[vsnet-alert 28066] TCP J18513997+3522412: large-amplitude modulation, possibly eclipsing WZ Sge-type dwarf nova?
TCP J18513997+3522412: large-amplitude modulation, possibly eclipsing WZ Sge-type dwarf nova?
TCP J18513997+3522412 was discovered by Y. Nakamura on 22nd May at 13.7 mag (unfiltered). The counterpart star in Pan-STARRS1 is r~20.5 mag, and thus the outburst amplitude is 6.8 mag. http://www.cbat.eps.harvard.edu/unconf/followups/J18513997+3522412.html https://www.aavso.org/vsx/index.php?view=detail.top&oid=10848644
Sano-san reported the time-resolved observations of this object. Although the baseline was just one hour, the light curve shows a large-amplitude modulation of ~0.35 mag. This is likely either an ordinary superhump in a SU UMa-type dwarf nova or even a large-amplitude early superhump + eclipse in an eclipsing WZ Sge-type dwarf nova.
Further time-resolved observations with longer baselines are encouraged.
Best regards, Yusuke
TCP J18513997+3522412: confirmation as a WZ Sge-type dwarf nova
Sano-san and Sjoerd Dufoer reported further time-resolved observations of TCP J18513997+3522412. These show double-peaked modulations with a period of 0.0563(1) d and an amplitude of ~0.15 mag, likely large-amplitude early superhumps. Thus, I confirm that TCP J18513997+3522412 is a new WZ Sge-type dwarf nova.
This object is currently ~15.0 mag, and further time-resolved observations are encouraged. Best regards, Yusuke
vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp
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Yusuke Tampo