J/AcA/64/197ivo://CDS.VizieR/J/AcA/64/197doi:10.26093/cds/vizier.120640197CDSWyrzykowski L.Kostrzewa-rutkowska Z.Kozlowski S.Udalski A.,Poleski R.Skowron J.Blagorodnova N.Kubiak M.Szymanski M.K.,Pietrzynski G.Soszynski I.Ulaczyk K.Pietrukowicz P.Mroz P.2025-09-25T20:16:07Z2016-06-17T15:12:29ZCDS support team

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

cds-question@unistra.frsupernovaenovaeWe present the design and first results of a real-time search for transients within the 650 sq. deg. area around the Magellanic Clouds, conducted as part of the OGLE-IV project and aimed at detecting supernovae, novae and other events. The average sampling of about four days from September to May, yielded a detection of 238 transients in 2012/2013 and 2013/2014 seasons. The superb photometric and astrometric quality of the OGLE data allows for numerous applications of the discovered transients. We use this sample to prepare and train a Machine Learning-based automated classifier for early light curves, which distinguishes major classes of transients with more than 80% of correct answers. Spectroscopically classified 49 supernovae Type Ia are used to construct a Hubble Diagram with statistical scatter of about 0.3mag and fill the least populated region of the redshifts range in the Union sample. We investigate the influence of host galaxy environments on supernovae statistics and find the mean host extinction of A_I_=0.19+/-0.10mag and A_V_=0.39+/-0.21mag based on a subsample of supernovae Type Ia. We show that the positional accuracy of the survey is of the order of 0.5pixels (0.13") and that the OGLE-IV Transient Detection System is capable of detecting transients within the nuclei of galaxies. We present a few interesting cases of nuclear transients of unknown type. All data on the OGLE transients are made publicly available to the astronomical community via the OGLE website.2014AcA....64..197Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AcA/64/197CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://ogle.astrouw.edu.pl/ogle4/transients : updated transient databasehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AcA/64/197https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AcA/64/197http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AcA/64/197https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AcA/64/197https://vizier.iucaa.in/viz-bin/votable?-source=J/AcA/64/197http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AcA/64/197GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AcA/64/197/table1 (*Information on all OGLE-IV transients found by the Transients Detection System in real-time over the period of two seasons 2012/2013 and 2013/2014, with their basic information)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AcA/64/197/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AcA/64/197/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AcA/64/197/table1?GETtext/xml+votable180.050000true8.2294167-74.33880560.0055555555555555565/8275 8456 6/28914 32831 32861 32879 32887 32889 32910 32917 32921 32925 32943 32948-32949 32955 32957 32960-32961 32964-32965 32970-32972 32975-32976 32978-32979 32981 32984-32986 32990 32996-32997 32999-33000 33004 33008 33010-33011 33014 33020 33023 33026-33027 33034-33036 33040-33041 33047-33048 33053 33059 33066 33069 33075 33081 33083 33085-33087 33090 33093 33095 33097 33104-33105 33107-33108 33110-33111 33113-33114 33116 33118 33121-33122 33127 33130-33131 33136 33142 33144-33146 33152 33158 33163 33180 33194 33208 33217 33219 33223-33224 33226 33280 33291 33294 33297 33305 33315 33323 33326 33333 33335 33337-33338 33341-33342 33345 33355 33359 33377 33379 33383 33385-33386 33393 33408-33409 33417 33422 33424-33425 33427 33433-33434 33437-33438 33446 33449 33451 33455-33458 33461 33464-33465 33544 33792 33795 33797 33806 33808 33811 33814 33817-33819 33828 33831 33888 33893 33896 33904 34083 34821 34825 34828 37034 37098 37377 37380 37382 37386 37398 37402 37404-37405 37409 37416 37422-37423 37427 37430 37441 37445 37505 37507 37510 37514 37518 37537 37545 38915 38921 45137 45141-45142 45149 45320 45394-45395 46082-460832.367228618189496e-19 2.6706780932288093e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AcA/64/197?format=asciidefaultJ/AcA/64/197/table1*Information on all OGLE-IV transients found by the Transients Detection System in real-time over the period of two seasons 2012/2013 and 2013/2014, with their basic informationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the transient (YY-SN-NNN or YY-NOVA-NN)meta.id;meta.maincharDBIDInternal OGLE-IV database ID in format field.chip.star numbermeta.idcharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainDiscDateDiscovery date (HJD-2450000)dtime.epochdoubleImagDiscovery magnitude in I bandmagphot.mag;em.opt.IfloatATEL? ATel number for discoverymeta.bibintnullablepClassPhotometric classification with the highest probabilitymeta.note;photcharProb? Photometric classification probabilitymeta.code.class;stat.probabilityfloatnullableSpTypeSpectral type of the transient from the follow-up observationssrc.spTypecharz? Redshift from spectroscopic classification or found in NED for the nearest galaxysrc.redshiftdoublenullableSpNo? Atel or CBet number for the spectroscopic classification or "NED" if NED redshift available onlymeta.bibcharOffset? Offset in arcsec from the nucleus of the hostarcsecpos.angDistancefloatnullablen_Offset[)] ) when offset from the nearest galaxy found in NEDmeta.notecharOffsetk? Offset from the host's center in kpc if redshift availablekpcpos.angDistancefloatnullableOffset*? Offset from the nucleus in units of half-light radius RSerpos.angDistancefloatnullableRSer? Half-light radius of the host obtained in GALFIT modelarcsecstat.fit.paramfloatnullableWISEClassification of the nearest galaxy using WISE colors (1)meta.code.classcharComComment with visual classification type based on the entire light curvemeta.note;pos.cartesian.ycharSimbadSimbad column added by the CDSmeta.ref.urlchar