194 citations · 3.1k across the 179 of their papers we have counts for
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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…
Study of the low-amplitude Z Cam star IX Vel
Taichi Kato
IX Vel has been considered as one of the prototypical novalike cataclysmic variables with thermally stable accretion disks. Using All-Sky Automated Survey (ASAS-3) and All-Sky Auto…
MP Gem: VY Scl-type star, finally
Taichi Kato
MP Gem has long been suspected as a long-period eclipsing binary, which had not been seen in faint state for 71 years since the discovery in 1944. Its nature has been a mystery. Us…
Periodic modulations during a long outburst in V363 Lyr
Taichi Kato
I analyzed the Kepler long and short cadence data of V363 Lyr. A period of 0.185723(8) d was persistently detected and this is identified as the orbital period. V363 Lyr showed one…
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…
A code for two-dimensional frequency analysis using the Least Absolute Shrinkage and Selection Operator (Lasso) for multidisciplinary use
Taichi Kato
In Kato and Uemura (2012), we introduced the Least Absolute Shrinkage and Selection Operator (Lasso) method, a kind of sparse modeling, to study frequency structures of variable st…