Goto065054+593624: a 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; S. Mattila; A. Sahu; R. Starling; Q. Liu; A. Li; Z. Dai; H. Feng; W. Yuan; R. Billington; 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: a 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. UlaczykD. 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, S. Mattila, A. Sahu, R. Starling, Q. Liu, A. Li, Z. Dai, H. Feng, W. Yuan, R. Billington, 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

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Abstract

Dwarf 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 8.5 mag. 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.

Original language	English
Article number	A8
Pages (from-to)	1-14
Number of pages	14
Journal	Astronomy and Astrophysics
Volume	699
Issue number	7
DOIs	https://doi.org/10.1051/0004-6361/202553823
Publication status	Published - 1 Jul 2025

Keywords

astro-ph.SR
astro-ph.HE
stars: dwarf novae
binaries: close
stars: cataclysmic variables
UKRI
STFC
MR/T020784/1
ST/X508871/1
ST/V000853/1
ST/X001075/1
ST/T007184/1
ST/T003103/1
ST/T000406/1
ST/X001121/1
ST/Z000165/1

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10.1051/0004-6361/202553823Licence: CC BY

aa53823-25Final published version, 2.67 MBLicence: CC BY

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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: a 8.5 mag amplitude dwarf nova identified in real time via Kilonova Seekers. Astronomy and Astrophysics, 699(7), 1-14. Article A8. https://doi.org/10.1051/0004-6361/202553823

@article{12b9d2006c29439eb29ca6fbd697fe81,

title = "Goto065054+593624: a 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 -- 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 8.5 mag. 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. ",

keywords = "astro-ph.SR, astro-ph.HE, stars: dwarf novae, binaries: close, stars: cataclysmic variables, UKRI, STFC, MR/T020784/1, ST/X508871/1, ST/V000853/1, ST/X001075/1, ST/T007184/1, ST/T003103/1, ST/T000406/1, ST/X001121/1, ST/Z000165/1",

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 S. Mattila and A. Sahu and R. Starling and Q. Liu and A. Li and Z. Dai and H. Feng and W. Yuan and R. Billington and S. Gaudenzi and V. Gonano and H. Krawczyk and Mazzucato, \{M. T.\} and A. Pasqua and Campos, \{J. A. da Silva\} 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",

note = "14 pages, 15 figures. Accepted to A\&A",

year = "2025",

month = jul,

day = "1",

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

language = "English",

volume = "699",

pages = "1--14",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

number = "7",

}

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, Mattila, S, Sahu, A, Starling, R, Liu, Q, Li, A, Dai, Z, Feng, H, Yuan, W, Billington, R, Gaudenzi, S, Gonano, V, Krawczyk, H, Mazzucato, MT, Pasqua, A, Campos, JADS, Torres-Guerrero, M, Antonov, NN, Bean, SJ, Boeneker, ET, Brincat, SM, Darlington, GS, Dubois, F, Hambsch, F-J, Messier, D, Oksanen, A, Poyner, G, Romanov, FD, Sharp, ID, Tordai, T, Vanmunster, T & Wenzel, K 2025, 'Goto065054+593624: a 8.5 mag amplitude dwarf nova identified in real time via Kilonova Seekers', Astronomy and Astrophysics, vol. 699, no. 7, A8, pp. 1-14. https://doi.org/10.1051/0004-6361/202553823

TY - JOUR

T1 - Goto065054+593624

T2 - a 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 - Mattila, S.

AU - Sahu, A.

AU - Starling, R.

AU - Liu, Q.

AU - Li, A.

AU - Dai, Z.

AU - Feng, H.

AU - Yuan, W.

AU - Billington, R.

AU - Gaudenzi, S.

AU - Gonano, V.

AU - Krawczyk, H.

AU - Mazzucato, M. T.

AU - Pasqua, A.

AU - Campos, J. A. da Silva

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.

N1 - 14 pages, 15 figures. Accepted to A&A

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 -- 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 8.5 mag. 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.

AB - Dwarf 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 8.5 mag. 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.

KW - astro-ph.SR

KW - astro-ph.HE

KW - stars: dwarf novae

KW - binaries: close

KW - stars: cataclysmic variables

KW - UKRI

KW - STFC

KW - MR/T020784/1

KW - ST/X508871/1

KW - ST/V000853/1

KW - ST/X001075/1

KW - ST/T007184/1

KW - ST/T003103/1

KW - ST/T000406/1

KW - ST/X001121/1

KW - ST/Z000165/1

U2 - 10.1051/0004-6361/202553823

DO - 10.1051/0004-6361/202553823

M3 - Article

SN - 0004-6361

VL - 699

SP - 1

EP - 14

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 7

M1 - A8

ER -

Goto065054+593624: a 8.5 mag amplitude dwarf nova identified in real time via Kilonova Seekers

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Keywords

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