GOTO065054+593624: An 8.5-mag amplitude dwarf nova identified in real time via Kilonova Seekers

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dc.contributor.authorKillestein, T. L.en
dc.contributor.authorRamsay, G.en
dc.contributor.authorKennedy, Mark R.en
dc.contributor.authorKelsey, L.en
dc.contributor.authorSteeghs, D.en
dc.contributor.authorLittlefair, S.en
dc.contributor.authorGodson, B.en
dc.contributor.authorLyman, J.en
dc.contributor.authorPursiainen, M.en
dc.contributor.authorWarwick, B.en
dc.contributor.authorKrawczyk, C.en
dc.contributor.authorNuttall, L. K.en
dc.contributor.authorWickens, E.en
dc.contributor.authorAlexandrov, S. D.en
dc.contributor.authorDa Silva, C. M.en
dc.contributor.authorLeadbeater, R.en
dc.contributor.authorAckley, K.en
dc.contributor.authorDyer, M. J.en
dc.contributor.authorJiménez-Ibarra, F.en
dc.contributor.authorUlaczyk, K.en
dc.contributor.authorGalloway, D. K.en
dc.contributor.authorDhillon, V. S.en
dc.contributor.authorO-Brien, P.en
dc.contributor.authorNoysena, K.en
dc.contributor.authorKotak, R.en
dc.contributor.authorBreton, R. P.en
dc.contributor.authorPallé, E.en
dc.contributor.authorPollacco, D.en
dc.contributor.authorKumar, A.en
dc.contributor.authorO-Neill, D.en
dc.contributor.authorButterley, T.en
dc.contributor.authorWilson, R.en
dc.contributor.authorMattila, S.en
dc.contributor.authorSahu, A.en
dc.contributor.authorStarling, R.en
dc.contributor.authorWang, C. Y.en
dc.contributor.authorLiu, Q.en
dc.contributor.authorLi, A.en
dc.contributor.authorDai, Z.en
dc.contributor.authorFeng, H.en
dc.contributor.authorYuan, W.en
dc.contributor.authorBillington, R.en
dc.contributor.authorBull, A. G.en
dc.contributor.authorGaudenzi, S.en
dc.contributor.authorGonano, V.en
dc.contributor.authorKrawczyk, H.en
dc.contributor.authorMazzucato, M. T.en
dc.contributor.authorPasqua, A.en
dc.contributor.authorDa Silva Campos, J. A.en
dc.contributor.authorTorres-Guerrero, M.en
dc.contributor.authorAntonov, N. N.en
dc.contributor.authorBean, S. J.en
dc.contributor.authorBoeneker, E. T.en
dc.contributor.authorBrincat, S. M.en
dc.contributor.authorDarlington, G. S.en
dc.contributor.authorDubois, F.en
dc.contributor.authorHambsch, F.-J.en
dc.contributor.authorMessier, D.en
dc.contributor.authorOksanen, A.en
dc.contributor.authorPoyner, G.en
dc.contributor.authorRomanov, F. D.en
dc.contributor.authorSharp, I. D.en
dc.contributor.authorTordai, T.en
dc.contributor.authorVanmunster, T.en
dc.contributor.authorWenzel, K.en
dc.contributor.funderIsland of Tenerifeen
dc.contributor.funderStockholms Universiteten
dc.contributor.funderNational Astronomical Research Institute of Thailanden
dc.contributor.funderNorthern Ireland Executiveen
dc.contributor.funderGoogleen
dc.contributor.funderNOTen
dc.contributor.funderMPEen
dc.contributor.funderAarhus Universiteten
dc.contributor.funderInstituto de Astrofísica de Canariasen
dc.contributor.funderKøbenhavns Universiteten
dc.contributor.funderSmithsonian American Women's Historyen
dc.contributor.funderUniversity of Leicesteren
dc.contributor.funderUniversity of Warwicken
dc.contributor.funderMonash-Warwick Allianceen
dc.contributor.funderInstituto de Astrofísica de Andalucíaen
dc.contributor.funderYunnan Youth Talent Projecten
dc.contributor.funderMonash Universityen
dc.contributor.funderUniversitetet i Osloen
dc.contributor.funderAlfred P. Sloan Foundationen
dc.contributor.funderHáskóli Íslandsen
dc.contributor.funderUniversity of Portsmouthen
dc.contributor.funderLiverpool John Moores Universityen
dc.contributor.funderChinese Academy of Sciencesen
dc.contributor.funderESAen
dc.contributor.funderUniversity of Sheffielden
dc.contributor.funderScience and Technology Facilities Councilen
dc.contributor.funderLeverhulme Trusten
dc.contributor.funderResearch Council of Finlanden
dc.contributor.funderUK Research and Innovationen
dc.contributor.funderHorizon 2020 Framework Programmeen
dc.contributor.funderUniversity of Kentuckyen
dc.contributor.funderTurun Yliopistoen
dc.contributor.funderIsaac Newton Trusten
dc.contributor.funderTurun Yliopistosäätiöen
dc.contributor.funderNational Science Foundationen
dc.contributor.funderCentre National d’Etudes Spatialesen
dc.contributor.funderYunnan Fundamental Research Projectsen
dc.date.accessioned2025-07-22T10:59:37Z
dc.date.available2025-07-22T10:59:37Z
dc.date.issued2025-07-01en
dc.description.abstractDwarf novae are astrophysical laboratories for probing the nature of accretion, binary mass transfer, and binary evolution, but their diverse observational characteristics continue to challenge our theoretical understanding. We here present the discovery of and subsequent observing campaign on GOTO065054+593624 (hereafter GOTO0650), a dwarf nova of the WZ Sge type that was discovered in real-time by citizen scientists via the Kilonova Seekers citizen science project. The nova has an outburst amplitude of 8.5-mag. An extensive dataset charts the photometric and spectroscopic evolution of this object, and it covers the 2024 superoutburst. GOTO0650 shows an absence of visible emission lines during the high state, strong H and barely detected He II emission, and high-amplitude echo outbursts on a rapidly decreasing timescale. The comprehensive dataset we present marks GOTO0650 as a candidate period bouncer, and it highlights the important contribution made by citizen scientists to the study of Galactic transients.en
dc.description.sponsorshipTurku University Foundation (grant no. 081810);Warwick Astrophysics (Postdoctoral fellowship; PhD prize scholarship); Leverhulme Trust (ECF-2024-054); Isaac Newton Trust (Grant 24.08(w)); UK Research and Innovation Fellowship (MR/T020784/1); UKRI (grant (ST/X508871/1); UK Science and Technology Facilities Council (Consolidated grant ST/V000853/1); Research Council of Finland (grant 340613; 350458); Science and Technology Facilities Council (grant number ST/X001075/1; ST/T007184/1; ST/T003103/1; ST/T000406/1; ST/X001121/1; ST/Z000165/1); Leverhulme Trust (grant RPG-2023-240); Google (Global Impact Award); CNES (Grant No. XDA15310000); CAS (Light of West China Program); Yunnan Fundamental Research Projects (grant No. 2016FB007; 202201AT070180); NSF grants (AST-0407380; AST-0909073; AST-1313370); Horizon 2020 (grant agreement No 101004214); University of Kentucky (MR/T020784/1); Turun Yliopisto (ST/T007184/1; ST/T000406/1; ST/Z000165/1; ST/X001121/1; ST/T003103/1); Isaac Newton Trust (24.08); Turun Yliopistosäätiö (081810); National Science Foundation (AST-0909073; AST-0407380; AST-1313370); Centre National d’Etudes Spatiales (XDA15310000); Yunnan Fundamental Research Projects (2016FB007, 202201AT070180)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleidA8en
dc.identifier.citationKillestein, T. L., Ramsay, G., Kennedy, M., Kelsey, L., Steeghs, D., Littlefair, S., Godson, B., Lyman, J., Pursiainen, M., Warwick, B. and Krawczyk, C. et al (2025) 'GOTO065054+ 593624: An 8.5 mag amplitude dwarf nova identified in real time via Kilonova Seekers', Astronomy & Astrophysics, 699, A8 (14pp). https://doi.org/10.1051/0004-6361/202553823en
dc.identifier.doi10.1051/0004-6361/202553823en
dc.identifier.endpage14en
dc.identifier.issn46361en
dc.identifier.journaltitleAstronomy and Astrophysicsen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/17742
dc.identifier.volume699
dc.language.isoenen
dc.publisherEDP Sciencesen
dc.relation.project101004214en
dc.rights© 2025, the Authors. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectBinaries: closeen
dc.subjectNovaeen
dc.subjectCataclysmic variablesen
dc.subjectStarsen
dc.subjectDwarf novaeen
dc.subject~Physics - Journal Articles~en
dc.titleGOTO065054+593624: An 8.5-mag amplitude dwarf nova identified in real time via Kilonova Seekersen
dc.typeArticle (peer reviewed)en
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