研究成果
研究成果
4. A probable inside-out dwarf nova outburst from the period bouncer candidate ASASSN-25dc
Tampo, Y., Kojiguchi, N., Kimura, M., Isogai, K.,,,,,,,,,,, Nogami, D., & Kato, T., 2026
Monthly Notices of the Royal Astronomical Society, 548, stag470 (05/2026), ADS
3. Spectral and photometric variability of SS 433 observed with XRISM and simultaneous optical and near-infrared telescopes
Sakai, Y.,,,,,,,,,,,,,,,,,,,, Isogai, K.,, Kimura, M., Murata, K. L., et al., 2026
Publications of the Astronomical Society of Japan, 78, 436 (04/2026), ADS
2. Multiwavelength Campaign Observations of a Young Solar-type Star, EK Draconis. III. Comparison between Starspot Mapping, Zeeman Doppler Imaging, and Multiwavelength Variability
Ikuta, K.,,,,,,,,,,,,,,,,, Nogami, D., & Shibata, K., 2026
The Astrophysical Journal, 1001, 18 (04/2026), ADS
1. WD 1054-226 revisited: A stable transiting debris system
Korth, J.,,,,,,,,,,,,,,,,,,,,,, Isogai, K., et al., 2026
Astronomy and Astrophysics, 709, A27 (04/2026), ADS
3. The observation of AM CVn type star SDSS J080449.49+161624.8
Kunjaya, C., Nogami, D., Isogai, K.,,,,,,, & Tampo, Y., 2026
Journal of Physics Conference Series, 3234, 012011 (05/2026), ADS
2. On the Evoloutionary Pathway of WZ Sge-type Dwarf Nova GOTO065054.49+593624.51
Hoke, H., Isogai, K., Tampo, Y., Muraoka, K., Kojiguchi, N.,,,,, & Nogami, D., 2026
87th Fujihara Seminar: The 50th Anniversary Workshop of the Disk Instability Model in Compact Binary Stars, 45 (04/2026), ADS
1. Superhumps and their Relation to the Disk Instaibility Model
Nogami, D., 2026
87th Fujihara Seminar: The 50th Anniversary Workshop of the Disk Instability Model in Compact Binary Stars, 10 (04/2026), ADS
23. ExoClock Project. IV. A Homogeneous Catalog of 620 Updated Exoplanet Ephemerides
Kokori, A.,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Isogai, K., et al., 2026
The Astrophysical Journal Supplement Series, 283, 5 (03/2026), ADS
22. Characterization of two new transiting sub-Neptunes and a terrestrial planet around M-dwarf hosts
Poultourtzidis, E.,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Isogai, K., et al., 2026
Astronomy and Astrophysics, 707, A106 (03/2026), ADS
21. Doppler imaging combined with high-cadence photometry: I. Revisiting the surface of a pre-main-sequence flare star PW Andromedae
Lee, S.,,,,,,,,,,,,, & Nogami, D., 2026
Astronomy and Astrophysics, 707, A24 (03/2026), ADS
20. Observational study of double superoutbursts in long-orbital-period AM CVn stars
Kojiguchi, N., Isogai, K., Tampo, Y., Kato, T.,,,, Wakamatsu, Y., Ohshima, T., Ito, J., Shibata, M., Ohnishi, R.,
Kimura, M.,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, & Nogami, D., 2026
Publications of the Astronomical Society of Japan, 78, 199 (02/2026), ADS
19. ALMA Band 7 Observations of Water Lines in the Protoplanetary Disk of V883 Ori
Nakasone, H., et al., 2026
The Astrophysical Journal, 998, 53 (02/2026), ADS
18. The K-dwarfs Survey I. Four Validated Planets from the Radius Valley to the Neptune Desert
Morello, G.,,,,,,,,,,,,,,,,,,,,,,,,,,,, Ikuta, K., Isogai, K., et al., 2026
Monthly Notices of the Royal Astronomical Society, (01/2026), ADS
17. TESS and ground-based observations of WZ Sge-type dwarf novae in outburst
Tampo, Y., Kojiguchi, N., Isogai, K., Nogami, D.,,,,,,,,,,,,,,,,,,,,,,,,,,,, Ito, J., & Kato, T., 2026
Monthly Notices of the Royal Astronomical Society, 545, staf1964 (01/2026), ADS
16. Sibling sub-Neptunes around sibling M dwarfs: TOI-521 and TOI-912
Lacedelli, G.,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Isogai, K., et al., 2026
Astronomy and Astrophysics, 705, A260 (01/2026), ADS
15. Multiband Optical Photometric and Spectroscopic Monitoring of the 2024 Flare Event in Transition Blazar OP313
Zhang, T.,,,,,, Murata, K. L.,, Isogai, K., et al., 2025
The Astrophysical Journal, 994, 99 (11/2025), ADS
14. Do Young Suns Produce Frequent, Massive CMEs? Results from Five-year Dedicated Optical Observations of EK Draconis and V889 Hercules
Namekata, K., Maehara, H.,,, Ikuta, K., Nogami, D., & Shibata, K., 2025
The Astrophysical Journal, 993, 80 (11/2025), ADS
13. Prediction of coronal mass ejection transit times using machine learning-assisted drag based model
Dani, T.,,,,,, Nurzaman, M. Z., et al., 2025
Advances in Space Research, 76, 5714 (11/2025), ADS
12. First-ever discovery of a superoutburst in GP Comae Berenices buried in archival data
Kojiguchi, N., Isogai, K., Tampo, Y., Kato, T., Ohnishi, R., Imada, A., & Nogami, D., 2025
Publications of the Astronomical Society of Japan, 77, 1126 (10/2025), ADS
11. The mass of TOI-654 b: A short-period sub-Neptune transiting a mid-M dwarf
Ikuta, K.,,,,,,,,,,,,,,,,,,,,,,,, Isogai, K., et al., 2025
Publications of the Astronomical Society of Japan, 77, 1101 (10/2025), ADS
10. Optical fiber-fed integral-field spectrograph KOOLS-IFU connected to the Seimei telescope
Matsubayashi, K.,,,,,,, Isogai, K., & Ohta, K., 2025
Publications of the Astronomical Society of Japan, 77, 1065 (10/2025), ADS
9. Time evolution of a white-light flare accompanied by probable postflare loops on the M-type dwarf EV Lacertae
Ichihara, S., Nogami, D., et al., 2025
Publications of the Astronomical Society of Japan, 77, 1025 (10/2025), ADS
8. TOI-1743 b, TOI-5799 b, TOI-5799 c, and TOI-6223 b: TESS discovery and validation of four super-Earth to Neptune-sized planets around M dwarfs
Yalçinkaya, S.,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Isogai, K., et al., 2025
Astronomy and Astrophysics, 702, A209 (10/2025), ADS
7. Validation of TESS Planet Candidates with Multicolor Transit Photometry and TRICERATOPS+
Gomez Barrientos, J.,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Isogai, K., et al., 2025
The Astronomical Journal, 170, 148 (09/2025), ADS
6. ASASSN-24hd: A dwarf nova bridging WZ Sge-type and SU UMa-type superoutbursts
Tampo, Y., Kojiguchi, N., Kato, T., Kimura, M.,,,, Muraoka, K., Nogami, D., et al., 2025
Publications of the Astronomical Society of Japan, 77, 823 (08/2025), ADS
5. Spectral evolution of the narrow emission-line components in optical during the 2022 nova eruption of U Scorpii
Muraoka, K., Kojiguchi, N., Ito, J., Nogami, D., Kato, T., Tampo, Y.,, Isogai, K., et al., 2025
Publications of the Astronomical Society of Japan, 77, 646 (08/2025), ADS
4. AGN outflows and their properties in Mrk 766 as revealed by KOOLS-IFU on the Seimei Telescope
Oh, K.,,,, Isogai, K., et al., 2025
Publications of the Astronomical Society of Japan, 77, 562 (06/2025), ADS
3. Tidally Heated Sub-Neptunes, Refined Planetary Compositions, and Confirmation of a Third Planet in the TOI-1266 System
Greklek-McKeon, M.,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Isogai, K., et al., 2025
The Astronomical Journal, 169, 292 (06/2025), ADS
2. High-time-cadence Spectroscopy and Photometry of Stellar Flares on M-dwarf YZ Canis Minoris with Seimei Telescope and TESS. II. Statistical Properties of Blue/Red Asymmetries in the Hα Line
Kajikiya, Y.,,,,,, & Nogami, D., 2025
The Astrophysical Journal, 985, 136 (05/2025), ADS
１． Smart Kanata: A framework for autonomous decision-making in rapid follow-up observations of cataclysmic variables
Uemura, M.,,,,,, Kato, T., Nogami, D., Isogai, K., Kojiguchi, N.,, Tampo, Y., et al., 2025
Publications of the Astronomical Society of Japan, 77, 219 (04/2025), ADS
2. Spectroscopic confirmation of TCP J05384230+7051377 as a WZ Sge-type dwarf nova
Hoke, H., Isogai, K., & Tampo, Y., 2025
The Astronomer's Telegram, 17485, 1 (11/2025), ADS
1. Spectroscopic and photometric confirmation of TCP J22135399+3015357 as a WZ Sge-type dwarf nova
Isogai, K., et al, 2025
The Astronomer's Telegram, 17347, 1 (08/2025), ADS
18. SN 2021foa: the bridge between SN IIn and Ibn
A. Gangopadhyay,,, K. Isogai, 2025
MNRAS, 537, 2898 (03/2025), ADS
17. Spectral evolution of the narrow emission line components in optical during the 2022 nova eruption of U Scorpii
K. Muraoka, N. Kojiguchi,, D. Nogami, T. Kato,, K. Isogai, et al., 2025
PASJ in press (arXiv:2503.20559) (03/2025), ADS
16. The possible long-term periodic variability of the extremely luminous quasar WISE J090924.01+000211.1
T. Horiuchi,, K. L. Murata, K. Isogai, et al., 2025
PASJ, 77, 193 (02/2025), ADS
15. TOI-2015b: a sub-Neptune in strong gravitational interaction with an outer non-transiting planet
K. Barkaoui,, K. Isogai, et al., 2025
A&A in press (arXiv:2502.07074) (02/2025), ADS
14. Smart Kanata: A framework for autonomous decision-making in rapid follow-up observations of cataclysmic variables
M. Uemura,,T. Kato, D. Nogami, K. Isogai, N., Kojiguchi, et al., 2025
PASJ in press (02/2025), ADS
13. High-time-cadence Spectroscopy and Photometry of Stellar Flares on M dwarf YZ Canis Minoris with the Seimei Telescope and TESS. I. Discovery of Rapid and Short-duration Prominence Eruptions
Y. Kajikiya,,,D. Nogami, 2025
ApJ, 979, 93 (01/2025), ADS
12. MASTER OT J030227.28+191754.5: An unprecedentedly energetic dwarf nova outburst
Y. Tampo, T. Kato, K. Isogai,, N. Kojiguchi, D. Nogami,,,, K. L. Murata, et al, 2024
PASJ, 76, 1228 (12/2024), ADS
11. Novel transmission gratings with large angular dispersion, high-efficiency, and wide spectral bandwidth
N. Ebizuka,,, Isogai, et al., 2024
SPIE, 13100, 131005O (08/2024), ADS
10. Evidence for bipolar explosions in Type IIP supernovae
T. Nagao,,, K. Isogai, et al., 2024
A&A, 687, L17 (07/2024), ADS
9. Migration and Evolution of giant ExoPlanets (MEEP). I. Nine Newly Confirmed Hot Jupiters from the TESS Mission
J. Schulte,,, K. Isogai, et al., 2024
AJ, 168, 32 (07/2024), ADS
8. Detection of an Earth-sized exoplanet orbiting the nearby ultracool dwarf star SPECULOOS-3
M. Gillon,,, K. Isogai, et al., 2024
Nature Astronomy, 8, 865 (07/2024), ADS
7. Correction to: Simultaneous multicolour transit photometry of hot Jupiters HAT-P-19b, HAT-P-51b, HAT-P-55b, and HAT-P-65b
H. Kang,,, K. Isogai, et al., 2024
MNRAS, 531, 4929 (07/2024), ADS
6. The Discovery and Follow-up of Four Transiting Short-period Sub-Neptunes Orbiting M Dwarfs
Y. Hori,,, K. Isogai, et al., 2024
AJ, 167, 289 (06/2024), ADS
5. Gliese 12 b: A Temperate Earth-sized Planet at 12 pc Ideal for Atmospheric Transmission Spectroscopy
M. Kuzuhara,,, K. Isogai, et al., 2024
ApJL, 967, L21 (06/2024), ADS
4. TOI-663: A newly discovered multi-planet system with three transiting mini-Neptunes orbiting an early M star
M. Cointepas,,, K. Isogai, et al., 2024
A&A, 685, A19 (05/2024), ADS
3. Multiwavelength observation of an active M-dwarf star EV Lacertae and its stellar flare accompanied by a delayed prominence eruption
S. Inoue,,, D. Nogami, et al., 2024
PASJ, 76, 175 (04/2024), ADS
2. Evolution of accretion disk structure of the black hole X-ray binary MAXI J1820+070 during the rebrightening phase
T. Yoshitake,,, D. Nogami, K. L. Murata,, K. Isogai, et al., 2024
PASJ, 76, 251 (04/2024), ADS
1. Optical and soft X-ray light-curve analysis during the 2022 eruption of U Scorpii: Structural changes in the accretion disk
K. Muraoka, N. Kojiguchi,, D. Nogami, T. Kato,,, K. Isogai, et al., 2024
PASJ, 76, 293 (04/2024), ADS (Erratum)
1. Spectroscopic and photometric confirmation of TCP J00003597+1757408 as a WZ Sge-type dwarf nova
K. Isogai, N. Kojiguchi, Y. Tampo, F.-J. Hambush,
2024, The Astronomer's Telesgram #16694, ADS
7. A search for extragalactic fast optical transients in the Tomo-e Gozen high-cadence survey
K. Oshikiri,,, Y. Tampo, et al., 2024,
MNRAS, Volume 527, Issue 1, pp.334-345 (January 2024), ADS
6. Spectra of V1405 Cas at the Very Beginning Indicate a Low-mass ONeMg White Dwarf Progenitor
K. Taguchi,,, K. Isogai, M. Shibata, Y. Tampo, N. Kojiguchi, D. Nogami, T. Kato, et al., 2023,
ApJ, Volume 958, Issue 2, id.156, 12 pp (December 2023), ADS
5. MASTER OT J030227.28+191754.5: A Dwarf Nova at a Massive Oxygen-Neon White Dwarf System?
M. Kimura,,, Y. Tampo, et al., 2023,
ApJ, Volume 951, Issue 2, id.124, 11 pp. (July 2023), ADS
4. Detection of a High-velocity Prominence Eruption Leading to a CME Associated with a Superflare on the RS CVn-type Star V1355 Orionis
S. Inoue,,, K. Namizaki, D. Nogami, et al., 2023,
ApJ, Volume 948, Issue 1, id.9, 13 pp. (May 2023), ADS
3. TOI-1442 b and TOI-2445 b: Two potentially rocky ultra-short period planets around M dwarfs
G. Morello,,, K. Isogai, et al., 2023,
A&A, Volume 673, id.A32, 18 pp. (May 2023), ADS
2. Multicolor and multi-spot observations of Starlink's Visorsat
T. Horiuchi,,, D. Nogami, Y, Tampo, N. Kojiguchi, et al., 2023
Accepted by PASJ (April 2023), ADS
1. 2021 superoutburst of WZ Sge-type dwarf nova V627 Pegasi lacks an early superhump phase
Y. Tampo, T. Kato, N. Kojiguchi,,, M. Shibata, J. Ito,,, D. Nogami, 2023
PASJ, Volume 75, Issue 3, pp.619-633 (June 2023), ADS
12. The 2022 active state of the AM CVn star NSV 1440
T. Kato, R. Stubbings, 2023
Variable Star Bulletin #116, ADS
11. Eclipse observations of V838 Her (Nova Her 1991) during nova eruption
T. Kato, 2023
Variable Star Bulletin #115, ADS
10. SDSS J094002.56+274942.0: an SU UMa star with an orbital period of3.92 hours and an apparently unevolved secondary
T. Kato, T. Vanmunster, 2023
Variable Star Bulletin #114, ADS
9. MASTER OT J055845.55+391533.4: SU UMa star with a dip and long rebrightening
T. Kato, et al., 2023
Variable Star Bulletin #113, ADS
8. CM Mic and other ER UMa stars showing standstills
T. Kato and N. Kojiguchi, 2023
Variable Star Bulletin #112, ADS
7. MGAB-V240: 23-min AM CVn star showing both 12-d supercycle and standstills
T. Kato, 2023
Variable Star Bulletin #111, ADS
6. On the orbital period of the dwarf nova CW Mon
T. Kato and Franz-Josef Hambsch, 2023
Variable Star Bulletin #110, ADS
5. ASASSN-15cm: an SU UMa star with an orbital period of 5.0 hours
T. Kato, 2023
Variable Star Bulletin #109, ADS
4. Genuine standstill in the AM CVn star CR Boo
T. Kato, et al., 2023
Variable Star Bulletin #107, ADS
3. SU UMa-type supercycle in the IW And-type dwarf nova BO Cet above the period gap
T. Kato, 2023
Variable Star Bulletin #106, ADS
2. LS And: WZ Sge-type outburst first time since the 1971 discovery
T. Kato, 2023
Variable Star Bulletin #105, ADS
1. Very low state in PY Per in 2022
T. Kato, 2023
Variable Star Bulletin #104, ADS
1. 史上最大質量の超高速恒星プロミネンス噴出―せいめい望遠鏡が捉えた極限宇宙天気現象― 京都大学HP
12. A Superflare on YZ Canis Minoris Observed by the Seimei Telescope and TESS: Red Asymmetry of Hα Emission Associated with White-light Emission
K. Namizaki, K. Namekata, H. Maehara, et. al., 2023
ApJ, Volume 945, Issue 1, id.61, 9 pp. (March 2023), ADS
11. SN 2020uem: a Possible Thermonuclear Explosion within a Dense Circumstellar Medium (II). The Properties of the CSM from Polarimetry and Light-curve Modeling
K. Uno,,, K. Isogai, et al., 2023
ApJ, Volume 944, Issue 2, id.204, 13 pp. (February 2023)
10. SN 2020uem: a Possible Thermonuclear Explosion within a Dense Circumstellar Medium. I. The Nature of Type IIn/Ia-CSM SNe from Photometry and Spectroscopy
K. Uno,,, K. Isogai, et al., 2023
ApJ, Volume 944, Issue 2, id.203, 17 pp. (February 2023)
9. Comprehensive coverage of particle acceleration and kinetic feedback from the stellar mass black hole V404 Cygni
R.P. Fender,,, K. Isogai, T. Kato, 2023
MNRAS, Volume 518, Issue 1, pp.1243-1259 (January 2023)
8. PNV J00444033+4113068: early superhumps with 0.7 mag amplitude and non-red color
Y. Tampo, K. Isogai, N. Kojiguchi,,, T. Kato,,, J. Ito, D. Nogami, 2022b
PASJ, Volume 74, Issue 6, pp.1287-1294 (December 2022), ADS
7. Validation and atmospheric exploration of the sub-Neptune TOI-2136b around a nearby M3 dwarf
K. Kawauchi,,, K. Isogai, et al., 2022
A&A, Volume 666, id.A4, 19 pp. (October 2022), ADS
6. TESS Hunt for Young and Maturing Exoplanets (THYME). VII. Membership, Rotation, and Lithium in the Young Cluster Group-X and a New Young Exoplanet
E.R. Newton,,, K. Isogai, et al., 2022
AJ, Volume 164, Issue 3, id.115, 23 pp. (September 2022), ADS
5. The TESS-Keck Survey. XIII. An Eccentric Hot Neptune with a Similar-mass Outer Companion around TOI-1272
M.G. MacDougall,,, K. Isogai, et al., 2022
AJ, Volume 164, Issue 3, id.97, 14 pp. (September 2022), ADS
4. Multiwavelength observations of the black hole X-ray binary MAXI J1820+070 in the rebrightening phase
T. Yoshitake,,, D. Nogami, et al., 2022
PASJ, Volume 74, Issue 4, pp.805-814 (August 2022), ADS
3. TOI-1696: A Nearby M4 Dwarf with a 3 R⊕ Planet in the Neptunian Desert
M. Mori,,, K. Isogai, et al., 2022
AJ, Volume 163, Issue 6, id.298, 19 pp. (June 2022), ADS
2. A Possible Alignment Between the Orbits of Planetary Systems and their Visual Binary Companions
F. Christian,,, K. Isogai, et al., 2022
AJ, Volume 163, Issue 5, id.207, 26 pp. (May 2022), ADS
1. Spectroscopic Observations of V455 Andromedae Superoutburst in 2007: the Most Exotic Spectral Features in Dwarf Nova Outbursts
Y. Tampo, D. Nogami, T. Kato, et. al., 2022a
PASJ, Volume 74, Issue 2, pp.460-476 (April 2022), ADS
13. Analysis of TESS observations of V844 Her during the 2020 superoutburst
T. Kato, 2022
Variable Star Bulletin #102, ADS
12. Negative superhumps in the eclipsing Z Cam + VY Scl star ES Dra
T. Kato, 2022
Variable Star Bulletin #101, ADS
11. Z Cam star PY Per in SU UMa state?
T. Kato, 2022
Variable Star Bulletin #100, ADS
10. Gaia19bxc: possible polar below the period minimum
T. Kato, 2022
Variable Star Bulletin #99, ADS
9. Romanov V48: unusual intermediate polar in the period gap
T. Kato and Filipp D. Romanov, 2022
Variable Star Bulletin #98, ADS
8. Gaia22ayj: outburst from a deeply eclipsing 9.36-min binary?
T. Kato, 2022
Variable Star Bulletin #97, ADS
7. WFI J161953.3+031909: eclipsing ER UMa-type and Z Cam-type star in the period gap
T. Kato, 2022
Variable Star Bulletin #96, ADS
6. V476 Cyg (Nova Cyg 1920) is currently a dwarf nova ― first such an object in the period gap?
T. Kato, 2022
Variable Star Bulletin #95, ADS
5. Long-lasting standstill and fading episode in the IW And star V507 Cyg
T. Kato and Masayuki Moriyama, 2022
Variable Star Bulletin #94, ADS
4. On the identity of Tsesevich’s “YY Dra”
T. Kato and Elena P. Pavlenko, 2022
Variable Star Bulletin #93, ADS
3. Analysis of the IW And star ASAS J071404+7004.3
T. Kato,,, Y. Tampo, N. Kojiguchi, M. Shibata, Y. Wakamatsu, et al., 2022
Variable Star Bulletin #92, ADS
2. Emerging ordinary superhumps as the standard candle for WZ Sge stars
T. Kato, 2022
Variable Star Bulletin #90, ADS
1. Evolution of short-period cataclysmic variables: implications from eclipse modeling and stage A superhump method (with New Year’s gift)
T. Kato, 2022
Variable Star Bulletin #89, ADS
13. TOI-530b: a giant planet transiting an M-dwarf detected by TESS
T. Gan,,, K. Isogai, et al., 2023
MNRAS, Volume 511, Issue 1, pp.83-99 (March 2022), ADS
12. Constraining the evolution of cataclysmic variables via the masses and accretion rates of their underlying white dwarfs
A.F. Pala,,, D. Nogami, et al., 2023
MNRAS, Volume 510, Issue 4, pp.6110-6132 (March 2022), ADS
11. TOI-2285b: A 1.7 Earth-radius planet near the habitable zone around a nearby M dwarf
A. Fukui,,, K. Isogai, et al., 2023
PASJ, Volume 74, Issue 1, pp.L1-L8 (February 2022), ADS
10. Discovery of a Long-duration Superflare on a Young Solar-type Star EK Draconis with Nearly Similar Time Evolution for Hα and White-light Emissions
K. Namekata, et. al., 2022
ApJL, Volume 926, L5
9. Probable detection of an eruptive filament from a superflare on a solar-type star
K. Namekata, et. al., 2022
Nature Astronomy, 6, 241
8. Discovery of the Fastest Early Optical Emission from Overluminous SN Ia 2020hvf: A Thermonuclear Explosion within a Dense Circumstellar Environment
K. Uno,,, K. Isogai, et al., 2021
ApJL, Volume 923, Issue 1, id.L8, 14 pp. (December 2021), ADS
7. New candidates for AM Canum Venaticorum stars among ASAS-SN transients
T. Kato, N. Kojiguchi, 2021
PASJ, Volume 73, Issue 5, pp.1375-1381 (October 2021), ADS
6. Intermediate luminosity type Iax supernova 2019muj with narrow absorption lines: Long-lasting radiation associated with a possible bound remnant predicted by the weak deflagration model
M. Kawabata,,, K. Isogai, et al., 2021
PASJ, Volume 73, Issue 5, pp.1295-1314 (October 2021), ADS
5. ASASSN-18aan: An eclipsing SU UMa-type cataclysmic variable with a 3.6-hr orbital period and a late G-type secondary star
Y. Wakamatsu, et. al., 2021
PASJ, Volume 73, 1209
4. Spectroscopic and photometric observations of dwarf nova superoutbursts by the 3.8 m telescope Seimei and the Variable Star Network
Y. Tampo, et. al., 2021
PASJ, Volume 73, 753
3. New candidates for AM Canum Venaticorum stars among ASAS-SN transients
T, Kato, et. al., 2021
PASJ, Volume 73, 1375
2. BO Ceti: Dwarf nova showing both IW And-type and SU UMa-Type features
T, Kato, et. al., 2021
PASJ, Volume 73, 1280
1. On the nature of the anomalous event in 2021 in the dwarf nova SS Cygni and its multi-wavelength transition
M. Kimura, et. al., 2021
PASJ, Volume 73, 1262
14. Orbital period of the IW And-type star ST Cha
T. Kato, N. Kojiguchi, 2021
Variable Star Bulletin #88, ADS
13. Study of the low-amplitude Z Cam star IX Vel
T. Kato, 2021
Variable Star Bulletin #87, ADS
12. A code for two-dimensional frequency analysis using the Least Absolute Shrinkage and Selection Operator (Lasso) for multidisciplinary use
T. Kato, 2021
Variable Star Bulletin #86, ADS
11. Periodic modulations during a long outburst in V363 Lyr
T. Kato, 2021
Variable Star Bulletin #85, ADS
10. ASASSN-19ax: SU UMa-type dwarf nova with a long superhump period and post-superoutburst rebrightenings
Taichi Kato,,, Y. Tampo, N. Kojiguchi, M. Shibata, J. Ito,,, et al., 2021
Variable Star Bulletin #84, ADS
9. On the nature of embedded precursors in long outbursts of SS Cyg stars as inferred from observations of the IW And star ST Cha
T. Kato and Franz-Josef Hambsch, 2021
Variable Star Bulletin #83, ADS
8. Orbital and spin periods of the candidate white dwarf pulsar ASASSN-V J205543.90+240033.5
T. Kato, et al., 2021
Variable Star Bulletin #81, ADS
7. ASASSN-V J205543.90+240033.5: another white dwarf pulsar?
T. Kato, 2021
Variable Star Bulletin #80, ADS
6. MP Gem: VY Scl-type star, finally
T. Kato, 2021
Variable Star Bulletin #79, ADS
5. MGAB-V859 and ZTF18abgjsdg: ER UMa-type dwarf novae showing standstills
T. Kato and N. Kojiguchi, 2021
Variable Star Bulletin #78, ADS
4. ZTF J185139.81+171430.3 = ZTF18abnbzvx: the second white dwarf pulsar?
T. Kato and N. Kojiguchi, 2021
Variable Star Bulletin #77, ADS
3. V606 Aql (Nova Aquilae 1899) is now a dwarf nova
T. Kato and N. Kojiguchi, 2021
Variable Star Bulletin #76, ADS
2. On the superhumps and mass ratio of CzeV404
T. Kato, 2021
Variable Star Bulletin #75, ADS
1. Optical Variability Correlated with X-ray Spectral Transition in the Black-Hole Transient ASASSN-18ey = MAXI J1820+070
K. Niijima, M. Kimura, Y. Wakamatsu, T. Kato, D. Nogami, K. Isogai, N. Kojiguchi, R. Ohnishi et al., 2021
Variable Star Bulletin #74, ADS