A Search for QPOs in the Blazar OJ287: Preliminary Results from the 2015/2016 Observing Campaign

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dc.contributor.authorZola S.
dc.contributor.authorValtonen M.
dc.contributor.authorBhatta G.
dc.contributor.authorGoyal A.
dc.contributor.authorDebski B.
dc.contributor.authorBaran A.
dc.contributor.authorKrzesinski J.
dc.contributor.authorSiwak M.
dc.contributor.authorCiprini S.
dc.contributor.authorGopakumar A.
dc.contributor.authorJermak H.
dc.contributor.authorNilsson K.
dc.contributor.authorReichart D.
dc.contributor.authorMatsumoto K.
dc.contributor.authorSadakane K.
dc.contributor.authorGazeas K.
dc.contributor.authorKidger M.
dc.contributor.authorPiirola V.
dc.contributor.authorAlicavus F.
dc.contributor.authorBaliyan K.
dc.contributor.authorBerdyugin A.
dc.contributor.authorBoyd D.
dc.contributor.authorCampas Torrent M.
dc.contributor.authorCampos F.
dc.contributor.authorCarrillo Gómez J.
dc.contributor.authorCaton D.
dc.contributor.authorChavushyan V.
dc.contributor.authorDalessio J.
dc.contributor.authorDimitrov D.
dc.contributor.authorDrozdz M.
dc.contributor.authorEr H.
dc.contributor.authorErdem A.
dc.contributor.authorEscartin Pérez A.
dc.contributor.authorFallah Ramazani V.
dc.contributor.authorFilippenko A.
dc.contributor.authorGarcia F.
dc.contributor.authorGómez Pinilla F.
dc.contributor.authorGopinathan M.
dc.contributor.authorHaislip J.
dc.contributor.authorHarmanen J.
dc.contributor.authorHudec R.
dc.contributor.authorHurst G.
dc.contributor.authorIvarsen K.
dc.contributor.authorJelinek M.
dc.contributor.authorJoshi A.
dc.contributor.authorKagitani M.
dc.contributor.authorKaur N.
dc.contributor.authorKeel W.
dc.contributor.authorLaCluyze A.
dc.contributor.authorLee B.
dc.contributor.authorLindfors E.
dc.contributor.authorLozano de Haro J.
dc.contributor.authorMoore J.
dc.contributor.authorMugrauer M.
dc.contributor.authorNaves Nogues R.
dc.contributor.authorNeely A.
dc.contributor.authorNelson R.
dc.contributor.authorOgloza W.
dc.contributor.authorOkano S.
dc.contributor.authorPandey J.
dc.contributor.authorPerri M.
dc.contributor.authorPihajoki P.
dc.contributor.authorPoyner G.
dc.contributor.authorProvencal J.
dc.contributor.authorPursimo T.
dc.contributor.authorRaj A.
dc.contributor.authorReinthal R.
dc.contributor.authorSadegi S.
dc.contributor.authorSakanoi T.
dc.contributor.authorSameer
dc.contributor.authorSalto González J.-L.
dc.contributor.authorSchweyer T.
dc.contributor.authorSoldán Alfaro F.
dc.contributor.authorKaraman N.
dc.contributor.authorSonbas E.
dc.contributor.authorSteele I.
dc.contributor.authorStocke J.
dc.contributor.authorStrobl J.
dc.contributor.authorTakalo L.
dc.contributor.authorTomov T.
dc.contributor.authorTremosa Espasa L.
dc.contributor.authorValdes J.
dc.contributor.authorValero Pérez J.
dc.contributor.authorVerrecchia F.
dc.contributor.authorWebb J.
dc.contributor.authorYoneda M.
dc.contributor.authorZejmo M.
dc.contributor.authorZheng W.
dc.contributor.authorTelting J.
dc.contributor.authorSaario J.
dc.contributor.authorReynolds T.
dc.contributor.authorKvammen A.
dc.contributor.authorGafton E.
dc.contributor.authorKarjalainen R.
dc.contributor.authorBlay P.
dc.contributor.organizationfi=Suomen ESO-keskus|en=Finnish Centre for Astronomy with ESO|
dc.contributor.organizationfi=Tuorlan observatorio|en=Tuorla Observatory|
dc.contributor.organizationfi=fysiikan ja tähtitieteen laitos|en=Department of Physics and Astronomy|
dc.contributor.organization-code1.2.246.10.2458963.20.54954054844
dc.contributor.organization-code1.2.246.10.2458963.20.90670098848
dc.contributor.organization-code2606700
dc.contributor.organization-code2606705
dc.converis.publication-id17955086
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/17955086
dc.date.accessioned2022-10-28T14:32:09Z
dc.date.available2022-10-28T14:32:09Z
dc.description.abstractWe analyse the light curve in the <i>R</i> band of the blazar OJ287, gathered during the 2015/2016 observing season. We did a search for quasi-periodic oscillations (QPOs) using several methods over a wide range of timescales. No statistically significant periods were found in the high-frequency domain both in the ground-based data and in <i>Kepler</i> observations. In the longer-period domain, the Lomb–Scargle periodogram revealed several peaks above the 99% significance level. The longest one—about 95 days—corresponds to the innermost stable circular orbit (ISCO) period of the more massive black hole. The 43-day period could be an alias, or it can be attributed to accretion in the form of a two-armed spiral wave.
dc.identifier.eissn2075-4434
dc.identifier.jour-issn2075-4434
dc.identifier.olddbid188835
dc.identifier.oldhandle10024/171929
dc.identifier.urihttps://www.utupub.fi/handle/11111/56273
dc.identifier.urlhttp://www.mdpi.com/2075-4434/4/4/41
dc.identifier.urnURN:NBN:fi-fe2021042716027
dc.language.isoen
dc.okm.affiliatedauthorValtonen, Mauri
dc.okm.affiliatedauthorNilsson, Kari
dc.okm.affiliatedauthorPiirola, Vilppu
dc.okm.affiliatedauthorBerdyugin, Andrei
dc.okm.affiliatedauthorFallah Ramazani, Vandad
dc.okm.affiliatedauthorHarmanen, Jussi
dc.okm.affiliatedauthorLindfors, Elina
dc.okm.affiliatedauthorReinthal, Riho
dc.okm.affiliatedauthorSadegi, Sepidehsadat
dc.okm.affiliatedauthorTakalo, Leo
dc.okm.discipline115 Astronomy and space scienceen_GB
dc.okm.discipline115 Avaruustieteet ja tähtitiedefi_FI
dc.okm.internationalcopublicationinternational co-publication
dc.okm.internationalityInternational publication
dc.okm.typeA1 ScientificArticle
dc.publisherM D P I AG
dc.publisher.countrySwitzerlanden_GB
dc.publisher.countrySveitsifi_FI
dc.publisher.country-codeCH
dc.publisher.placeBasel
dc.relation.articlenumber41
dc.relation.doi10.3390/galaxies4040041
dc.relation.ispartofjournalGalaxies
dc.relation.issue4
dc.relation.volume4
dc.source.identifierhttps://www.utupub.fi/handle/10024/171929
dc.titleA Search for QPOs in the Blazar OJ287: Preliminary Results from the 2015/2016 Observing Campaign
dc.year.issued2016

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