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

Dwarf 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.

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Publication Details

Journal
Astronomy and Astrophysics
Published
2025-07-01
DOI
https://doi.org/10.1051/0004-6361/202553823
Citations
2
Primary Topic
Astrophysical Phenomena and Observations
Type
article
Field-Weighted Citation Impact
2.31

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article

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

S. P. Littlefair, Cledison Marcos da Silva, J. D. Lyman, M. Mazzucato et al.
2 citations
Astronomy and Astrophysics
Astrophysical Phenomena and Observations
2.31
article

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

S. P. Littlefair, Cledison Marcos da Silva, J. D. Lyman, M. Mazzucato, M. Pursiainen, K. Noysena, T. Tordai, D. Pollacco, Klaus Wenzel, A. Sahu, Svetoslav Alexandrov, Ε. Πάλλη, M. Kennedy, F. Jiménez-Ibarra, G. Poyner, Tonny Vanmunster, Huanbo Feng, Aline Bull, S J Bean, Qifa Liu, D.H. O’Neill, R. P. Breton, David Messier, K. Ackley, A. Oksanen, Richard Wilson, S. Mattila, Gavin Ramsay, Antonio Pasqua, Franz-Josef Hambsch, Thomas L. Killestein, Graham Darlington, Franky Dubois, T. Butterley, R. Kotak, Amit Kumar, R. Leadbeater, Coleman Krawczyk, D. Steeghs, D. K. Galloway, Bob Warwick, L Kelsey, K. Ulaczyk, V. S. Dhillon, Martin J. Dyer, R. L. C. Starling, Ian D. Sharp, F. D. Romanov, V. Gonano, Stephen M. Brincat, B. Godson, E. G. Wickens, Wei Yuan, J. Li, Chi‐Yun Wang, S. Gaudenzi, P. O’Brien, Zhibin Dai, José A. da Silva Campos, L. K. Nuttall, R. Billington, H. Krawczyk, M. Torres-Guerrero, N. N. Antonov, E. T. Boeneker
article en
2 citations

Abstract

Dwarf 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.

Astronomy and AstrophysicsVol. 699
Royal Astronomical Society (GB), University of Leicester (GB), University of Turku (FI), Royal Holloway University of London (GB), Durham University (GB), Chinese Academy of Sciences (CN), American Association of Variable Star Observers (US), European University Cyprus (CY), British Astronomical Association (GB), University of Cambridge (GB), Bulgarian Academy of Sciences (BG), Beijing Normal University (CN), University College Cork (IE), Armagh Observatory & Planetarium (GB), Yunnan Observatories (CN), Royal Society Te Apārangi (NZ), University of Manchester (GB), University of Warwick (GB), University of Oxford (GB), Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne (DE), Queen Astrid Military Hospital (BE), South African Radio Astronomy Observatory (ZA), Hungarian Astronomical Association (HU), Vlaamse Vereniging voor Obstetrie en Gynaecolo (BE), Instituto de Astrofísica de Canarias (ES), Institute of Plant Physiology and Genetics (BG), Institute of High Energy Physics (CN), Hankasalmi Observatory (FI), Backyard Brains (United States) (US), National Astronomical Observatories (CN), University of Chinese Academy of Sciences (CN), Monash University (AU), University of Portsmouth (GB), Saint Mary's University (CA), National Astronomical Research Institute of Thailand (TH), University of Sheffield (GB), Tsinghua University (CN)
National Science Foundation, Smithsonian Institution, Alfred P. Sloan Foundation, Aarhus Universitet, University of Portsmouth, UK Research and Innovation, National Astronomical Research Institute of Thailand, Leverhulme Trust, University of Leicester, University of Warwick, European Commission, Monash University, Academy of Finland, Chinese Academy of Sciences, Centre National d’Etudes Spatiales, Liverpool John Moores University, Isaac Newton Trust, Universitetet i Oslo, Háskóli Íslands, Turun Yliopisto, Stockholms Universitet, People's Government of Yunnan Province, Instituto de Astrofísica de Canarias, Turun Yliopistosäätiö, Science and Technology Facilities Council
Openalex Percentile: Top 11%
Astrophysical Phenomena and Observations
2.31
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