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

T. L. Killestein; G. Ramsay; M. Kennedy; L. Kelsey; D. Steeghs; S. Littlefair; B. Godson; J. Lyman; M. Pursiainen; B. Warwick; C. Krawczyk; L. K. Nuttall; E. Wickens; S. D. Alexandrov; C. M. Da Silva; R. Leadbeater; K. Ackley; M. J. Dyer; F. Jiménez-Ibarra; K. Ulaczyk; D. K. Galloway; V. S. Dhillon; P. O-Brien; K. Noysena; R. Kotak; R. P. Breton; E. Pallé; D. Pollacco; A. Kumar; D. O-Neill; T. Butterley; R. Wilson; S. Mattila; A. Sahu; R. Starling; C. Y. Wang; Q. Liu; A. Li; Z. Dai; H. Feng; W. Yuan; R. Billington; A. G. Bull; S. Gaudenzi; V. Gonano; H. Krawczyk; M. T. Mazzucato; A. Pasqua; J. A. Da Silva Campos; M. Torres-Guerrero; N. N. Antonov; S. J. Bean; E. T. Boeneker; S. M. Brincat; G. S. Darlington; F. Dubois; F. J. Hambsch; D. Messier; A. Oksanen; G. Poyner; F. D. Romanov; I. D. Sharp; T. Tordai; T. Vanmunster; K. Wenzel

doi:10.1051/0004-6361/202553823

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

T. L. Killestein
, G. Ramsay
, M. Kennedy
, L. Kelsey
, D. Steeghs
, S. Littlefair
, B. Godson
, J. Lyman
, M. Pursiainen
, B. Warwick
, C. Krawczyk
, L. K. Nuttall
, E. Wickens
, S. D. Alexandrov
, C. M. Da Silva
, R. Leadbeater
, K. Ackley
, M. J. Dyer
, F. Jiménez-Ibarra
, K. Ulaczyk

D. K. Galloway, V. S. Dhillon, P. O-Brien, K. Noysena, R. Kotak, R. P. Breton, E. Pallé, D. Pollacco, A. Kumar, D. O-Neill, T. Butterley, R. Wilson, S. Mattila, A. Sahu, R. Starling, C. Y. Wang, Q. Liu, A. Li, Z. Dai, H. Feng, W. Yuan, R. Billington, A. G. Bull, S. Gaudenzi, V. Gonano, H. Krawczyk, M. T. Mazzucato, A. Pasqua, J. A. Da Silva Campos, M. Torres-Guerrero, N. N. Antonov, S. J. Bean, E. T. Boeneker, S. M. Brincat, G. S. Darlington, F. Dubois, F. J. Hambsch, D. Messier, A. Oksanen, G. Poyner, F. D. Romanov, I. D. Sharp, T. Tordai, T. Vanmunster, K. Wenzel

School of Physics

University of Turku
University of Warwick
Armagh Observatory
University of Cambridge
University of Sheffield
University of Portsmouth
University of Oxford
Bulgarian Academy of Sciences
American Association of Variable Star Observers
Royal Astronomical Society of New Zealand
British Astronomical Association
Monash University
Instituto de Astrofísica de Canarias
University of Leicester
National Astronomical Research Institute of Thailand
University of Manchester
Royal Holloway University of London
Durham University
European University Cyprus
Tsinghua University
Beijing Normal University
CAS - National Astronomical Observatories
Chinese Academy of Sciences
CAS - Institute of High Energy Physics
University of Chinese Academy of Sciences
Royal Astronomical Society
Siena Academy of Sciences
Astronomical Soc. of Southern Africa
Institute for Advanced Physical Studies
Provinciaal Domein-de Palingbeek
Vereniging voor Sterrenkunde (VVS)
Groupe Européen D-Observations Stellaires (GEOS)
Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.V. (BAV)
Center for Backyard Astrophysics
Hankasalmi Observatory
Saint Mary's University Halifax
Hungarian Astronomical Association

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	A8
Journal	Astronomy and Astrophysics
Volume	699
DOIs	https://doi.org/10.1051/0004-6361/202553823
Publication status	Published - 1 Jul 2025

Keywords

Binaries: close
Novae, cataclysmic variables
Stars: dwarf novae

Access to Document

10.1051/0004-6361/202553823

Cite this

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., Jiménez-Ibarra, F., ... Wenzel, K. (2025). GOTO065054+593624: An 8.5-mag amplitude dwarf nova identified in real time via Kilonova Seekers. Astronomy and Astrophysics, 699, Article A8. https://doi.org/10.1051/0004-6361/202553823

@article{dcacea0d34a84cb8ad4ccb1ee79e3998,

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

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.",

keywords = "Binaries: close, Novae, cataclysmic variables, Stars: dwarf novae",

author = "Killestein, \{T. L.\} and G. Ramsay and M. Kennedy and L. Kelsey and D. Steeghs and S. Littlefair and B. Godson and J. Lyman and M. Pursiainen and B. Warwick and C. Krawczyk and Nuttall, \{L. K.\} and E. Wickens and Alexandrov, \{S. D.\} and \{Da Silva\}, \{C. M.\} and R. Leadbeater and K. Ackley and Dyer, \{M. J.\} and F. Jim{\'e}nez-Ibarra and K. Ulaczyk and Galloway, \{D. K.\} and Dhillon, \{V. S.\} and P. O-Brien and K. Noysena and R. Kotak and Breton, \{R. P.\} and E. Pall{\'e} and D. Pollacco and A. Kumar and D. O-Neill and T. Butterley and R. Wilson and S. Mattila and A. Sahu and R. Starling and Wang, \{C. Y.\} and Q. Liu and A. Li and Z. Dai and H. Feng and W. Yuan and R. Billington and Bull, \{A. G.\} and S. Gaudenzi and V. Gonano and H. Krawczyk and Mazzucato, \{M. T.\} and A. Pasqua and \{Da Silva Campos\}, \{J. A.\} and M. Torres-Guerrero and Antonov, \{N. N.\} and Bean, \{S. J.\} and Boeneker, \{E. T.\} and Brincat, \{S. M.\} and Darlington, \{G. S.\} and F. Dubois and Hambsch, \{F. J.\} and D. Messier and A. Oksanen and G. Poyner and Romanov, \{F. D.\} and Sharp, \{I. D.\} and T. Tordai and T. Vanmunster and K. Wenzel",

year = "2025",

month = jul,

day = "1",

doi = "10.1051/0004-6361/202553823",

language = "English",

volume = "699",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Killestein, TL, Ramsay, G, Kennedy, M, Kelsey, L, Steeghs, D, Littlefair, S, Godson, B, Lyman, J, Pursiainen, M, Warwick, B, Krawczyk, C, Nuttall, LK, Wickens, E, Alexandrov, SD, Da Silva, CM, Leadbeater, R, Ackley, K, Dyer, MJ, Jiménez-Ibarra, F, Ulaczyk, K, Galloway, DK, Dhillon, VS, O-Brien, P, Noysena, K, Kotak, R, Breton, RP, Pallé, E, Pollacco, D, Kumar, A, O-Neill, D, Butterley, T, Wilson, R, Mattila, S, Sahu, A, Starling, R, Wang, CY, Liu, Q, Li, A, Dai, Z, Feng, H, Yuan, W, Billington, R, Bull, AG, Gaudenzi, S, Gonano, V, Krawczyk, H, Mazzucato, MT, Pasqua, A, Da Silva Campos, JA, Torres-Guerrero, M, Antonov, NN, Bean, SJ, Boeneker, ET, Brincat, SM, Darlington, GS, Dubois, F, Hambsch, FJ, Messier, D, Oksanen, A, Poyner, G, Romanov, FD, Sharp, ID, Tordai, T, Vanmunster, T & Wenzel, K 2025, 'GOTO065054+593624: An 8.5-mag amplitude dwarf nova identified in real time via Kilonova Seekers', Astronomy and Astrophysics, vol. 699, A8. https://doi.org/10.1051/0004-6361/202553823

TY - JOUR

T1 - GOTO065054+593624

T2 - An 8.5-mag amplitude dwarf nova identified in real time via Kilonova Seekers

AU - Killestein, T. L.

AU - Ramsay, G.

AU - Kennedy, M.

AU - Kelsey, L.

AU - Steeghs, D.

AU - Littlefair, S.

AU - Godson, B.

AU - Lyman, J.

AU - Pursiainen, M.

AU - Warwick, B.

AU - Krawczyk, C.

AU - Nuttall, L. K.

AU - Wickens, E.

AU - Alexandrov, S. D.

AU - Da Silva, C. M.

AU - Leadbeater, R.

AU - Ackley, K.

AU - Dyer, M. J.

AU - Jiménez-Ibarra, F.

AU - Ulaczyk, K.

AU - Galloway, D. K.

AU - Dhillon, V. S.

AU - O-Brien, P.

AU - Noysena, K.

AU - Kotak, R.

AU - Breton, R. P.

AU - Pallé, E.

AU - Pollacco, D.

AU - Kumar, A.

AU - O-Neill, D.

AU - Butterley, T.

AU - Wilson, R.

AU - Mattila, S.

AU - Sahu, A.

AU - Starling, R.

AU - Wang, C. Y.

AU - Liu, Q.

AU - Li, A.

AU - Dai, Z.

AU - Feng, H.

AU - Yuan, W.

AU - Billington, R.

AU - Bull, A. G.

AU - Gaudenzi, S.

AU - Gonano, V.

AU - Krawczyk, H.

AU - Mazzucato, M. T.

AU - Pasqua, A.

AU - Da Silva Campos, J. A.

AU - Torres-Guerrero, M.

AU - Antonov, N. N.

AU - Bean, S. J.

AU - Boeneker, E. T.

AU - Brincat, S. M.

AU - Darlington, G. S.

AU - Dubois, F.

AU - Hambsch, F. J.

AU - Messier, D.

AU - Oksanen, A.

AU - Poyner, G.

AU - Romanov, F. D.

AU - Sharp, I. D.

AU - Tordai, T.

AU - Vanmunster, T.

AU - Wenzel, K.

PY - 2025/7/1

Y1 - 2025/7/1

N2 - 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.

AB - 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.

KW - Binaries: close

KW - Novae, cataclysmic variables

KW - Stars: dwarf novae

UR - https://www.scopus.com/pages/publications/105010521021

U2 - 10.1051/0004-6361/202553823

DO - 10.1051/0004-6361/202553823

M3 - Article

AN - SCOPUS:105010521021

SN - 0004-6361

VL - 699

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A8

ER -

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

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this