J/A+A/559/A20ivo://CDS.VizieR/J/A+A/559/A20doi:10.26093/cds/vizier.35590020CDSHudec R.Basta M.Pihajoki P.Valtonen M.2017-07-03T14:25:42Z2013-10-30T06:32:52ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsphotometryWe report on historical optical outbursts in the OJ287 system in 1900 and 1913, detected on archival astronomical plates of the Harvard College Observatory. The 1900 outburst is reported for the first time. The first recorded outburst of the periodically active quasar OJ287 described before was observed in 1913. Up to now the information on this event was based on three points from plate archives. We used the Harvard plate collection, and added another seven observations to the light curve. The light curve is now well covered and allows one to determine the beginning of the outburst quite accurately. The outburst was longer and more energetic than the standard 1983 outburst. Should the system be strictly periodic, the period determined from these two outbursts would be 11.665yr. However, this does not match the 1900 outburst or other prominent outbursts in the record. On the other hand, the precessing binary black hole model of Lehto and Valtonen (1996ApJ...460..207L) can explain these and other known outbursts in OJ287. Finally, we discuss the upper limits for the expected 1906 outburst and the 1910 outburst, which was observed.2013A&A...559A..20Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/559/A20CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/129/569 : BVRI photometry of OJ 287 (Jia Guibin+ 1998)J/AJ/132/1256 : eim BATC photometry of OJ 287 (Wu+, 2006)J/AJ/141/65 : BATC ceimo light curves of OJ 287 (Dai+, 2011)J/MNRAS/385/823 : UBVRI light curves of OJ 287 (Zheng+, 2008)J/MNRAS/402/2087 : Optical polarization of OJ 287 in 2005-09 (Villforth+, 2010)J/MNRAS/421/1861 : OJ 287 polarization and VLBI jet direction (Valtonen+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/559/A20https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/559/A20http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/559/A20https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/559/A20https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/559/A20http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/559/A20GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/559/A20/table2Magnitude estimates from HCO sky patrol platesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian datedtime.epochdoubleQualPlate quality (1)meta.code.qual;instr.platecharl_BmagLimit flag on Bmagmeta.code.errorcharBmag? B-band magnitudemagphot.mag;em.opt.Bfloatnullable