J/ApJS/93/211ivo://CDS.VizieR/J/ApJS/93/211doi:10.26093/cds/vizier.20930211CDSDiplas A.Savage B.D.2013-02-27T06:16:44Z1999-02-27T13:05:45ZCDS support team

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

cds-question@unistra.frvisible-astronomybroad-band-photometryredshiftedh-i-line-emissionultraviolet-astronomyWe measure Galactic interstellar neutral hydrogen column densities by analyzing archival interstellar Ly{alpha} absorption line data toward 554 B2 and hotter stars observed at high resolution with the IUE satellite. This study more than doubles the number of lines of sight with measures of N(H I) based on Ly{alpha}. We have included the scattered light background correction algorithm of Bianchi and Bohlin (1984A&A...134...31B) in our data reduction. We use the correlation between the Balmer discontinuity [c_1_] index and the stellar Ly{alpha} absorption in order to assess the effects of stellar Ly alpha contamination. Approximately 40% of the B stars with measured [c_1_] index, exhibit serious stellar Ly{alpha} contamination. Table 1 contains the derived values of the interstellar N(H I) for 393 stars with at most small amounts of stellar contamination. Table 2 lists the observed values of total N(H I) for 161 stars with suspected stellar Ly alpha contamination and/or uncertain stellar parameters.1994ApJS...93..211Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/93/211CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-to1994ApJ...427..274D : Paper II. Diplas & Savage, (1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/93/211https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/93/211http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/93/211https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/93/211https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/93/211http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/93/211GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/93/211/table1 (Interstellar atomic hydrogen column densities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/93/211/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/93/211/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/93/211/table1?GETtext/xml+votable180.050000true238.479883.97770.005555555555555556Cone search capability for table J/ApJS/93/211/table2 (Atomic hydrogen column densities for stars with suspected stellar Lyman-alpha contamination and/or uncertain stellar parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/93/211/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/93/211/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/93/211/table2?GETtext/xml+votable180.050000true3.312315.18890.005555555555555556IUE6/418 689 1196 1198 1293 1297 1539 1558 1633 1790 1946 2246 2409 2619 2716 2806 2809 2970 3011 3030 3053 3060 3214 3244 3251 3256 3301 3307 3318 3430 3665 3667 4473 5506 5544 6891 7195 9266 9478 10158 10471 10731 10794 11875 12249 12400 12443 12615 12765 12942 12943 12961 12972 13001 13040 13115 13255 13277 13281 13331 13557 13566 13703 13722 13729 13999 14008 14062 14079 14167 14179 14217 14240 14246 14263 14283 14305 14368 14387 14435 14443 14456 14630 14631 14640 14643 14646 14647 14649 14652 14653 14696 14743 14745 14801 14805 14810 14824 14825 15172 15250 15271 15369 15372 15375 15391 15462 15561 15580 15626 15631 15656 15662 15672 15683 15686 15689 15705 15748 16144 16534 17312 17321 17754 18439 18454 18712 18928 19202 19340 19402 19676 19757 20107 20337 20404 20581 20613 20782 20793 20834 20861 20915 21227 21228 21233 21324 21401 21430 21432 21435 21436 21438 21439 21447 21450 21482 21531 21635 21644 21646 21647 21655 21656 21997 22039 22058 22211 22216 22223 22246 22249 22253 22258 22264 22269 22503 22517 22579 22645 22772 22805 22837 22845 22854 22859 22861 22862 22884 22885 22889 22895 22911 22966 22992 22994 23360 23374 23637 23646 23647 23682 23717 23764 23769 23780 23851 23979 23982 23998 24151 24179 24266 24292 24338 24370 24462 24496 24555 24831 25659 25988 25993 26929 27095 27402 27498 28673 28687 28691 28702 28704 28759 28774 28796 28809 28864 28890 28891 28900 28915 29025 29036 29040 29089 29095 29134 29208 29463 29513 29522 29600 29621 29828 29839 29893 30722 30818 31063 31121 31705 31759 31795 32340 32380 32752 33652 34878 36043 37140 37209 37212 37231 37232 37248 37316 37323 37331 37332 37333 37334 37339 37584 37685 37716 37822 37833 37865 37869 37870 37893 37897 37898 37900 37906 37914 37915 37923 37926 37930 37932 37937 37948 37963 38016 38022 38024 38026 38037 38110 38449 38817 39075 39201 39202 39205 39216 39222 39227 39233 39241 39252 39274 39297 39327 39335 39347 39374 39375 39386 39671 39853 39861 39899 39907 39916 39931 39948 39971 40068 40492 41103 41146 41163 41174 41199 41249 41498 41510 41511 41528 41592 41598 41606 41610 41615 41630 41655 41673 41689 41698 41747 41750 41903 41916 41963 41982 41983 41994 41995 42075 42080 42116 42126 42178 42213 42214 42236 42296 42312 42324 42366 42383 42394 42395 42405 42408 42416 42417 42421 42428 42449 42477 42479 42483 42623 42652 42666 42671 42672 42691 42800 42948 42956 42959 42977 42994 43008 43016 43030 43040 43041 43042 43062 43086 43088 43099 43107 43130 43137 43165 43234 43294 43305 43307 43310 43338 43365 43397 43400 43407 43416 43538 44305 44312 44360 44378 44389 44469 44616 44717 44974 45594 45638 47105 47304 47717 47760 47781 48042 48199 48497 48534 48584 48663 48769https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/93/211?format=asciiUVOpticalRadiodefaultJ/ApJS/93/211/table1Interstellar atomic hydrogen column densitiesHD/BDHD or BD star namephys.abundcharNameOther namemeta.idcharGLONGalactic longitudedegpos.galactic.lonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGLATGalactic latitudedegpos.galactic.latSpTypeSpectral typesrc.spTypecharVmag? V magnitudemagphot.mag;em.opt.Vfloatnullableu_VmagUncertainty flag on Vmagmeta.code.errorcharB-V? B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatnullableE(B-V)? B-V colour excessmagphot.color.excessfloatnullableE2175? 2175A Bump strength measuremagphot.magfloatnullabler? Adopted distancepcpos.distanceintnullablez? Stellar distance above or below the Galactic planepcpos.distanceintnullablelog(N(HI))Observed HI density columnlog(cm**-2)phys.columnDensityfloate_log(N(HI))rms uncertainty on log(N(HI))log(cm**-2)stat.errorfloat[c1]? Stroemgren Balmer jump index corrected for for extinction ([c1]=c1-0.2(b-y))meta.code;spect.indexfloatnullablelog(N(HI))s? Stellar HI density column when [c1] availablelog(cm**-2)phys.columnDensityfloatnullablelog(N(HI))i? Interstellar HI density column corrected for stellar absorptionlog(cm**-2)phys.columnDensityfloatnullableRefReference (1)meta.ref;pos.frameint_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/ApJS/93/211/table2Atomic hydrogen column densities for stars with suspected stellar Lyman-alpha contamination and/or uncertain stellar parametersRefReference (1)meta.ref;pos.frameintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHD/BDHD or BD star namephys.abundcharNameOther namemeta.idcharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latSpTypeSpectral typesrc.spTypecharVmag? V magnitudemagphot.mag;em.opt.Vfloatnullableu_VmagUncertainty flag on Vmagmeta.code.errorcharB-V? B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatnullableE(B-V)? B-V colour excessmagphot.color.excessfloatnullableE2175? 2175A Bump strength measuremagphot.magfloatnullabler? Adopted distancepcpos.distanceintnullablez? Stellar distance above or below the Galactic planepcpos.distanceintnullablelog(N(HI))Observed HI density columnlog(cm**-2)phys.columnDensityfloate_log(N(HI))rms uncertainty on log(N(HI))log(cm**-2)stat.errorfloat[c1]? Stroemgren Balmer jump index corrected for for extinction ([c1]=c1-0.2(b-y))meta.code;spect.indexfloatnullablelog(N(HI))s? Stellar HI density column when [c1] availablelog(cm**-2)phys.columnDensityfloatnullablelog(N(HI))i? Interstellar HI density column corrected for stellar absorptionlog(cm**-2)phys.columnDensityfloatnullable_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexed