J/ApJS/216/22ivo://CDS.VizieR/J/ApJS/216/22doi:10.26093/cds/vizier.22160022CDSBhatt N.H.Cami J.2017-09-22T16:16:33Z2015-03-16T12:23:39ZCDS support team

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

cds-question@unistra.frinterstellar-mediumspectroscopyultraviolet-astronomyearly-type-starsWe present a comprehensive and sensitive unbiased survey of interstellar features in the near-UV range (3050-3700{AA}). We combined a large number of VLT/UVES archival observations of a sample of highly reddened early-type stars -typical diffuse interstellar band targets- and unreddened standards. We stacked the individual observations to obtain a reddened "superspectrum" in the interstellar rest frame with a signal-to-noise ratio exceeding 1500. We compared this to the analogous geocentric and stellar rest frame superspectra as well as to an unreddened superspectrum to find interstellar absorption features. We find 30 known features (11 atomic and 19 molecular) and tentatively detect up to 7 new interstellar absorption lines of unknown origin. Our survey is sensitive to narrow and weak features; telluric residuals preclude us from detecting broader features. For each sightline, we measured fundamental parameters (radial velocities, line widths, and equivalent widths) of the detected interstellar features. We also revisit upper limits for the column densities of small, neutral polycyclic aromatic hydrocarbon molecules that have strong transitions in this wavelength range.2015ApJS..216...22Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/216/22CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/eso : ESO Science Archive Catalog (ESO, 1991-2015)III/164 : Catalog of Eq.Widths of Interstellar 217nm Band (Friedemann 1992)II/135 : Suppl. to Diffuse Interstellar Band Measurements (Guarinos 1988)II/114 : UV Interstellar Extinction (Savage+ 1985)II/149 : Diffuse Interstellar Band Measurements (Snow+ 1977)III/39 : UV Bright Star Spectrophotometric Catalog (Jamar+, 1976)J/A+A/544/A136 : Diffuse Interstellar Bands in 150 stars (Raimond+, 2012)J/ApJS/199/8 : Interstellar column densities compil. (Gudennavar+, 2012)J/MNRAS/404/1321 : TiII in Milky way and Magellanic clouds (Welty+, 2010)J/A+A/510/A54 : NaI and CaII interstellar absorption (Welsh+, 2010)J/ApJ/705/32 : Diffuse interstellar bands from HD 183143 (Hobbs+, 2009)J/A+A/501/297 : Effective temperatures of B Supergiants (Zorec+, 2009)J/MNRAS/390/1733 : CN column densities & excitation temperatures (Slyk+, 2008)J/ApJ/663/320 : IR-through-UV extinction curve (Fitzpatrick+, 2007)J/MNRAS/367/1478 : Interstellar NaI, TiII + CaIIK obs. (Hunter+, 2006)J/ApJS/147/61 : Interstellar Ca I absorption (Welty+, 2003)J/A+A/411/447 : Interstellar NaI D-line (Lallement+, 2003)J/BaltA/11/1 : Interstellar extinction curves of OB stars (Wegner 2002)J/A+AS/118/481 : ROSAT all-sky survey cat. of OB stars (Berghoefer+ 1996)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/216/22https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/216/22http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/216/22https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/216/22https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/216/22http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/216/22GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/216/22/tablea1 (Basic data of our targets and observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/216/22/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/216/22/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/216/22/tablea1?GETtext/xml+votable180.050000true83.78445839.93415560.0055555555555555566/111 14522 17194 19009 19202 20322 20945 21234 21435 21438 22039 22805 22850 22858 22911 23007 23581 23717 25016 28672 28677 28687 28703 28711 28912 28915 28968 29085 29162 29513 29522 29537 29621 30356 30718 30722 30818 32364 34896 36121 37245 37584 37777 37900 37948 37990 38073 39243 39374 39679 39732 39793 41445 41464 41516 41610 41615 41631 41663 41689 41757 42213 42221 42283 42296 42383 42394 42408 42439 42470 42932 42980 42981 42994 43008 43019 43024 43030 43062 43226 43383 43460 44256 46343 47909 48534 48829https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/216/22?format=asciiUVdefaultJ/ApJS/216/22/tablea1Basic data of our targets and observationsSpTSIMBAD MK spectral typesrc.spTypecharNameTarget namemeta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNmNumber of lines of sight measurements (tablea2)meta.numberintnullableRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainE(B-V)[0/1.6]? Reddeningphot.color.excessfloatnullabler_E(B-V)E(B-V) reference (1)meta.ref;pos.framecharRV[-71/43]? SIMBAD heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricintnullablef_RV[*] Estimated RV (2)meta.codecharVism[-22.4/25.2]? Radial velocity from NaI line (3)km/sspect.dopplerVelocfloatnullableVism2? Vism from literature (3)km/sspect.dopplerVelocfloatnullabler_Vism2Vism2 reference (1)meta.ref;pos.framecharNo[1/18]? Number of observation(s) (4)meta.numberintnullableProgIDProgram ID (5)meta.id;obscharS/N[33/499]? Signal-to-noise ratio estimated from the co-added spectra between 3450-3452{AA}stat.snrintnullableTypeTarget type (R=reddened; ST=unreddened standard)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJS/216/22/tablea2Lines of sight measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameTarget identifiermeta.id;meta.maincharSpeciesSpecies identifier (1)meta.idlambda[3065.9/3679.9]? Heliocentric wavelength; in Angstroms0.1nmem.wl;pos.heliocentricdoublenullablee_lambda[0.001/0.05]? Uncertainty in lambda0.1nmstat.errorfloatnullableHRV[-51.9/32.4]? Heliocentric velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRV[0.1/4.3]? Uncertainty in HRVkm/sstat.errorfloatnullableEW[0.06/157] Equivalent width (m{AA}) (2)1e-13mspect.line.eqWidthfloate_EW[0/27.3] Uncertainty in EW1e-13mstat.error;spect.line.eqWidthfloatf_EWMulticomponent feature (3)meta.codecharFWHM? Full-Width at Half-Maximum (m{AA})1e-13mspect.line.widthfloatnullablee_FWHM? Uncertainty in FWHM1e-13mstat.error;phys.angSizefloatnullableFWHMv? Full-Width at Half-Maximum expressed in velocity unitskm/sspect.line.widthfloatnullablee_FWHMv? Uncertainty in FWHMvkm/sstat.errorfloatnullable