J/A+A/699/A8ivo://CDS.VizieR/J/A+A/699/A8doi:10.26093/cds/vizier/bc-nv/liCDSKillestein T.L.Ramsay G.Kennedy M.Kelsey L.Steeghs D.,Littlefair S.Godson B.Lyman J.Pursiainen M.Warwick B.Krawczyk C.,Nuttall L.K.Wickens E.Alexandrov S.D.da Silva C.M.Leadbeater R.,Ackley K.Dyer M.J.Jimenez-Ibarra F.Ulaczyk K.Galloway D.K.,Dhillon V.S.O'Brien P.Noysena K.Kotak R.Breton R.P.Palle E.,Pollacco D.Kumar A.O'Neill D.Butterley T.Wilson R.Mattila S.,Sahu A.Starling R.Wang C.Y.Liu Q.Li A.Dai Z.Feng H.Yuan W.,Billington R.Bull A.G.Gaudenzi S.Gonano V.Krawczyk H.,Mazzucato M.T.Pasqua A.da Silva Campos J.A.Torres-Guerrero M.,Antonov N.N.Bean S.J.Boeneker E.T.Brincat S.M.Darlington G.S.,Dubois F.Hambsch F.-J.Messier D.Oksanen A.Poyner G.Romanov F.D.,Sharp I.D.Tordai T.Vanmunster T.Wenzel K.2026-08-03T06:56:01Z2025-07-01T12:04:30ZCDS support team

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

cds-question@unistra.frnovaeeclipsing-binary-starsinfrared-photometryvisible-astronomybroad-band-photometrysloan-photometryultraviolet-photometryDwarf novae are astrophysical laboratories for probing the nature of accretion, binary mass transfer, and binary evolution -- yet 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, discovered in real-time by citizen scientists via the Kilonova Seekers citizen science project, which has an outburst amplitude of 8.5mag. An extensive dataset charts the photometric and spectroscopic evolution of this object, covering the 2024 superoutburst. GOTO0650 shows an absence of visible emission lines during the high state, strong H and barely-detected HeII emission, and high-amplitude echo outbursts with a rapidly decreasing timescale. The comprehensive dataset presented here marks GOTO0650 as a candidate period bouncer, and highlights the important contribution that citizen scientists can make to the study of Galactic transients.2025A&A...699A...8Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/699/A8CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/699/A8https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/699/A8http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/699/A8https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/699/A8https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/699/A8http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/699/A8GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVOpticalInfrareddefaultJ/A+A/699/A8/tablea1Photometry of GOTO 065054+593624recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDObservation time in MJDdtime.epochdoublePhaseNumber of days since discoverydtime.phasefloatBandPhotometric filter (1)instr.bandpasscharmagMagnitude in Band (AB)magphot.magfloate_magUncertainty in magnitudemagstat.error;phot.magfloatTelTelescope data taken withinstr.telchar