J/ApJS/271/20ivo://CDS.VizieR/J/ApJS/271/20doi:10.26093/cds/vizier.22710020CDSChen G.Zheng Z.Zeng X.Zhang L.Xiao H.Liu X.Cui L.Fan J.2024-11-06T20:31:03Z2024-06-03T11:33:05ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleigamma-ray-astronomyvisible-astronomyspectroscopyredshiftedbl-lacertae-objectsquasarsIn this work, we obtained a sample of 979 Fermi blazars with broad emission lines, including 701 objects collected from published works and 278 objects developed in this work. For the 278 objects, we made a crossmatch from three catalogs, the Fermi Large Area Telescope Fourth Source Catalog (4FGL), the Sloan Digital Sky Survey, and the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, and calculated the broad-line region (BLR) luminosity. Then, we estimated the Doppler factor and studied the correlations between the BLR luminosities and the {gamma}-ray luminosities, the synchrotron peak frequency ({nu}p), and Doppler factor ({delta}) for the whole sample. Our analyses and discussions came to the following main conclusions: For the 278 blazars, their BLR luminosity (log LBLR) ranges from 40.44 to 45.45erg/s, with a mean value of 43.39erg/s. The Doppler factor ranges from {delta}=0.45 to {delta}=88.52, with a mean value of 12.99 for the 979 Fermi blazars, which is consistent with the results in the literature. Both the BLR luminosity and the Doppler factor exhibit positive correlations with the {gamma}-ray luminosity. The BLR luminosity is anticorrelated with synchrotron peak frequency, implying a Compton cooling. A line of logL_BLR_=1.58log{nu}_p_-19.46 separating BL Lacertae objects and flat-spectrum radio quasars was obtained in the diagram of logL_BLR_ against log{nu}_p_ using a machine-learning method. Based on the analysis of the equivalent width and the Doppler factors, we proposed five changing-look blazar candidates.2024ApJS..271...20Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/271/20CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/156 : LAMOST DR7 catalogs (Luo+, 2019)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)IX/67 : Incremental Fermi LAT 4th source cat. (4FGL-DR3) (Fermi-LAT col., 2022)J/A+A/436/799 : X- & gamma-ray fluxes of blazars (Fan+, 2005)J/A+A/445/441 : SED of BL Lacertae objects (Nieppola+, 2006)J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)J/ApJ/748/49 : Opt. spectroscopy of 1LAC broad-line blazars (Shaw+, 2012)J/other/RAA/13.259 : {gamma}-ray Doppler factor for Fermi blazars (Fan+, 2013)J/other/RAA/14.1135 : Doppler factor for a Fermi blazar sample (Fan+, 2014)J/other/Nat/515.376 : Power of relativistic jets in blazars (Ghisellini+, 2014)J/ApJS/226/20 : X-ray, opt. & radio SEDs of Fermi blazars (Fan+, 2016)J/ApJS/224/26 : SEDs of Roma BZCAT blazars (Mao+, 2016)J/ApJ/835/L38 : Fermi blazars with Doppler factors (Fan+, 2017)J/ApJS/235/39 : Jet properties of {gamma}-ray-loud 3FGL AGNs (Chen, 2018)J/ApJ/866/137 : Blazars variability brightness temp. (Liodakis+, 2018)J/MNRAS/490/4770 : Classifying Fermi-LAT gamma-ray sources (Kovacevic+, 2019)J/ApJS/241/34 : SDSS Reverberation Mapping (SDSS-RM) project (Shen+, 2019)J/ApJS/253/10 : 12yrs of R-band phot. of the quasar 3C 454.3 (Fan+, 2021)J/ApJS/253/46 : Optical spectroscopy of Fermi blazars (Paliya+, 2021)J/AJ/161/196 : Opt. view of blazars with LAMOST. I. (Pena-herazo+, 2021)J/ApJS/263/24 : The 4LAC-DR3 catalog (Ajello+, 2022)J/ApJ/925/97 : Fermi-LAT-detected blazars fundamental param. (Pei+, 2022)J/ApJ/925/40 : Fermi blazar jet properties (Xiao+, 2022)J/PASJ/74/239 : Radio dichotomy of active galactic nuclei (Xiao+, 2022)J/ApJS/262/18 : Spectral energy distributions for 4FGL blazars (Yang+, 2022)J/ApJ/925/120 : Luminosities & peak freq. of 4FGL blazars (Yang+, 2022)http://fermi.gsfc.nasa.gov/ssc/data/access/lat/14yr_catalog/ : 4FGL-DR4http://www.lamost.org/dr8/v2.0/ : LAMOST DR8 v2.0https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/271/20https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/271/20http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/271/20https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/271/20https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/271/20http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/271/20GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/271/20/table1 (The 979 Fermi blazars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/271/20/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/271/20/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/271/20/table1?GETtext/xml+votable180.050000true359.69202119.9223070.0055555555555555566/39 60 110 172 180 376 438 532 579 611 700 808 911 968 991 1018 1085 1222 1509 1546 1593 1767 1782 2094 2100 2121 2140 2143 2228 2234 2331 2400 2404 2439 2574 2616 2636 2661 2741 2750 2836 2844 2867 3024 3128 3402 3712 3820 3882 3886 4096 4098 4134 4160 4200 4255 4260-4261 4352 4407 4472 4475 4497 4543 4550 4572 4587 4601 4606 4617 4685 4695 4705 4750 4805 4817 4820 4841 4848 4863 4865-4866 4880 4918 4940 4974 4992 5009 5049 5072 5091 5098 5125 5139 5154 5156 5162 5195 5201 5212 5250 5268 5270 5284 5306 5311 5314 5352-5354 5361 5370-5371 5390 5404 5423 5432 5448 5450 5455 5458 5460 5462 5483 5491 5516 5521-5523 5536 5546 5553 5589 5597 5616 5693 5723 5728 5771 5775-5776 5784 5795 5803 5817 5838 5848 5860 5870 5878 5891 5918 5939 5986 5990 5998-5999 6015 6018 6025 6039 6062 6088 6096 6101 6104 6110 6124 6132 6164 6167 6212 6219 6231 6255 6268 6292 6368 6406 6427 6436 6448 6458 6496 6498 6501-6502 6504 6507 6515 6548 6559 6601 6636 6641 6647 6764 6777 6948 6976 6984 7004 7028 7045 7131 7176 7180-7181 7200 7220 7233 7235 7245 7248 7262 7265 7269 7285 7296 7301 7305 7310 7315 7336 7346 7354 7378 7380 7389 7411 7426 7446 7448 7475 7478 7507 7518 7530 7553 7569-7570 7653 7709 7911 7951 7969 8004 8031 8057 8067 8203 8290 8299 8321 8339 8374 8432 8439-8440 8466 8487 8502 8510 8577 8595 8615 8645 8657 8699 8729 8746 8751 8762 8773 8805 8830 8858 8972 9003 9073 9075 9188 9196 9202 9204 9284 9301-9302 9310 9334 9338 9344 9353 9435 9442 9445 9460 9477 9545 9612 9615 9629 9632-9633 9641 9655 9676 9723 9762 9805 9811 9813 9823 9853 9855 9879 9892-9893 9906 9912 9957 9960 9965 9991-9992 9996 9998 10030 10033 10074 10119 10123 10154 10157 10163 10213 10216 10244 10249-10250 10255 10258 10280 10294 10319 10352 10422 10426-10427 10435 10442 10466 10474 10501 10512 10519 10522 10524 10526 10548 10551 10561 10572 10597 10605 10612 10627 10642 10653 10656 10669 10681 10695 10715 10756 10800-10801 10810 10818 10825 10852 10900 10910 10912 10921 10938 10949 10971 10975 10983 10994 10996 11004 11012 11027 11071 11081 11099-11100 11116 11124 11143 11177 11185 11195 11253 11268 11279 11290 11321 11323 11326 11352 11373-11374 11385 11396 11407 11430 11432 11443-11444 11449 11456 11461 11523 11536 11594 11631 11774 11777-11778 11787 11839 11876 11912 11936 11945 12164 12173 12352 12386 12466 12473 12475 12544 12599 12604 12625 12687 12842 13156 13320 13352-13353 13410 13485 13572 13582 13693 13729 13927 14068 14641 14842 14854 14916 15014 15023 15147 15286 15494 15947 15951 16027 16059 16247 16298 16532 16661 16676 16720 16774 16971 17184 17186 17215 17236 17326 17351 17364 17366 17401 17414 17494 17516 17541 17574 17602 17665 17701 17711 17732 17745 17791 17812 17819 17857 17909-17910 17927 17937 17944 17988 17999 18002 18005 18020 18022 18035 18053 18066 18070 18073 18084 18092 18096 18109 18119 18253 18280 18378 18402 18416 18506 18561 18624 18661 18668 18706 18755 18763 18766 18812 18821 18853 18950 19023 19034 19037 19042-19043 19056 19071 19088 19100 19105 19109 19157 19190 19202 19332 19372 19398 19405 19487 19500 19553 19593 19617 19622 19629 19694 19778 19851 19867 19878 19886 19910 19918 20006 20099 20146 20202 20213 20224 20290 20433 20468 20473 20476 20483 20610 20657 20693 20725 20735 20781 20888 21121 21142 21160 21188 21266 21358 21437 21781 21806 21855 21873 21879 21924 21935 21960 21968 21972 22047 22066 22271 22305 22388 22396 22501 22558 22658 22730 22799 22804 22917 22950 23014 23022 23099 23121 23215 23306 23364 23383 23416 23436 23691 23786 23882 23897 24084 24123 24333 24571 24608 24775 24845 24906 25082 25106 25196 25255 25302 25332 25501 25503 25549 25582 25630 25649 25677 25818 25835 25849 25864 25954 25990 26032 26036 26056 26073-26074 26083 26100 26131 26178 26228 26242 26274 26276 26292 26301 26303 26305 26308 26322 26340 26360 26363 26442 26470 26513 26543 26549 26565 26571 26614 26642 26858 26873 26898 26964 26983 26986 27032 27036 27056 27060 27063 27206 27289 27310 27322 27380 27413 27423 27433 27436 27472 27500 27509 27523-27524 27554 27579 27591 27672 27689 27716 27798 27805 27815 27846 27852 27857 27866 27926 27945 28042 28066 28083 28092 28167 28199 28225 28228 28268 28270-28271 28290 28318 28338-28339 28352 28370 28432 28446 28454 28463 28479 28492 28496 28498 28517 28542 28606 28618 28628-28629 28662 28664 28673 29570 29675 29772 30036 30039 30446 31190 31318 31334 31391 31407 31430 31451 31656 31664 31666 31757 31763 31844 31875 31894 31915 32614 32691 32808 32832 32841 33008 33195 33238 33382 33419 33430 33549 33560 33570 33611 33684 33774 33825 33827 33833 33881 33964 34012-34013 34038 34086 34095 34123 34210 34461 34517 34572 34637 34675 34699 34767 34870 34931 35079 35119 35141 35294 35370 35402 35535 35549 35680 35706 35801 35833 36090 36100 36133 36188 36346 36549 36551 36554 36665 36688 36708 36779 36795 36941 37190 37202 37385 37512 37519 37777 38046 38277 38355 38486 38579 38734 38763 38766 38802 38916 38954 39077 39542 40174 40265 40331 40344 40527 40762 40931 40949 41110 41335 41426 41460 41942 41988 42105 42609 42658 42822 42980 43246 43366 43451 43503 43978 43986 44043 44147 44658 44669 44730 44840 44908 45011 45081 45178 45262 45713 45843 45943 46204 46220 46251 46310 46373 46439 46445 46526 46569 46798 46835 46852 46887 46964-46965 47016 47057 47080 47106 47327 47375 47512 47534 47540 47605 47630 47649 47943 48023 48123 48300 48320 48362 48388 48589 48595 48685 48797-48798 48846 48995 49071https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/271/20?format=asciiGamma-rayOpticaldefaultJ/ApJS/271/20/table1The 979 Fermi blazarsSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintspDisplay the emission line fluxes of this source (link to Table 2)meta.ref.urlchar4FGL4FGL-DR4 catalog identifier (JHHMM.m+DDMM)meta.id;meta.maincharprimaryNameOther namemeta.idcharz[0.027/4.4] Spectroscopic redshiftsrc.redshiftfloatC14FGL-DR4 catalog classification (1)meta.code.class;src.classcharC2Yang+ 2022, J/ApJS/262/18 classificationmeta.code.class;src.classcharlognu[12.1/18.2]? Log peak frequency (2)log(Hz)em.freqfloatnullableF0.1-100[5e-13/7.4e-10] The 0.1-100GeV gamma-ray flux; erg/cm^2^/srmW.m**-2.sr**-1phot.flux;em.gamma.harddoublealpha[1.4/3.3] 4FGL-DR4 catalog photon spectral indexspect.indexfloatlogLg[42.8/48.9] Log 0.1-100GeV gamma-ray luminosity; erg/slog(1e-07W)phys.luminosity;em.gammafloatlogLBLR[40.4/46.7] Log Broad-Line Region luminosity; erg/slog(1e-07W)phys.luminosityfloatr_logLBLRReference code for logLBLR (3)meta.ref;phys.luminositychardelta[0.45/88.6] Doppler factor from this workarith.factorfloatDR3Display data from 4FGL-DR3 (IX/67)meta.ref.urlintnullableY22Display data from Yang+ 2022, J/ApJS/262/18meta.ref.urlintnullable_RAPositions from SIMBAD or from the 4FGL-DR4 (https://fermi.gsfc.nasa.gov/ssc/data/access/lat/14yr_catalog/gll_psc_v32.reg) (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD or from the 4FGL-DR4 (https://fermi.gsfc.nasa.gov/ssc/data/access/lat/14yr_catalog/gll_psc_v32.reg) (declination part)degpos.eq.dec;meta.mainJ/ApJS/271/20/table2The 278 Fermi blazars whose optical spectra exhibit at least one of the broad emission lines H{alpha}, H{beta}, MgII, and CIV4FGL4FGL-DR4 catalog identifier (JHHMM.m+DDMM)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintz[0.04/4.1] Spectroscopic redshiftsrc.redshiftfloatClassClassification (1)meta.code.class;src.classcharFHa[8.7/62567]? Halpha emission line flux; 1e-17erg/s/cm^2^1e-20W.m**-2phot.flux;em.line.Halphadoublenullablee_FHa[0/543]? Uncertainty in FHa1e-20W.m**-2stat.error;phot.flux;em.line.HalphafloatnullableFHb[4.9/19028]? Hbeta emission line flux; 1e-17erg/s/cm^2^1e-20W.m**-2phot.flux;em.line.Hbetadoublenullablee_FHb[3.8/1455]? Uncertainty in FHb1e-20W.m**-2stat.error;phot.flux;em.line.HbetafloatnullableFMgII[8.2/1745]? MgII emission line flux; 1e-17erg/s/cm^2^1e-20W.m**-2phot.flux;em.linefloatnullablee_FMgII[4.9/153]? Uncertainty in FMgII1e-20W.m**-2stat.error;phot.flux;em.linefloatnullableFCIV[7.6/4074]? CIV emission line flux; 1e-17erg/s/cm^2^1e-20W.m**-2phot.flux;em.linefloatnullablee_FCIV[5.7/1416]? Uncertainty in FCIV1e-20W.m**-2stat.error;phot.flux;em.linefloatnullablelogLBLR[40.44/45.45] Log Broad-line region luminosity; erg/slog(1e-07W)phys.luminosityfloate_logLBLR[0/0.5] Uncertainty in logLBLRlog(1e-07W)stat.error;phys.luminosityfloat