J/ApJ/732/110ivo://CDS.VizieR/J/ApJ/732/110doi:10.26093/cds/vizier.17320110CDSJiang P.Ge J.Zhou H.Wang J.Wang T.2017-07-11T13:08:52Z2012-12-05T14:30:13ZCDS support team

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

cds-question@unistra.frquasarsredshiftedspectroscopyline-intensitiesextinctionWe report detections of 39 2175{AA} dust extinction bump candidates associated with strong MgII absorption lines at z~1-1.8 on quasar spectra in Sloan Digital Sky Survey (SDSS) DR3. These strong MgII absorption line systems are detected among 2951 strong MgII absorbers with a rest equivalent width W_r_{lambda}2796>1.0{AA} at 1.0<z<1.86, which is part of a full sample of 7421 strong MgII absorbers compiled by Prochter et al. (2006, Cat. J/ApJ/639/766). The redshift range of the absorbers is chosen to allow the 2175{AA} extinction features to be completely covered within the SDSS spectrograph operation wavelength range. An upper limit of the background quasar emission redshift at z=2.1 is set to prevent the Ly{alpha} forest lines from contaminating the sensitive spectral region for the 2175{AA} bump measurements. A total of 12 absorbers are detected with 2175{AA} bumps at a 5{sigma} level of statistical significance, 10 are detected at a 4{sigma} level, and 17 are detected at a 3{sigma} level. Most of the candidate bumps in this work are similar to the relatively weak 2175{AA} bumps observed in the Large Magellanic Cloud LMC2 supershell rather than the strong ones observed in the Milky Way.2011ApJ...732..110Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/732/110CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)J/ApJS/194/42 : SDSS-DR3 MgII-based black hole masses (Rafiee+, 2011)J/ApJ/698/819 : MgII and LRGs cross-correlation analysis (Lundgren+, 2009)J/ApJ/679/239 : Associated MgII absorbers (Vanden+, 2008)J/MNRAS/371/495 : Catalogue of MgII absorbers from SDSS DR3 (Bouche+, 2006)J/MNRAS/354/L25 : MgII absorbers in SDSS QSOs (Bouche+, 2004)J/ApJ/639/766 : SDSS-DR3 strong MgII absorbers (Prochter+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/732/110https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/732/110http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/732/110https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/732/110https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/732/110http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/732/110GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/732/110/absorbers (Combined table from original tables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/732/110/absorbers?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/732/110/absorbers?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/732/110/absorbers?GETtext/xml+votable180.050000true116.93433.16138890.005555555555555556Cone search capability for table J/ApJ/732/110/table2 (The list of rejected candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/732/110/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/732/110/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/732/110/table2?GETtext/xml+votable180.050000true0.590833315.24847220.0055555555555555566/4099 4136 4181 4775 4848 4851 5037 5054 5084 5095 5100 5117 5611 5626 5723 5731 5735 5755 5759 5772 5797 5802 5812 5816 5835 5852 5881 5901 5968 6000 6026 6044 6047 6092 6099 6108 6119 6123 6149 6160 6230 6249 6259 6267 6271 6385 6407 6416 6457 6464 6472 6473 6522 6527 6530 6544 6558 6580 6581 7198 7207 7227 7232 7234 7243 7250 7265 7275 7284 7292 7310 7329 7377 7379 7435 7488 7494 7496 7508 7518 8192 8195 8226 9325 9336 9345 9347 9383 9394 9611 9650 9656 9789 9805 9824 9834 9855 9861 9897 9910 10147 10590 10616 10699 10975 11037 11102 11138 11143 11163 11177 11184 11199 11228 11231 11234 11262 11310 11314 11326 11330 11331 11342 11370 11390 11398 11404 11413 11423 11440 11445 11451 11458 11459 11473 11475 11480 11520 11528 11787 11797 11829 11852 11880 11923 11947 12392 12480 16894 17149 17261 17315 17471 17494 17747 18067 18077 18414 18520 18540 18603 18750 18773 18780 18788 18790 18945 19007 19021 19056 19100 19136 19390 19429 19678 19697 19754 23047 23080 25596 25844 25934 25940 25953 25956 25958 25969 25981 26035 26038 26045 26050 26069 26076 26169 26184 26190 26196 26206 26252 26260 26308 26345 26353 26368 26371 27029 27060 27065 27070 27085 27117 27129 27213 27240 27247 27286 27314 27319 27320 27332 27337 27344 27396 27407 27433 27441 27442 27443 27465 27524 27733 27742 27825 30065 31373 31430 31437 32682 36774 36785 36787 36816 49106https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/732/110?format=asciiOpticaldefaultJ/ApJ/732/110/absorbersCombined table from original tablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS identification (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharSSimbad column added by the CDSmeta.ref.urlcharzem[1.18/2.04] Schneider et al. 2010, Cat. VII/260, emission line redshiftsrc.redshift;pos.heliocentricfloatzab[1.00/1.85] Prochter et al. 2006, Cat. J/ApJ/639/766, absorption line redshiftsrc.redshift;pos.heliocentricfloatEWMgII (2796) equivalent width; in Angstroms (1)0.1nmspect.line.eqWidthfloatD(g-i)Relative (g-i) color of background quasarmagphot.colorfloate_D(g-i)Uncertainty in D(g-i)magstat.errorfloatc1c_1_ parameter (2)magstat.fit.paramfloate_c1c1 uncertaintymagstat.errorfloatc2c_2_ parameter (2)magstat.fit.paramfloate_c2c2 uncertaintymagstat.errorfloatc3c_3_ parameter (2)magstat.fit.paramfloate_c3c3 uncertaintymagstat.errorfloatx0Peak position of Drude profile (x_0_) (2)um**-1pos;stat.maxfloate_x0x0 uncertaintyum**-1stat.errorfloatgammaFWHM of Drude profile ({gamma}) (2)um**-1stat.fit.paramfloate_gamma? Uncertainty in gammaum**-1stat.errorfloatnullableChi2{chi}^2^_{nu}_stat.fit.chi2floatSigSignificance ({sigma}) (3)stat.fit.goodnessfloatDR7qsoData from SDSS-DR7 quasar catalog (Schneider et al. 2010, Cat. VII/260)meta.ref.urlcharSloanData from SDSS online data for this quasarmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refchar_RAPosition from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from SDSS name (declination part)degpos.eq.dec;meta.mainJ/ApJ/732/110/table2The list of rejected candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS identification (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharzem[0.651/2.099] Schneider et al. 2010, Cat. VII/260, emission line redshiftsrc.redshift;pos.heliocentricfloatzab[1.00/1.84] Prochter et al. 2006, Cat. J/ApJ/639/766, absorption line redshiftsrc.redshift;pos.heliocentricfloatEWMgII (2796) equivalent width; in Angstroms (1)0.1nmspect.line.eqWidthfloatD(g-i)Relative (g-i) color of background quasarmagphot.colorfloate_D(g-i)Uncertainty in D(g-i)magstat.errorfloatf_gamma[mu] measurement or upper limit (2)meta.codechargammaFWHM of Drude profile {gamma}um**-1stat.fit.paramfloate_gamma? Uncertainty in gammaum**-1stat.errorfloatnullablef_Abump[mu] measurement or upper limit (2)meta.codecharAbump[0.04/6.13] Bump strength = {pi} c_3_/(2{gamma})phys.absorptionfloate_Abump? Uncertainty in Abumpstat.errorfloatnullableNote[a-c] Additional note (3)meta.notecharDR7qsoData from SDSS-DR7 quasar catalog (Schneider et al. 2010, Cat. VII/260)meta.ref.urlcharSloanData from SDSS online data for this quasarmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refchar_RAPosition from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from SDSS name (declination part)degpos.eq.dec;meta.mainJ/ApJ/732/110/table1Median composite DR7 quasar spectrumlambda[800/8550] Wavelength; in Angstroms0.1nmem.wlfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFlux[1.909/122.729] Monochromatic flux; arbitrary unitsphot.fluxfloate_FluxUncertainty in Fluxstat.error;phot.fluxfloat