2025A&A...699A...8K

Query : 2025A&A...699A...8K

2025A&A...699A...8K - Astronomy and Astrophysics, volume 699A8 (2025/7-1)

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

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. and WENZEL K.

Abstract (from CDS):

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.

Abstract Copyright: © The Authors 2025

Journal keyword(s): binaries: close - stars: dwarf novae - novae, cataclysmic variables

VizieR on-line data: <Available at CDS (J/A+A/699/A8): tablea1.dat>

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* EZ Lyn CV* 08 04 34.2185575584 +51 03 49.366034352       17.4   DC: 85 0
2 V* EG Cnc CV* 08 43 03.9863206560 +27 51 49.693595508           DAe 195 0
3 CRTS J122221.6-311525 CV* 12 22 21.6662638104 -31 15 23.828998536   18.2   18.2   ~ 45 0
4 V* AL Com CV* 12 32 25.7951754648 +14 20 42.292188276     16.2     ~ 249 0
5 V* GW Lib No* 15 19 55.3333785336 -25 00 24.614534520           DA: 228 0
6 V* QZ Lib CV* 15 36 15.9757214232 -08 39 07.522042824           ~ 41 0
7 V* V386 Ser CV* 16 10 33.6304596192 -01 02 23.216047440           DA: 47 0
8 V* WZ Sge CV* 20 07 36.5037622512 +17 42 14.733254952   15.30 15.20 10.817   D 982 0
9 MASTER OT J213806.60+261957.0 CV* 21 38 06.6254940456 +26 19 56.032997592 15.69 15.72 15.23 14.76 14.30 ~ 54 0
10 V* V455 And CV* 23 34 01.4484962496 +39 21 40.866079356   16.220 16.094 16.137   DQ 166 0

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