86 citations · 402 across the 39 of their papers we have counts for
11 papers · 1 filter
Orbital period of the IW And-type star ST Cha
Taichi Kato, Naoto Kojiguchi
We analyzed TESS data of the IW And-type dwarf nova ST Cha during ordinary dwarf nova states. We have identified an orbital period of 0.285360(1) d. The object was reported to be e…
ASASSN-19ax: SU UMa-type dwarf nova with a long superhump period and post-superoutburst rebrightenings
Taichi Kato, Hiroshi Itoh, Seiichiro Kiyota +8
We observed ASASSN-19ax during the long outburst in 2021 September-October. The object has been confirmed to be an SU UMa-type dwarf nova with a superhump period of 0.1000-0.1001 d…
MGAB-V859 and ZTF18abgjsdg: ER UMa-type dwarf novae showing standstills
Taichi Kato, Naoto Kojiguchi
Using Public Data Release of Zwicky Transient Facility observations, we found that MGAB-V859 and ZTF18abgjsdg are dwarf novae and show both ER UMa-type and Z Cam-type states. There…
ZTF J185139.81+171430.3 = ZTF18abnbzvx: the second white dwarf pulsar?
Taichi Kato, Naoto Kojiguchi
We found that ZTF J185139.81+171430.3 = ZTF18abnbzvx shows a very short [0.00858995(3) d = 12.37 min] and large-amplitude (0.8 mag) coherent variations using Public Data Release of…
New Candidates for AM Canum Venaticorum Stars among ASAS-SN Transients
Taichi Kato, Naoto Kojiguchi
We studied Zwicky Transient Facility (ZTF) light curves of 34 dwarf nova candidates discovered by All-Sky Automated Survey for Supernovae (ASAS-SN) between 2020 May 12 and Septembe…
V606 Aql (Nova Aquilae 1899) is now a dwarf nova
Taichi Kato, Naoto Kojiguchi
We found that the 1899 nova V606 Aql currently shows dwarf nova outbursts with a typical cycle length of 270 d and amplitudes of ~1.5 mag using Public Data Release of Zwicky Transi…