J/ApJS/141/31ivo://CDS.VizieR/J/ApJS/141/31doi:10.26093/cds/vizier.21410031CDSEnya K.Yoshii Y.Kobayashi Y.Minezaki T.Suganuma M.Tomita H.,Peterson B.A.2003-08-08T20:58:25Z2003-08-08T20:58:12ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiquasarsinfrared-photometryObservations of 226 AGNs in the near-infrared J, H, and K' bands are presented along with the analysis of the observations for variability. Our sample consists mainly of Seyfert 1 AGNs and QSOs. About a quarter of the objects in each category are radio loud. The AGNs in the entire sample have the redshifts spanning the range from z=0 to 1, and the absolute magnitudes from M_B_=-29 to -18. All the objects were observed twice, and their variability was measured by differential photometry. A reduction method of differential photometry, optimized to the analysis of extended images, has been developed. The systematic error in variability arising from AGNs of highly extended images is estimated to be less than 0.01mag in each of the J, H, and K' bands. The systematic error arising from the flat-fielding is negligible for most AGNs, although it is more than 0.1mag for some particular cases. The overall average flat-fielding error is 0.03mag for the image pairs. We find that these systematic errors are superseded by statistical errors, and the overall average total systematic and statistical errors amounts to 0.05mag in the measured variability in each band.2002ApJS..141...31Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/141/31CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/224 : Quasars and Active Galactic Nuclei (10th Ed.) (Veron+ 2001)J/ApJS/141/23 : JHK' imaging photometry of Seyfert 1. I. (Enya+, 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/141/31https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/141/31http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/141/31https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/141/31https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/141/31http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/141/31GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/141/31/table1 (Variability data of 226 AGNs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/141/31/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/141/31/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/141/31/table1?GETtext/xml+votable180.050000true0.050.040.0055555555555555566/0 5 110 214 513 601 893 1405 1521 2074 2134 2501 4118 4215 4338 4341 4369 4488 4506 4511 4691 4693 4767 4812 4820 4821 4835 4923 4965 4990 4992 5014 5034 5065 5091 5117 5154 5202 5274 5305 5306 5333 5355 5395 5437 5613 5665 5691 5731 5767 5791 5804 5825 5831 5838 5853 5857 5861 5862 6209 6212 6252 6264 6267 6270 6379 6405 6490 6493 6495 6508 6511 6515 6535 6618 6923 7176 7182 8261 8299 8305 8645 8812 8845 8893 8906 8912 8922 8927 8941 8952 8963 9018 9025 9051 9099 9194 9245 9512 10265 10269 10321 10340 10372 10394 10433 10472 10501 10578 10691 10694 10707 10761 10863 11392 11723 17523 17713 17730 17741 17746 17779 17799 17814 17834 17866 17896 17898 17979 18090 18096 18098 18774 18775 18895 21935 21996 22396 22452 22708 22740 22754 22847 22890 22962 22976 23017 23121 23248 23269 23323 23469 23802 23883 24116 24120 24349 25807 25939 25965 26019 26204 26251 26254 26292 26499 26513 26808 26859 26902 27023 27025 27039 27227 27249 27293 27349 27458 27484 27486 27580 27727 27736 27807 27862 27949 27954 27964 28033 28060 28159 28164 28216 28278 28315 28356 28383 28471 28508 28593 28605 28609 28654 31407 31414 32344 32384 36862 36863 44924https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/141/31?format=asciiInfrareddefaultJ/ApJS/141/31/table1Variability data of 226 AGNsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNumTarget AGN numbermeta.idintNameAGN namemeta.id;meta.mainchardJmag? J band differential photometry variabilitymagphot.mag;arith.difffloatnullablee_dJmag? The error in dJmagmagstat.errorfloatnullableo_dJmag? Number of reference objects used in dJmagmeta.numberintnullabledHmag? H band differential photometry variabilitymagphot.mag;arith.difffloatnullablee_dHmag? The error in dHmagmagstat.errorfloatnullableo_dHmag? Number of reference objects used in dHmagmeta.numberintnullabledK'mag? K' band differential photometry variabilitymagphot.mag;arith.difffloatnullablee_dK'mag? The error in dK'magmagstat.errorfloatnullableo_dK'mag? Number of reference objects used in dK'magmeta.numberintnullableObs1Date of first observationtime.epochnullableObs2Date of second observationtime.epochnullable_RAPosition from PaperI (J/ApJS/141/23) (right ascension part)degpos.eq.ra;meta.main_DEPosition from PaperI (J/ApJS/141/23) (declination part)degpos.eq.dec;meta.main