A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
GOTO065054+593624: An 8.5 mag amplitude dwarf nova identified in real time via Kilonova Seekers
Tekijät: Killestein, 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.
Kustantaja: EDP Sciences
Kustannuspaikka: LES ULIS CEDEX A
Julkaisuvuosi: 2025
Journal: Astronomy and Astrophysics
Tietokannassa oleva lehden nimi: Astronomy & Astrophysics
Lehden akronyymi: ASTRON ASTROPHYS
Artikkelin numero: A8
Vuosikerta: 699
Sivujen määrä: 14
ISSN: 0004-6361
eISSN: 1432-0746
DOI: https://doi.org/10.1051/0004-6361/202553823
Verkko-osoite: https://doi.org/10.1051/0004-6361/202553823
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/499284253
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.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
Julkaisussa olevat rahoitustiedot:
We thank the anonymous referee for their insightful comments, that greatly improved the manuscript. TLK acknowledges support from the Turku University Foundation (grant no. 081810). TLK acknowledges a Warwick Astrophysics prize postdoctoral fellowship made possible thanks to a generous philanthropic donation. LK acknowledges support for an Early Career Fellowship from the Leverhulme Trust through grant ECF-2024-054 and the Isaac Newton Trust through grant 24.08(w). JL, MP, and DON acknowledge support from a UK Research and Innovation Fellowship (MR/T020784/1). BW and BG acknowledge the UKRI's STFC studentship grant funding, project reference ST/X508871/1. AK is supported by the UK Science and Technology Facilities Council (STFC) Consolidated grant ST/V000853/1. RK acknowledges support via the Research Council of Finland (grant 340613). SM acknowledges support from the Research Council of Finland project 350458. AS acknowledges the Warwick Astrophysics PhD prize scholarship made possible thanks to a generous philanthropic donation. RW and TB acknowledge financial support from Science and Technology Facilities Council (STFC, grant number ST/X001075/1). The pt5m telescope is supported by the Isaac Newton Group of Telescopes in La Palma. RS acknowledges support from the Leverhulme Trust grant RPG-2023-240. Armagh Observatory and Planetarium is core funded by the Northern Ireland Executive through the Dept of Communities. The Gravitational-wave Optical Transient Observer (GOTO) project acknowledges the support of the Monash-Warwick Alliance; University of Warwick; Monash University; University of Sheffield; University of Leicester; Armagh Observatory & Planetarium; the National Astronomical Research Institute of Thailand (NARIT); Instituto de Astrofísica de Canarias (IAC); University of Portsmouth; University of Turku. We acknowledge support from the Science and Technology Facilities Council (STFC, grant numbers ST/T007184/1, ST/T003103/1, ST/T000406/1, ST/X001121/1 and ST/Z000165/1). This transient was discovered with the assistance of the GOTO Kilonova Seekers Citizen Scientists on Zooniverse. This publication uses data generated via the Zooniverse.org platform, development of which is funded by generous support, including a Global Impact Award from Google, and by a grant from the Alfred P. Sloan Foundation. We acknowledge with thanks the variable star observations from the AAVSO International Database contributed by observers worldwide and used in this research. This work has made use of observations made by the Las Cumbres Observatory network of 0.4m telescopes, as part of the LCOGT Global Sky Partners project ‘Kilonova Seekers - LCO: STAR’ (PIs: L. Kelsey and T. Killestein). The authors thank E. Gomez for his support through the Global Sky Partners program. The Liverpool Telescope is operated on the island of La Palma by Liverpool John Moores University in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias with financial support from the UK Science and Technology Facilities Council. Based on observations made with the Nordic Optical Telescope, owned in collaboration by the University of Turku and Aarhus University, and operated jointly by Aarhus University, the University of Turku and the University of Oslo, representing Denmark, Finland and Norway, the University of Iceland and Stockholm University at the Observatorio del Roque de los Muchachos, La Palma, Spain, of the Instituto de Astrofisica de Canarias. The data presented here were obtained in part with ALFOSC, which is provided by the Instituto de Astrofisica de Andalucia (IAA) under a joint agreement with the University of Copenhagen and NOT. This article includes observations made in the Two-meter Twin Telescope (TTT) sited at the Teide Observatory of the Instituto de Astrofísica de Canarias (IAC), that Light Bridges operates in the Island of Tenerife, Canary Islands (Spain). The Observing Time Rights (DTO) used for this research were provided by Light Bridges, SL. This work is based on the data obtained with Einstein Probe, a space mission supported by Strategic Priority Program on Space Science of Chinese Academy of Sciences, in collaboration with ESA, MPE and CNES (Grant No. XDA15310000). We acknowledge the support of the staff of the Lijiang 2.4m telescope. Funding for the telescope has been provided by Chinese Academy of Sciences and the People's Government of Yunnan Province Z.-B.D. acknowledges support from the CAS Light of West China Program, the Yunnan Youth Talent Project, the Yunnan Fundamental Research Projects (grant No. 2016FB007, No. 202201AT070180). This work has made use of data provided by Digital Access to a Sky Century @ Harvard (DASCH), which has been partially supported by NSF grants AST-0407380, AST-0909073, and AST-1313370. Work on DASCH Data Release 7 received support from the Smithsonian American Women's History Initiative Pool. This research has used data, tools or materials developed as part of the EXPLORE project that has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 101004214.
