J/other/NewA/11.ivo://CDS.VizieR/J/other/NewA/11.27CDSChen P.S.Fu H.W.Gao Y.F.2018-01-05T08:57:16Z2006-09-10T14:30:42ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsinfrared-sourcesinfrared-photometryThe 2MASS observations of known BL Lac objects are presented in this paper. The 2MASS associations for 511 BL Lac objects are identified. From the 2MASS near infrared two-color diagram it is seen that majority (about 70%) of objects are lying alone with or very close to the power law distribution implying that there is no need to invoke any significant radiation mechanism additional to a power law continuum for those sources. However, many sources (about 30%) are still located very close to the blackbody distribution indicative of the possible contributions from the host galaxies. In addition, the average spectral index derived for the near infrared region is 0.66+/-0.34 that is rather smaller than that from the previous results indicative of the possible influence from the host galaxies and/or from the lack or weakness of the radio emissions from most sources newly discovered by recent X-ray missions.2005NewA...11...27Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/NewA/11.27CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/252 : The USNO-A2.0 Catalogue (Monet+ 1998)I/284 : The USNO-B1.0 Catalog (Monet+ 2003)J/other/NewA/11.557 : BL Lac objects infrared photometry (Chen+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/NewA/11.27https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/NewA/11.27http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/NewA/11.27https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/NewA/11.27https://vizier.iucaa.in/viz-bin/votable?-source=J/other/NewA/11.27http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/NewA/11.27GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/NewA/11.27/table1 (2MASS observations of BL Lac objects)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/NewA/11.27/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/other/NewA/11.27/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/NewA/11.27/table1?GETtext/xml+votable180.050000true0.7827083-18.09708330.0055555555555555566/29 49 100 158 398 447 615 717 975 988 1085 1535 1702 2094 2117 2249 2273 2295 2340 2414 2484 2505 2549 2610 2621 2647 2650 2708 2792 3023 3096 3431 3537 3710 3876 3882 3974 4048 4054 4255 4317 4472 4685 4695 4705 4770 4798 4861 4882 4964 4974 5072 5091 5139 5156 5191 5270 5279 5311 5361 5463 5483 5510 5516 5522 5529 5536 5614 5673 5721 5723 5792 5800 5836 5844 5918 5958 6015 6018 6021 6067 6088 6160 6200 6204 6232 6237 6242 6254 6348 6361 6362 6427 6436 6475 6483 6502 6504 6507 6527 6534 6636 6647 6764 6815 6848 6996 7038 7176 7233 7235 7265 7296 7354 7410 7448 7518 7553 7570 7640 7699 7871 7896 8008 8067 8071 8134 8137 8143 8177 8374 8515 8543 8556 8595 8615 8665 8717 8909 8915 8943 8945 8955 8972 8982 9009 9013 9049 9060 9104 9165 9196 9202 9301 9310 9344 9383 9464 9501 9554 9566 9570 9613 9614 9618 9637 9684 9711 9762 9773 9811 9872 9877 9984 9991 10071 10183 10198 10220 10280 10369 10455 10511 10512 10514 10560 10561 10572 10605 10625 10627 10656 10669 10715 10800 10805 10810 10843 10921 10938 10980 11107 11126 11153 11212 11253 11321 11343 11352 11374 11429 11430 11444 11449 11514 11522 11639 11649 11676 11682 11734 11736 11778 11795 11800 11876 11912 11925 11936 12009 12102 12164 12218 12231 12323 12599 12639 13586 13613 13674 13705 13820 13927 15037 15059 15211 15269 15306 15311 15495 15916 15969 16027 16059 16272 16281 16447 16478 16499 16502 16527 16532 16562 16606 16649 16796 16952 17048 17153 17161 17193 17351 17516 17537 17574 17579 17602 17617 17665 17755 17775 17805 17820 17843 17917 18003 18020 18037 18074 18096 18219 18270 18324 18388 18457 18491 18498 18588 18683 18772 18853 18992 19034 19042 19190 19200 19271 19405 19500 19523 19553 19566 19756 19789 19831 19890 19907 20020 20065 20083 20141 20292 20325 20611 20624 20764 20777 21179 21758 21764 21960 21968 21972 22363 22372 22722 22753 22823 22993 23011 23015 23085 23127 23134 23208 23222 23416 23526 24027 24099 24362 24681 24785 24796 24902 25061 25132 25519 25542 25734 25832 26056 26073 26083 26242 26248 26282 26322 26360 26406 26550 26571 26595 26614 26626 26695 26798 26939 26964 26983 27021 27032 27063 27217 27524 27716 27722 27726 27750 27846 27945 27957 28043 28115 28138 28139 28148 28199 28343 28352 28388 28401 28432 28454 28481 28492 28517 28542 28546 28554 28561 28603 28664 29017 29788 30012 31389 31472 31663 32261 32311 32345 32495 32621 32902 33583 33823 33880 34209 34461 34514 34520 34531 34572 34668 34721 34771 35076 35079 35199 35301 35384 35680 35786 35821 35951 35963 35981 36008 36037 36058 36134 36155 36278 36295 36342 36459 36548 36737 36842 36956 38481 38772 38880 40351 40432 40479 40689 40692 40809 40885 43337 43399 43603 43945 44147 44247 44669 44813 44820 45038 46142 46258 46374 46442 46444 46481 46510 46545 46740 46918 46966 47004 47014 47154 47375 48245 48443 48603 48629 48639 48975 489858.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/NewA/11.27?format=asciiInfrareddefaultJ/other/NewA/11.27/table12MASS observations of BL Lac objectsz? Redshiftsrc.redshiftfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.recordintNameBL Lac object Namemeta.id;meta.maincharUSNOUSNO-A2 or USNO-B1 numbermeta.idcharn_USNO[AB] USNO-A2 (A) or USNO-B1 (B)meta.notecharRAJ20002MASS Right ascension (J2000)pos.eq.ra;meta.mainDEJ20002MASS Declination (J2000)pos.eq.dec;meta.mainr1Distance between BL Lac object and related USNO sourcearcsecpos.angDistancefloatr2Distance between USNO source and related 2MASS sourcearcsecpos.angDistancefloatVmag? V magnitudemagphot.mag;em.opt.VfloatnullableJmag2MASS J magnitudemagphot.mag;em.IR.Jfloatn_Jmag[*] * indicates an upper limit for Jmagmeta.notechare_Jmag? rms uncertainty on Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag2MASS H magnitudemagphot.mag;em.IR.Hfloatn_Hmag[*] * indicates an upper limit for Hmagmeta.notechare_Hmag? rms uncertainty on Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmag2MASS K magnitudemagphot.mag;em.IR.Kfloatn_Kmag[*] * indicates an upper limit for Kmagmeta.notechare_Kmag? rms uncertainty on Kmagmagstat.error;phot.mag;em.IR.Kfloatnullablealpha(J-K)? Power spectral index between J and K bandsspect.indexfloatnullableTypeType of object (1)src.classcharrad[*st ] Radio note (2)meta.notecharu_Av[)] Uncertainty flag on Avmeta.code.errorcharAv? Interstellar extinction coefficient Avmagphys.absorption.coefffloatnullableHost[#] #: possible influence from the host galaxymeta.notecharLinksSimbad column added by the CDSmeta.ref.urlchar