were obtained with the NRAO 43m radio telescope for each object. The narrow-band data have a velocity resolution of 1km/s, extend from -220 to +170km/s, and are corrected for stray 21cm radiation. The wide-band data have a resolution of 4km/s and extend from -1000 to +1000km/s. The data are important for the interpretation of ultraviolet absorption lines near zero redshift in Key Project spectra. Twenty-two percent of the quasars lie behind Galactic high-velocity H I clouds with |VLSR|>100km/s whose presence can increase the equivalent width of interstellar absorption lines significantly. This paper contains the emission spectra and measures of the H I velocities and column densities along the sight line to each quasar. We discuss how the measurements can be used to estimate the visual and ultraviolet extinction toward each quasar and to predict the approximate strength of the strong ultraviolet resonance lines of neutral gas species in the HST Key Project spectra.1995ApJS...97....1Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/97/1CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/PASP/106/646 : HST QSO absorption-line key project. VIII. (Kirhakos+ 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/97/1https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/97/1http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/97/1https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/97/1https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/97/1http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/97/1GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/97/1/table1 (Objects, velocities, and column densities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/97/1/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/97/1/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/97/1/table1?GETtext/xml+votable180.050000true1.49690816.1636060.005555555555555556HST6/0 1701 2074 2245 2630 4695 5091 5262 5306 5423 5722 5731 5791 5974 6111 6252 6264 6515 7176 7241 7488 7508 7604 7859 8017 8071 8282 8528 8812 8845 8858 8927 8941 8952 9031 9181 9633 9705 9955 9959 10039 10217 10298 10385 10422 10578 10659 10691 10807 10940 11217 11723 11829 11845 12025 12317 15351 16043 16093 16434 16665 17075 17488 17662 17713 17746 17755 17799 17827 17834 17866 17896 17898 18001 18005 18041 18125 18127 18180 18506 18756 18769 18912 19190 19271 19287 19315 19416 19567 19609 19700 19932 20099 21126 22659 22754 23323 25472 25742 26033 26082 26254 26292 26323 26454 26509 26615 26736 27023 27025 27720 27731 27826 27862 27909 28060 28164 28216 28356 28383 28471 28479 28527 28666 31995 34210 34531 34672 35528 35718 35906 36261 36313 38725 40344 44028 44908 44938 46588 47014 48965https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/97/1?format=asciiOpticalRadiodefaultJ/ApJS/97/1/table1Objects, velocities, and column densitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject namemeta.id;meta.maincharRA1950Right ascension (1950.0)pos.eq.ra;meta.mainDE1950Declinationpos.eq.dec;meta.mainGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latfloatVmagV magnitudemagphot.mag;em.opt.VfloatzRedshiftsrc.redshiftfloatl_E(B-V)Limit flag on E(B-V)meta.code.errorcharE(B-V)B-V colour excessmagphot.color.excessfloatV-Observed negative LSR velocity limit of HI emissionkm/sspect.dopplerVeloc;em.line.HIintV+Observed positive LSR velocity limit of HI emissionkm/sspect.dopplerVeloc;em.line.HIint<V>Average LSR velocity of the HI emissionkm/sspect.dopplerVeloc;em.line.HIintN(HI)iIntegrated HI column density assuming the emission to be optically thin1e+19cm**-2phys.columnDensityfloatN(HI)200Integrated HI column density assuming a spin temperature of 200K1e+19cm**-2phys.columnDensityfloatNoteComma-separated notes (see file notes.dat)meta.notechar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/ApJS/97/1/notesNumbered notesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoteNoNote number, repeated when several linesmeta.noteintTextText of notemeta.notechar