J/A+A/699/A8 Photometric observations of GOTO065054+593624 (Killestein+, 2025)
GOTO 065054+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., Wenzel K.
<Astron. Astrophys. 699, A8 (2025)>
=2025A&A...699A...8K 2025A&A...699A...8K (SIMBAD/NED BibCode)
ADC_Keywords: Novae ; Binaries, eclipsing ; Photometry, UBVRI ;
Photometry, SDSS ; Photometry, ultraviolet
Keywords: binaries: close - stars: dwarf novae - stars: cataclysmic variables
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 8.5mag. 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.
Description:
Collated photometry of GOTO0650 from throughout the 2024
superoutburst. A full description of the photometric reduction is
detailed in the manuscript. AAVSO and ZTF data may be retrieved from
their respective archives.
Objects:
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RA (2000) DE Designation(s)
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06 50 45 +59 36 24 GOTO 065054+593624
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 37 412 Photometry of GOTO 065054+593624
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 8 F8.2 d MJD Observation time in MJD
10- 14 F5.1 d Phase Number of days since discovery
16- 19 A4 --- Band Photometric filter (1)
21- 25 F5.2 mag mag Magnitude in Band (AB)
27- 30 F4.2 mag e_mag Uncertainty in magnitude
32- 37 A6 --- Tel Telescope data taken with
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Note (1): Filters are L (GOTO), BVRI (pt5m), U, UVM2, UVW1, UVW2 (SWIFT),
V (LJT), ugriz (LCO), ugriz (TTT), g (GOTITO).
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Acknowledgements:
Thomas Killestein, thomas.killestein(at)warwick.ac.uk
(End) Patricia Vannier [CDS] 14-May-2025