J/ApJ/524/536ivo://CDS.VizieR/J/ApJ/524/536doi:10.26093/cds/vizier.15240536CDSImpey C.D.Petry C.E.Flint K.P.2000-03-25T20:14:49Z2000-03-25T21:13:20ZCDS support team

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

cds-question@unistra.frquasarsspectroscopySpectroscopy of 10 quasars obtained with the Goddard High Resolution Spectrograph (GHRS) of the Hubble Space Telescope (HST) is presented. In the 10 sight lines, we detect 357 absorption lines above a significance level of 3{sigma} and 272 lines above a significance level of 4.5{sigma}. Automated software is used to detect and identify the lines, almost all of which are unresolved at the GHRS G140L resolution of 200km/s. After identifying Galactic lines, intervening metal lines, and higher order Lyman lines, we are left with 139 Ly{alpha} absorbers in the redshift range 0<z<0.22 (lines within 900km/s of geocoronal Ly{alpha} are not selected). These diffuse hydrogen absorbers have column densities that are mostly in the range 10^13^-10^15^cm^-2^ for an assumed Doppler parameter of 30km/s. The number density of lines above a rest equivalent width of 0.24{AA}, dN/dz=38.3{+/-}5.3, agrees well with the measurement from the Quasar Absorption-Line Key Project. There is marginal evidence for cosmic variance in the number of absorbers detected among the 10 sight lines.1999ApJ...524..536Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/524/536CatalogResearchIsServedByTAP VizieR generic servicerelated-toVII/23 : A catalogue of absorption lines in QSO spectraJ/ApJS/77/203 : QSO absorption systems (Junkkarinen+ 1991)J/ApJS/97/1 : HST Quasar Absorption Line Key Project. X. (Lockman+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/524/536https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/524/536http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/524/536https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/524/536https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/524/536http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/524/536GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapHSTOpticaldefaultJ/ApJ/524/536/table2Absorption-Line measurements & identificationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameQSO namecharSimbadask the SIMBAD data-base about this objectcharzQSO redshiftfloatNumberAbsorption line numberintWaveObserved vacuum heliocentric line wavelength in Angstroms0.1nmfloate_WaveError in Wave in Angstroms0.1nmfloatf_Wave[h] Flag on Wave (1)charEqWidthEquivalent width in Angstroms0.1nmfloate_EqWidthError in EqWidth in Angstroms0.1nmfloatFWHMFull Width Half Maximum in Angstroms (2)0.1nmfloate_FWHMError in the FWHM in Angstroms0.1nmfloatChi2The {Chi}^2^ of the line fitfloatSignifSignificance of the line width (3)floatSignifLSignificance of the line width (4)floatf_SignifL[i] Flag on SignifL (5)charzAbsorp? Redshift of the absorption systemdoublenullableIDLine identificationcharf_ID[*] Indicates excited transitionscharn_ID[fg] Note on ID (6)charRWave? Rest wavelength of linenmfloatnullablef_RWave[ab] Indicates one of the two strongest transitions of the N I 1200 angstrom tripletcharDWave? Wavelength residual in Angstroms (7)0.1nmfloatnullable