J/AN/340/437ivo://CDS.VizieR/J/AN/340/437doi:10.26093/cds/vizier.113400437CDSAbrahamyan H. V.Mickaelian A. M.Paronyan G. M.Mikayelyan G. A.2025-09-29T20:18:10Z2019-07-23T07:12:26ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsquasarsphotometryvisible-astronomyredshiftedradio-sourcesThe analysis of blazars' parameters from BZCAT leads to a conclusion that they do not have the same properties. The preliminary criterion to include an object in the catalog was the strong radio emission; however, two type of radio sources were selected: BL Lacertae (BLL) objects and Flat Spectrum Radio Quasars (FSRQ). As a number of properties are typical of blazars (strong radio emission, optical variability, continuum optical spectra, polarization, high luminosity, etc.), using the optical data, we investigate them to clarify which property plays the most significant role in their classification as blazars. We found that 60% of blazars have optical variability. We use a technique developed based on POSS1 and POSS2 photometry and group the variability into extreme, strong, medium, and low classes. In the optical range, 51 blazars have powerful variability (extreme variables), and 126 are high variables. In addition, 63% of blazars have detected radiation in X-ray and 28% have detected radiation in gamma rays. We give the average statistical characteristics of blazars based on our analysis and calculations.2019AN....340..437Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AN/340/437CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/252 : The USNO-A2.0 Catalogue (Monet+ 1998)I/267 : The APM-North Catalogue (McMahon+, 2000)I/284 : The USNO-B1.0 Catalog (Monet+ 2003)I/305 : The Guide Star Catalog, Version 2.3.2 (GSC2.3) (STScI, 2006)VII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010)VII/273 : The Half Million Quasars (HMQ) catalogue (Flesch, 2015)VII/274 : The Roma BZCAT - 5th edition (Massaro+, 2015)J/A+A/296/665 : Survey of optically variables QSOs (Veron+, 1995)J/A+A/353/77 : Var. + polarization of luminous quasars (Teerikorpi+, 2000)J/ApJ/607/665 : Type Ia supernovae at z>1 discovered by HST (Riess+, 2004)J/AJ/135/1384 : R-band variability in 5 blazars (Gupta+, 2008)J/MNRAS/407/681 : PMs of FBS blue stellar objects (Mickaelian+, 2010)J/MNRAS/415/1061 : Variability of FBS blue stellar objects (Mickaelian+ 2011)J/A+A/529/A91 : Proper motions of 555 quasars from VLBI (Titov+, 2011)J/A+A/562/A79 : Variability of 7 blazars in six bands (Sandrinelli+, 2014)J/MNRAS/439/690 : Optical/{gamma}-ray variability in blazars (Hovatta+, 2014)J/A+A/624/A145 : Astrometric Catalogue 5, LQAC-5 (Souchay+, 2019)J/other/A+C/25.176 : NVSS and FIRST variable sources (Abrahamyan+, 2018)J/other/RAA/19.29 : Compilation of known QSOs for Gaia mission (Liao+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AN/340/437https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AN/340/437http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AN/340/437https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AN/340/437https://vizier.iucaa.in/viz-bin/votable?-source=J/AN/340/437http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AN/340/437GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AN/340/437/table8 (Variable blazars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AN/340/437/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/AN/340/437/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AN/340/437/table8?GETtext/xml+votable180.050000true0.27208-15.851940.0055555555555555566/1 29 60 70 172 180 250 255 307 342 376 447 465 532 548 574 579 583 597 615 677 700 716 731 770 804 808 851 893 900 911 988 1019 1085 1120 1128 1154 1222 1225 1312 1419 1546 1576 1622 1699 1701-1702 1909 1915 1988 2087 2094 2098 2100 2104 2117 2122 2124 2158 2178-2179 2234 2249 2273 2295 2331 2334 2394 2397 2400 2404 2414 2441 2448 2470 2505 2549 2564 2628 2647 2650 2661 2671 2674 2708 2750 2792 2808 2836 2844 2867 2949 3004 3024 3096 3128 3402 3428 3431 3492 3569 3616 3629 3710 3712 3820 3882 3886 3951 4027 4054 4096 4098 4122 4134 4140 4143 4146 4167-4168 4190 4200 4210 4259-4261 4285 4312 4317 4350 4407 4409 4413 4435-4436 4472 4475 4477 4499 4543 4572 4594 4617 4627 4634 4641 4672 4683-4685 4695-4696 4705 4741 4746 4748 4750 4770 4792 4795 4798 4801 4805 4820 4841 4861-4863 4866 4880 4882 4914 4923 4925 4928 4940 4960 4963-4964 4968 4974 4992 5009 5053 5072 5091 5107 5119 5125 5139 5154 5156 5162 5191-5192 5200-5201 5268 5270 5284 5312 5345 5352 5361 5364 5371 5404 5413 5423 5432 5460 5462-5463 5470 5521 5523 5529 5535-5536 5546 5552-5553 5569 5589 5592 5614 5630 5637 5652 5673 5676-5677 5693 5698 5717 5723 5747 5749 5767 5773 5775 5784 5792 5800-5801 5806 5814 5817 5831 5841 5844 5864 5867 5878 5881 5906 5918 5929 5958 5960 5980 5985 5988 5999 6004 6013-6015 6021 6025 6037 6062 6067 6088 6096 6104 6121 6153 6164 6170 6174 6204 6223 6243 6246 6255 6267-6268 6292 6340 6348 6362 6368 6377 6399 6406 6422 6427 6448 6457 6465 6468 6475 6477 6496 6498-6499 6501-6502 6504 6507 6519 6526 6531 6534 6540 6548 6554 6559-6560 6601 6604 6607 6618-6620 6623 6629 6633 6636 6641 6647-6648 6686 6716 6747 6751 6764 6777 6790 6815 6822 6882 6888 6923 6962-6963 6976 6984 6996 7004 7037-7038 7045 7091 7106 7129 7148 7176 7190 7192 7204 7212 7233 7245 7257 7261-7262 7265-7266 7269 7274 7282 7285 7296 7311 7315-7317 7319 7336 7343 7345 7351 7371 7389 7401 7410 7423 7426 7433 7445-7446 7448 7452 7458 7472 7478 7507 7510 7518 7553 7564 7569 7576 7618 7623 7644 7653 7655 7710 7716 7758 7777 7808 7871 7891 8004 8008 8057 8067 8077 8106 8137 8143 8175 8197 8199 8207 8216 8220 8227 8253 8265 8275 8283 8290 8305 8321 8339 8374 8378 8452 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15059 15082 15091 15143 15147 15153 15211 15260 15311 15494-15495 15761 15819 15895 15935-15936 15947 15955 15973 15996 16015 16022 16027 16049 16057 16059 16093 16170 16185 16223 16272 16281 16298 16434 16444 16478 16504 16539 16562 16606 16614 16634 16661 16665 16672 16679 16698 16720 16736 16796 16816 16891 16962 16971 17019 17048 17110 17146 17148 17159 17161 17165 17168 17184 17186 17188 17193 17206 17212 17215 17236 17238 17264 17300 17317 17326 17347 17351 17364 17366 17377 17388 17401 17471-17472 17519 17537 17541 17551 17574 17588 17602 17611 17617-17618 17642 17657 17665 17693 17734 17745 17755 17775 17785 17812 17824 17842-17843 17909 17927 17937 17944 17965 17979 17994 17997 18022 18037 18084 18090 18092 18219 18253 18271 18388 18402 18407 18409 18438 18443 18457 18480 18491 18498 18506 18517 18545 18548 18561 18624 18627 18641 18669 18706 18718 18763 18795 18852 18854 18868 18871 18889 18957 18992 19007 19033-19034 19037 19085 19088 19101 19104 19109 19143 19157 19178 19190 19200 19202 19217 19225 19253 19281 19308 19324 19326-19327 19344 19372 19398 19405 19487 19493 19553 19566-19567 19593 19618 19629 19723-19724 19743 19762 19789 19803 19831 19860 19882-19883 19886 19890 19907 19910 19914 19918 19930 19946 19970 19983 19989 19996 19999 20006 20016 20034 20099 20141 20144 20146 20156-20157 20195 20202 20213 20290 20292 20304 20325 20377 20395 20433 20460 20474 20476 20478 20483 20546 20550 20577 20607 20610 20624 20657 20696 20764 20768 20770 20783 20836 20873 20881 20908 20912 20920 20929 20969 20974 21049 21060 21078 21117 21131 21163 21170 21196 21266 21298 21458 21554 21574 21704 21758 21763 21768 21885-21886 21903 21924 21935 21960 21968 22015 22184 22298 22305 22363-22364 22372 22396 22501 22558 22563 22608 22621 22658-22659 22703 22713 22722 22724 22730 22768 22804 22823 22828 22856-22857 22894 22914 22917 22947 22950 22978 23014-23016 23022 23030 23085 23099 23103 23105 23121 23131 23181 23261 23323-23324 23335-23336 23383 23416 23436 23478 23548 23691 23835 23932 23948 24019 24027 24084 24099-24100 24112 24333 24415 24444 24566 24608 24635 24658 24661 24724 24734 24744 24814 24828 24854 24870 24902 24931 24941 25033 25061 25082 25094 25097 25108 25126 25131 25174 25196 25203 25209 25225 25255-25256 25284 25299 25302 25332 25354 25389 25428 25501 25511 25542 25580 25582 25621 25630 25647 25649 25654 25673 25677-25678 25707 25750 25760 25835 25841 25849 25947-25948 25954 25983 25990-25991 26016 26035-26036 26056 26073 26083 26087 26089-26090 26100 26107 26119 26126 26131 26134 26203 26207 26225 26244-26245 26248 26254 26256 26259 26276-26277 26282-26283 26305 26322 26335 26340 26344 26360 26362 26406 26442-26443 26469 26483 26536 26539 26550 26565 26614 26624 26642 26672 26695-26696 26742 26806 26834 26859 26873 26885 26898 26901 26931 26939 26964 26975 27003 27032 27034 27060 27063 27076 27082 27095-27096 27101 27124 27133 27138 27145-27146 27212 27217 27232 27243 27247 27249 27263 27291 27302 27311 27321 27404-27405 27417 27423 27428 27447 27464 27466 27472 27520 27523-27524 27573 27595 27611-27612 27622 27631 27653 27669 27675 27711 27722 27750 27796-27797 27812 27845-27846 27851 27857 27926 27962 28001-28002 28037 28042 28066 28083 28115 28117 28138-28139 28217 28227 28243 28270-28271 28318 28343 28352 28370 28388 28401 28408 28454 28471 28476 28478-28479 28481 28495 28498 28517 28521 28546 28561 28589 28595 28606 28616 28628 28643 28647 28662 28664 28673 28736 28836 28999 29003 29072 29357 29570 29620 29675 29729 29754 29788 29795 29823 29915 29952 29974 29976 30012 30035 30039 30075 30112 30160 30195 30203 30379 30446 30518 30570 30573 30836 30842 30923 30928 30942 30954 31015 31079 31154 31190 31211 31243 31274 31276 31323 31355 31362 31391 31399 31407 31424 31430 31451 31454 31485 31529 31547 31566 31634 31663-31664 31666 31679 31741 31763 31773 31844 31857 31875 31894 31915 31930 32068 32160 32163 32247 32261 32325 32345 32370 32442 32497 32527 32546 32605 32611 32614 32687 32691 32712 32764 32808 32831-32832 32841 32867 32871 32874 32897 32902 32904 32910 32916 32961 32967-32968 32979 32994 33008 33011 33040 33057 33107 33137 33189 33195 33198 33237 33285 33356 33370 33378 33398 33412 33430 33460 33467 33489 33506 33549 33560 33570 33575 33583 33611 33634 33648 33656 33659 33665 33679 33684 33740 33744 33752 33774 33789 33795 33823 33827 33833 33862 33865 33880-33881 33898 33964 33967-33968 33973 34012 34026 34038 34041 34044 34046 34050 34086 34095 34097 34123 34128 34146 34163 34174 34209-34210 34233 34238 34264 34317 34371 34375 34398 34406 34417 34428 34437 34461 34489 34514 34520 34528 34531 34568 34570-34572 34637 34656 34665 34668 34699 34747 34771 34856 34871 34911 34931 34938 35074-35076 35079 35081-35082 35146 35199 35243 35252 35281 35301 35311 35318 35333 35342 35384 35402 35432 35457 35475 35484 35487 35501 35522 35532 35590 35624 35630 35651 35696 35704 35719-35720 35730 35758 35764 35769 35781 35790 35806 35817 35821 35849 35865 35897 35910 35943 35960 35963 35981 35993 36005 36033 36058 36090 36117 36138 36151 36176 36188 36211 36219 36278 36283 36333 36343 36432 36505 36520 36548-36549 36551 36554 36596 36602 36609 36640 36665 36688 36708 36735 36754 36769-36770 36778-36780 36818 36840 36863 36882 36916 36941 36972 36988 37032 37045 37190 37203 37385 37469 37480 37512 37627 37686 37777 38128 38141 38189 38199 38277 38296 38303 38310 38350 38355 38397 38474 38477 38481 38502 38519 38638-38639 38663 38677 38715 38734 38740 38744 38763 38766 38772 38787 38791 38797 38802 38918 38930 38939 38942 38953 38993 39004 39077 39085 39088 39129 39131 39298 39466 39489 39505 39522 39566 39592 39622 39664 39740 39866 39978 40060 40131 40141 40174 40217 40247 40265 40339 40351 40353 40360 40412 40432 40434 40479 40514 40520 40533 40637 40642 40658 40689 40762 40795 40798 40809 40885 40891 40955 40959 40995 41033 41059 41073 41251 41262 41275 41356 41363 41942 41988 41991 42076 42188 42481 42515 42571 42609 42658 42670 42822 42901 43085 43122 43293 43337 43366 43380 43399 43421 43447 43483 43501 43530 43549 43578 43596-43597 43603 43628 43633 43679 43694 43715 43765 43812 43821-43822 43830 43837 43841 43850 43863 43865 43870 43883 43885 43908 43914-43916 43924-43925 43929 43936 43945 43980 43986 43996 44038 44067 44069 44075 44106 44113 44144 44147 44149 44166 44170 44173 44226 44260 44269 44293 44334 44340 44356 44449 44555 44563 44592 44597 44604 44624 44658 44661 44663 44669 44699 44705 44724 44729-44730 44774 44776 44799 44802 44805 44813 44820 44832 44840 44908 44944 45011 45038 45044 45081 45158-45159 45164 45178 45295 45303 45309 45409 45424 45453 45482 45558 45575 45580 45599 45614 45648 45655 45660 45713 45774 45795 45803 45846 45923 45999 46055 46123 46142 46146 46175 46204 46214 46226 46232 46246 46251 46258 46310 46337 46354 46369-46370 46374 46388 46439 46445 46459 46481 46490 46501 46510 46521 46529 46542 46545 46568 46577 46615 46629 46717 46721 46724 46736 46740 46764 46787 46798 46810 46851-46852 46868 46872 46887 46918 46921 46924 46931-46932 46948 46950 46964-46966 46969 47014 47016 47021 47050 47106-47107 47112 47141 47151 47154 47248 47255 47268 47327 47341 47353-47354 47375 47413 47512 47534 47540 47649 47656 47672 47708 47714 47747 47805 47847 47922 47960 47969 47972 48023 48108 48137 48187 48207 48238 48245 48284 48292 48300 48316 48352 48386 48388 48419 48423 48443 48582 48589 48595 48603 48639 48708 48757 48798 48878 48893 48926 48965 48975 48985 48989 48995 49019 49037 49069 49083-49084 49124 49141https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AN/340/437?format=asciiOpticalRadiodefaultJ/AN/340/437/table8Variable blazarsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (5BZQ, 5BZB, 5BZG or 5BZU JHHMM+DDMM)meta.id;meta.maincharRAJ2000BZCAT v5 right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000BZCAT v5 declination (J2000)degpos.eq.dec;meta.mainz[0.006/6.9]? Redshift from BZCAT v.5src.redshiftfloatnullableRmag[0/24.4]? R-band magnitude from BZCAT v.5magphot.mag;em.opt.RfloatnullableRMag[-28.3/-16]? R-band absolute magnitudemagphot.mag;em.opt.RfloatnullableLum[0.0008/66.3]? Luminosity in 10^45^erg/s1e+38Wphys.luminositydoublenullableB1best[8.5/22.4]? B1 Best magnitude (POSS1)magphot.mag;em.opt.Bfloatnullablee_B1best[0/1.3]? B1 Best magnitude errormagstat.errorfloatnullableR1best[7.4/20.9]? R1 Best magnitude (POSS1)magphot.mag;em.opt.Rfloatnullablee_R1best[0/1.1]? R1 Best magnitude errormagstat.errorfloatnullableB2best[8.7/22.2]? B2 Best magnitude (POSS2)magphot.mag;em.opt.Bfloatnullablee_B2best[0/1.5]? B2 Best magnitude errormagstat.errorfloatnullableR2best[7.6/23.7]? R2 Best magnitude (POSS2)magphot.mag;em.opt.Rfloatnullablee_R2best[0/1.3]? R2 Best magnitude errormagstat.errorfloatnullabledelB[-6.1/5.6]? {Delta}B value (=|B_POSS2_-B_POSS1_|-3{sigma}_B_)magphot.mag;arith.difffloatnullabledelR[-6.3/7]? {Delta}R value (=|R_POSS2_-R_POSS1_|-3{sigma}_R_)magphot.mag;arith.difffloatnullableBr[0/357]? B_r_=|B_POSS2_-B_POSS1_|/{sigma}_B_src.var.amplitudefloatnullableRr[0/563]? R_r_=|R_POSS2_-R_POSS1_|/{sigma}_R_src.var.amplitudefloatnullableVardB[0/3]? Variability category based on {Delta}B (1)meta.code;src.varintnullableVardR[0/3]? Variability category based on {Delta}R (1)meta.code;src.varintnullableVarBr[0/3]? Variability category based on B_r_ (1)meta.code;src.varintnullableVarRr[0/3]? Variability category based on R_r_ (1)meta.code;src.varintnullableUSNOB1Display the USNO-B1.0 data (I/284) within 1"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar