J/AJ/139/390ivo://CDS.VizieR/J/AJ/139/390doi:10.26093/cds/vizier.51390390CDSPlotkin R.M.Anderson S.F.Brandt W.N.Diamond-Stanic A.M.Fan X.,Hall P.B.Kimball A.E.Richmond M.W.Schneider D.P.Shemmer O.,Voges W.York D.G.Bahcall N.A.Snedden S.Bizyaev D.Brewington H.,Malanushenko V.Malanushenko E.Oravetz D.Pan K.Simmons A.2017-06-01T08:52:05Z2012-05-29T09:19:09ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsquasarsactive-galactic-nucleivisible-astronomysloan-photometryredshiftedWe present a sample of 723 optically selected BL Lac candidates from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7) spectroscopic database encompassing 8250deg^2^ of sky; our sample constitutes one of the largest uniform BL Lac samples yet derived. Each BL Lac candidate has a high-quality SDSS spectrum from which we determine spectroscopic redshifts for ~60% of the objects. Redshift lower limits are estimated for the remaining objects utilizing the lack of host galaxy flux contamination in their optical spectra; we find that objects lacking spectroscopic redshifts are likely at systematically higher redshifts.2010AJ....139..390Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/139/390CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)J/AJ/129/2542 : BL Lac from SDSS (Collinge+, 2005)J/AJ/135/2453 : Sample of BL Lac objects from SDSS and FIRST (Plotkin+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/139/390https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/139/390http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/139/390https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/139/390https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/139/390http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/139/390GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/139/390/Rloud (Observed and derived parameters of radio-loud BL Lac candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/139/390/Rloud?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/139/390/Rloud?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/139/390/Rloud?GETtext/xml+votable180.050000true0.4885-10.521480.005555555555555556Cone search capability for table J/AJ/139/390/Rquiet (Observed and derived parameters of weak-featured radio-quiet objects)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/139/390/Rquiet?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/139/390/Rquiet?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/139/390/Rquiet?GETtext/xml+votable180.050000true4.42437-10.937030.0055555555555555565/4831 6/2 4096 4098 4118 4134 4141 4146 4160 4190 4200 4255 4261 4276 4279 4318 4373 4384 4435 4472 4475 4499 4504 4507 4534 4543 4550 4562 4568 4591 4612 4617 4621 4629 4634 4638 4641 4642 4658 4672 4683 4684 4685 4686 4689 4695 4741 4795 4801 4805 4817 4824 4841 4855 4861 4862 4863 4865 4866 4869 4878 4882 4892 4902 4914 4923 4925 4928 4931 4960 4962 4963 4964 4974 4977 4999 5053 5072 5089 5091 5098 5110 5139 5156 5191 5195 5233 5270 5272 5284 5305 5311 5317 5330 5349 5361 5364 5365 5370 5405 5412 5413 5423 5432 5452 5455 5462 5483 5510 5516 5522 5523 5536 5546 5553 5569 5599 5614 5645 5657 5666 5677 5687 5698 5723 5726 5776 5784 5792 5796 5800 5844 5847 5860 5872 5881 5887 5918 5939 5960 5986 5990 6015 6018 6021 6022 6027 6067 6088 6096 6103 6110 6116 6132 6214 6242 6246 6255 6386 6404 6406 6409 6414 6427 6442 6464 6465 6499 6502 6507 6515 6527 6534 6554 6568 6619 6629 6636 6647 7176 7180 7233 7235 7247 7257 7265 7269 7280 7285 7296 7302 7319 7330 7343 7367 7380 7426 7433 7448 7474 7475 7478 7507 7518 7530 7553 7569 8203 8267 8290 8320 8321 8374 8378 8424 8509 8521 8542 8556 8559 8565 8595 8614 8630 8657 8665 8674 8696 8714 8729 8741 8746 8867 8915 8917 8931 8934 8945 8947 8955 8985 8995 8996 9003 9066 9103 9104 9114 9143 9149 9165 9196 9202 9221 9230 9239 9248 9264 9301 9310 9319 9327 9334 9344 9361 9370 9383 9405 9410 9422 9440 9445 9452 9472 9506 9514 9600 9601 9615 9618 9637 9762 9773 9811 9823 9824 9842 9855 9859 9860 9871 9879 9950 9960 9984 9985 9988 9991 9996 10061 10092 10105 10122 10154 10180 10202 10219 10244 10255 10258 10262 10280 10288 10298 10332 10346 10389 10409 10424 10440 10500 10510 10512 10514 10524 10526 10537 10540 10570 10572 10585 10605 10612 10615 10623 10625 10627 10656 10669 10715 10725 10727 10739 10748 10749 10756 10758 10766 10780 10788 10800 10801 10805 10810 10825 10829 10843 10848 10852 10867 10896 10900 10910 10912 10921 10938 10947 10949 10977 10980 10994 11004 11005 11011 11012 11034 11038 11064 11071 11100 11117 11120 11124 11138 11143 11153 11160 11168 11174 11176 11178 11195 11198 11209 11212 11223 11242 11246 11253 11260 11268 11290 11312 11321 11323 11352 11373 11374 11385 11396 11406 11413 11430 11444 11449 11456 11467 11514 11585 11778 11790 11795 11798 11832 11838 11849 11876 11912 11915 11936 12548 17213 17230 17239 17264 17293 17516 17574 17579 17602 17749 17753 17754 17755 17758 17768 17772 17820 18020 18028 18070 18090 18096 18402 18407 18604 18772 18853 18854 18950 19007 19033 19034 19042 19099 19105 19110 19405 19411 19671 19756 19841 19989 19993 21855 21879 21969 21972 22356 22364 23058 23181 23208 25582 25849 25855 25910 25936 25954 25955 25991 26006 26016 26026 26036 26056 26073 26074 26075 26083 26087 26100 26102 26203 26205 26228 26247 26256 26270 26275 26276 26277 26282 26305 26308 26310 26335 26337 26341 26366 26381 26406 26433 26443 26466 26470 26483 26536 26539 26550 26563 26565 26569 26571 26595 26596 26609 26614 26956 26964 26968 26980 26981 26983 26986 26998 27002 27003 27032 27036 27060 27063 27076 27082 27198 27217 27246 27247 27249 27251 27252 27257 27311 27319 27321 27329 27359 27380 27389 27405 27428 27442 27447 27466 27472 27496 27500 27524 27531 27554 27560 27564 27573 27591 27603 27612 27622 27631 27637 27653 27669 27671 27675 27797 27802 27805 27845 27846 27885 27893 27945 27955 27962 28001 28026 28037 28044 28101 28148 28165 28199 28217 28222 28225 28243 28244 28270 28271 28294 28342 28343 28352 28364 28388 28401 28402 28408 28414 28454 28478 28492 28498 28502 28517 28521 28542 28555 28561 28576 28595 28599 28613 28618 28620 28628 28629 28641 28647 28662 28664 28669 30035 30036 30038 30039 31318 31323 31338 31354 31423 31444 31454 31473 31485 31535 31544 31624 31656 31695 31698 31741 32399 32431 32442 32511 36719 36728 36779 36784 36801 49011 49019 49094 49124 491519.276497240453405e-25 9.276497240453405e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/139/390?format=asciiOpticaldefaultJ/AJ/139/390/RloudObserved and derived parameters of radio-loud BL Lac candidateszsp? Spectroscopic redshiftsrc.redshiftfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS source name (HHMMSS.ss+DDMMSS.s) (1)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainCl[HL] High or Low-confidence Classification (2)meta.code.qualcharNB[NY] Object appears as NED BL Lac object? (3)meta.codecharumagSDSS u-band apparent magnitudemagphot.mag;em.opt.UfloatgmagSDSS g-band apparent magnitudemagphot.mag;em.opt.BfloatrmagSDSS r-band apparent magnitudemagphot.mag;em.opt.RfloatimagSDSS i-band apparent magnitudemagphot.mag;em.opt.IfloatzmagSDSS z-band apparent magnitudemagphot.mag;em.opt.Ifloatq_zsp[LRTU] Redshift reliability (4)meta.code.qualcharC? CaII H/K break strengthspect.line.intensityfloatnullablealphaOptical spectral index referenced at 616.5nm {alpha}_{nu}_spect.indexfloatComments? Additional comments (5)meta.notecharSloanDisplay the SDSS data for this BL Lac objectmeta.ref.urlcharzgal? Host galaxy redshift limit (6)src.redshiftfloatnullableFAGNAGN component apparent magnitude (7)magphot.magfloatlogLoLog AGN component optical specific luminosity (8)log(1e-07W.Hz**-1)phys.luminosity;em.optfloatf_F1.4[FNUX] Radio flag, U=upper limit (9)meta.codecharF1.4? Radio flux density at observed-frame 1.4GHz (10)mJyphot.flux.density;em.radio.750-1500MHzdoublenullablelogLr? Log radio specific luminosity (11)log(1e-07W.Hz**-1)phys.luminosity;em.radiofloatnullablef_FX[RU] X-ray flag, U=upper limit (12)meta.codecharFXUnabsorbed X-ray flux in 10^-13^erg/scm^2^ (13)1e-16W.m**-2phot.flux;em.X-rayfloatlogLXLog X-ray specific luminosity (14)log(1e-07W.Hz**-1)phys.luminosity;em.X-rayfloata(ro)? Radio-optical spectral index {alpha}_ro_ (15)spect.indexfloatnullablea(oX)Optical-X-ray spectral index {alpha}_oX_ (16)spect.indexfloatNEDSimbad column added by the CDSmeta.refcharJ/AJ/139/390/RquietObserved and derived parameters of weak-featured radio-quiet objectsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS source name (HHMMSS.ss+DDMMSS.s) (1)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainCl[HL] High or Low-confidence Classification (2)meta.code.qualcharNB[NY] Object appears as NED BL Lac object? (3)meta.codecharumagSDSS u-band apparent magnitudemagphot.mag;em.opt.UfloatgmagSDSS g-band apparent magnitudemagphot.mag;em.opt.BfloatrmagSDSS r-band apparent magnitudemagphot.mag;em.opt.RfloatimagSDSS i-band apparent magnitudemagphot.mag;em.opt.IfloatzmagSDSS z-band apparent magnitudemagphot.mag;em.opt.Ifloatzsp? Spectroscopic redshiftsrc.redshiftfloatnullableq_zsp[LRTU] Redshift reliability (4)meta.code.qualcharC? CaII H/K break strengthspect.line.intensityfloatnullablealphaOptical spectral index referenced at 616.5nm {alpha}_{nu}_spect.indexfloatComments? Additional comments (5)meta.notecharSloanDisplay the SDSS data for this BL Lac objectmeta.ref.urlcharzgal? Host galaxy redshift limit (6)src.redshiftfloatnullableFAGNAGN component apparent magnitude (7)magphot.magfloatlogLoLog AGN component optical specific luminosity (8)log(1e-07W.Hz**-1)phys.luminosity;em.optfloatf_F1.4[FNUX] Radio flag, U=upper limit (9)meta.codecharF1.4? Radio flux density at observed-frame 1.4GHz (10)mJyphot.flux.density;em.radio.750-1500MHzdoublenullablelogLr? Log radio specific luminosity (11)log(1e-07W.Hz**-1)phys.luminosity;em.radiofloatnullablef_FX[RU] X-ray flag, U=upper limit (12)meta.codecharFXUnabsorbed X-ray flux in 10^-13^erg/scm^2^ (13)1e-16W.m**-2phot.flux;em.X-rayfloatlogLXLog X-ray specific luminosity (14)log(1e-07W.Hz**-1)phys.luminosity;em.X-rayfloata(ro)? Radio-optical spectral index {alpha}_ro_ (15)spect.indexfloatnullablea(oX)Optical-X-ray spectral index {alpha}_oX_ (16)spect.indexfloatNEDSimbad column added by the CDSmeta.refchar