Color excess of SDSS quasars with DLA systems J/A+A/478/701 ivo://CDS.VizieR/J/A+A/478/701 doi:10.26093/cds/vizier.34780701 CDS Vladilo G. Prochaska J. Wolfe A.M. 2017-09-27T05:55:45Z 2008-05-26T09:39:45Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr quasars redshifted photometry We analyzed the spectroscopic and photometric database of the 5th data release of the Sloan Digital Sky Survey (SDSS) to search for evidence of the quasar reddening produced by dust embedded in intervening damped Ly{alpha} (DLA) systems. From a list of 5164 quasars in the interval of emission redshift 2.25<=z_e_<=3.5 and SDSS spectra with signal-to-noise ratio SNR>~4, we built up an "absorption sample" of 248 QSOs with a single DLA system in the interval of absorption redshift 2.2<z_a_<=3.5 and a "pool" of 1959 control QSOs without DLA systems or strong metal systems. For each QSO of the absorption sample we extracted from the pool a subset of control QSOs that are closest in redshift and magnitude. 2008A&A...478..701V https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/478/701 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to http://www.sdss.org/ : The SDSS Home Page J/MNRAS/354/L31 : SDSS DR2 QSO and DLA properties (Murphy+, 2004) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/478/701 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/478/701 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/478/701 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/478/701 https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/478/701 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/478/701 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/A+A/478/701/table1 (The DLA absorption sample of quasars) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/478/701/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/478/701/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/478/701/table1? GET text/xml+votable 180.0 50000 true 8.7578333 -9.3048889 0.005555555555555556 Cone search capability for table J/A+A/478/701/table2 (The pool of control quasars) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/478/701/table2? https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/478/701/table2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/478/701/table2? 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27944-27946 27948 27968-27970 28032 28034 28040 28168 28189-28190 28193 28197-28198 28202 28225-28226 28511 28567 28586-28587 28590-28591 28595-28596 28600 28603 28606-28607 28610-28611 28615 28618 28622-28623 28626-28629 28632 28636-28637 28647-28648 28658 28660 28662-28663 28665 28667 28669 28671 30036 30040 30045 31337 31355 31375 31401-31402 31406 31408 31420 31423 31436 31442 31453-31454 31458 31474-31475 31620 31623 31628 31631 31656 31685 31687 31697 32391 32397-32398 32402 32414-32415 32431 32439-32440 32442-32443 32447 32456 32481 32497 32509-32510 32680 36727 36759 36764 36766-36767 36778 36783-36784 36786 36790 36792 36805-36806 36809-36810 36812 45049 45055 49012 49078 49086 49094 49100 49103 49105 49124 49129-49130 2.85864675833786e-19 3.5010283109654867e-19 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/478/701?format=ascii Optical default J/A+A/478/701/table1 The DLA absorption sample of quasars recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int SDSS SDSS identifier of the DLA quasar (JHHMMSS.ss+DDMMSS.s) meta.id;meta.main char zem Emission redshift of the quasar src.redshift float rmag SDSS r magnitude mag phot.mag;em.opt.R float zabs Absorption redshift src.redshift float logN(HI) HI column density of the DLA system cm**-2 phys.columnDensity float d(zem) bin in zem of the subset of control quasars (1) stat.fit.param float d(rmag) bin in rmag of the subset of control quasars (2) mag stat.fit.param float <(r-z)0> Mean (r-z) color of the control sub-set (3) mag phot.color float e_<(r-z)0> Standard deviation of the mean <(r-z)_0> mag stat.error float <(g-z)0> Mean (g-z) color of the control sub-set (3) mag phot.color float e_<(g-z)0> Standard deviation of the mean <(g-z)_0> mag stat.error float D(r-z) Deviation from mean (r-z) color index (4) mag phot.color float e_D(r-z) Error of Delta(r-z) mag stat.error float D(g-z) ? Deviation from mean (g-z) color index (4) mag phot.color float nullable e_D(g-z) ? Error of Delta(g-z) mag stat.error float nullable SDSSdata Display the SDSS data meta.ref.url char Simbad Simbad column added by the CDS char _RA Right ascension (derived from SDSS) for Eq=J2000 deg pos.eq.ra;meta.main _DE Declination (derived from SDSS) for Eq=J2000 deg pos.eq.dec;meta.main
J/A+A/478/701/table2 The pool of control quasars recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int SDSS SDSS identifier of the control quasar (HHMMSS.ss+DDMMSS.s, J2000) meta.id;meta.main char zem emission redshift of the control quasar src.redshift float rmag SDSS r magnitude of the control quasar mag phot.mag;em.opt.R float S/N Mean signal-to-noise ratio of the SDSS spectrum (1) stat.snr;stat.mean int SDSSdata Display the SDSS data meta.ref.url char Simbad Simbad column added by the CDS char _RA Right ascension (derived from SDSS) for Eq=J2000 deg pos.eq.ra;meta.main _DE Declination (derived from SDSS) for Eq=J2000 deg pos.eq.dec;meta.main