J/MNRAS/503/2583ivo://CDS.VizieR/J/MNRAS/503/2583doi:10.26093/cds/vizier.75032583CDSSenarath M.R.Brown M.J.I.Cluver M.E.Jarrett T.H.Wolf C.Ross N.P.,Lucey J.R.Parkash V.Hon W.J.2024-11-06T20:33:19Z2024-03-04T15:55:00ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiphotometryvisible-astronomyredshiftedWe have conducted a systematic survey for z<0.04 active Galactic nuclei (AGNs) that may have changed spectral class over the past decade. We use SkyMapper, Pan-STARRS and the Veron-Cetty & Veron catalogue to search the entire sky for these 'changing-look' AGNs (CLAGNs) using a variety of selection methods, where Pan-STARRS has a coverage of 3{pi} steradians (sky north of Declination -30{deg}) and SkyMapper has coverage of ~21000~deg^2^ (sky south of Declination 0{deg}). We use small aperture photometry to measure how colour and flux have changed over time, where a change may indicate a change in spectral type. Optical colour and flux are used as a proxy for changing H{alpha} equivalent width, while WISE 3.4{mu}m flux is used to look for changes in the hot dust component. We have identified four AGNs with varying spectra selected using our optical colour selection method. Three AGNs were confirmed from recent observations with WiFeS on the 2.3m telescope at Siding Spring and the other was identified from archival spectra alone. From this, we identify two new CLAGNs; NGC 1346 and 2MASX J20075129-1108346. We also recover Mrk 915 and Mrk 609, which are known to have varying spectra in the literature, but they do not meet our specific criteria for CLAGNs.2021MNRAS.503.2583Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/503/2583CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)II/358 : SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/503/2583https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/503/2583http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/503/2583https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/503/2583https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/503/2583http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/503/2583GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/503/2583/table2 (SkyMapper catalogue used to select CLAGN candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/503/2583/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/503/2583/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/503/2583/table2?GETtext/xml+votable180.050000true0.88389-10.74460.005555555555555556Cone search capability for table J/MNRAS/503/2583/table3 (Pan-STARRS (PS1) catalogue used to select CLAGN candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/503/2583/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/503/2583/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/503/2583/table3?GETtext/xml+votable180.050000true0.4933333436.648888890.0055555555555555566/18 134-135 149 243 361 595 650 698 745 941 953 995 1000 1008 1121 1277 1405 1476 1701-1702 1918 2142 2216 2221 2229 2248 2251 2266 2358 2372 2433 2564 2709 2774 3556 4215 4369 4439 4447 4488 4535 4540 4558 4654 4804 4834 4992 5007 5033 5061 5183 5202 5394-5395 5423 5463 5514 5564 5671 5793 5970 5975 6212 6241 6342 6353 6376 6438 6458 6638 6752 6779 6935 6958 6977 7132 7157 7221 7265 7288 7308 7313 7355 7370 7374 7424 7485 7523 7529 7550 7552 7575 7628 7642 7659 7682 7696 7713 7728 7741 7869 7921 7947 7957 8029 8195 8215-8216 8261 8264 8270 8299 8384 8486 8492 8506 8654 8922 8947 8950 8992 9051 9151 9231 9287 9449 9468 9502 9509 9520 9532 9605 9607 9633 9750 9826 9868 9990-9991 10052 10106 10141 10166 10190 10193 10200 10207 10232 10358 10364 10366 10404 10454 10475 10485 10501 10553 10560 10628 10662 10666 10788 10813 10847 10858 10912 10924-10925 10927 10936 10950 10977 10984 10995 11027 11029 11090 11101 11310 11443 11490 11636 11653 11712 11832 11886 11898 12060 12074 12201 12241 12297 12306 12457 12481 13021 13423 13511 13541 13720 13832 14960 15071 15231 15825 15955 16042 16091 16533 16690 16748 16765 16784 16800 16835 16877 16936 17061 17111 17134 17183 17213 17392 17406 17492 17525 17582 17629 17659 17727 17748 17754 17767 17778-17779 17795 17850 17911 18008 18055 18070 18185 18246 18299 18484 18507 18562 18592 18606 18714 18742 18749 18762 18794 18838-18839 18897 18912 19022 19130 19157 19261 19283 19296 19318 19360 19373 19376 19400 19456 19469 19513 19611 19618-19619 19694 19738 19741 19797 19883 19983-19984 20000 20005 20189 20192 20206 20208 20230 20325 20355 20373 20387 20465 20489 20496 20556 20750 20840 20867 21245 21372 21450 21785 21824 21996 22365 22553 22626 22632 22638 22654 22890 22912 22915 22920 22945 22975 23010 23017 23035 23046 23074-23075 23086 23160 23171 23205 23213 23233 23323 23385 23469 24123 24228 24631 24699 24748 24750 24842 24896 24916 25035 25051 25053-25054 25090 25182 25248 25476 25497 25518 25572 25585 25610 25661 25742 25782 25790 25838 25890 25907 25945 25950 25967 25981 25992 26041 26060 26071 26121 26128 26148 26161 26181 26191 26223 26236 26241 26264 26303 26344 26346 26365 26372 26375 26388 26393 26547 26624 26743 26835 26854 26860 26899 26910 26920 26975 26978 27061 27102 27143 27186 27191 27239 27259 27332 27414 27422 27464 27477 27481 27699 27704 27719 27721-27722 27736 27767 27773 27803 27857 27880 27918 27936 27938 27945 28075 28123 28141 28221 28275 28416 28458 28515 28517 28535 28593 28609 28639 28653 29346 29795 29906 30021 30027 30044 30822 30928 31080 31101 31120 31259 31288 31350 31406 31430 31509 31676 32005 32340 32986 33034 33558 33958 34100 34142 34290 34294 34534 34558 34695 34845 35021 35067 35263 35284 35537 35608 35613 35623 35717 35719 35744 35850 35899 35987 36020 36023 36062 36081 36158 36171 36198 36207 36216 36316 36457 36618-36619 36647 36660 36668 36671 36716 36718 36733 36763 36765 36775 36785 36861 37439 38129 38159 38268 38479 38653 38696 38704 38817 38868 38887 39028 39050 39182 39322 39467 39717 39836 39942 40221 40250 40258 40410 40747 40818 41435 41442 42012 42683 42852 43107 43339 43520 43634 43677 43745 43748 43825 43877 43925 43940 43971 43983 43996 44017 44028 44041 44043 44122 44267 44439 44507 44551 44578 44660 44698 44722 44757 44896 45220 45399 45446 45711 45735 45754 45779 45883 45997 46040 46078 46399 46481 46544 46709 46715 46740 46811 46831 46890 47027 47047 47064 47093 47120 47154 47169 47245 47260 47415 47543 47946 48233 48290 48293 48395 48516 48605 48798 48891 49001 490422.040811542443644e-19 3.5010283109654867e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/503/2583?format=asciiOpticaldefaultJ/MNRAS/503/2583/table2SkyMapper catalogue used to select CLAGN candidatesSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainNameNamemeta.id;meta.maincharzRedshiftsrc.redshiftfloatSpTypeVCV spectral typesrc.spTypefloatrmagSMSkyMapper r magnitude (mag_apc05_r)magphot.mag;em.opt.RfloatimagSMSkyMapper i magnitude (mag_apc05_i)magphot.mag;em.opt.IfloatzmagSMSkyMapper z magnitude (mag_apc05_z)magphot.mag;em.opt.IfloatSDSS-mjd? SDSS MJDtime.epochintnullablermagSDSS? SDSS r magnitude (fib_r)magphot.mag;em.opt.RdoublenullableimagSDSS? SDSS i magnitude (fib_i)magphot.mag;em.opt.IdoublenullablezmagSDSS? SDSS z magnitude (fib_z)magphot.mag;em.opt.IdoublenullablePan3-mjd? Pan-STARRS MJD (1)time.epochdoublenullablermagP? Pan-STARRS r magnitude (Pan_3r) (1)magphot.mag;em.opt.RdoublenullableimagP? Pan-STARRS i magnitude (Pan_3i) (1)magphot.mag;em.opt.IdoublenullablezmagP? Pan-STARRS z magnitude (Pan_3z) (1)magphot.mag;em.opt.IdoublenullableFlag[0/2] Optical colour selection flag (2)meta.code.errorintSpNotes[0/5] CLAGN spectra flag (3)meta.codeintSpSourcesSpectral reference (4)meta.bibcharJ/MNRAS/503/2583/table3Pan-STARRS (PS1) catalogue used to select CLAGN candidatesSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainNameNamemeta.id;meta.maincharzRedshiftsrc.redshiftfloatSpTypeVCV spectral typesrc.spTypefloatrmagPPan-STARRS r magnitude (mag_r)magphot.mag;em.opt.RfloatimagPPan-STARRS i magnitude (mag_i)magphot.mag;em.opt.IfloatzmagPPan-STARRS z magnitude (mag_z)magphot.mag;em.opt.IfloatSDSS-mjd? SDSS MJDtime.epochintnullablermagSDSS? SDSS r magnitude (fib_r)magphot.mag;em.opt.RdoublenullableimagSDSS? SDSS i magnitude (fib_i)magphot.mag;em.opt.IdoublenullablezmagSDSS? SDSS z magnitude (fib_z)magphot.mag;em.opt.IdoublenullableFlag[0/2] Optical colour selection flag (2)meta.code.errorintSpNotes[0/5] CLAGN spectra flag (3)meta.codeintSpSourcesSpectral reference (4)meta.bibchar