Matsui, R., Uemura, M., Arai, A., Sasada, M., Ohsugi, T., Yamashita, T., ...
We report on optical and infrared photometric observations of a WZ Sge-type dwarf nova, V455 And during a superoutburst in 2007. These observations were performed with the KANATA (V, J, and K_s...
Early phase observations of extremely luminous Type Ia Supernova 2009dc (2009)
Yamanaka, M., Kawabata, K. S., Kinugasa, K., Tanaka, M., Imada, A., Maeda, K., ...
We present early phase observations in optical and near-infrared wavelengths for the extremely luminous Type Ia supernova (SN Ia) 2009dc. The decline rate of the light curve is $\Delta...
Simultaneous MITSuME gRI monitoring of S5 0716+714 (2009)
Stalin, C. S., Kawabata, K. S., Uemura, M., Yoshida, M., Kawai, N., Yanagisawa, K., ...
We present results of our intra-night optical flux monitoring observations of S5 0716+714 done simultaneously in gRI filters. The observations were done using Multicolor Imaging Telescopes for Survey...
A unique core-collapse supernova in an elliptical galaxy (2009)
Kawabata, K. S., Maeda, K., Nomoto, K., Taubenberger, S., Tanaka, M., Hattori, T., ...
We report on our discovery and observations of a very unique supernova, SN 2005cz, that exhibits previously unknown properties. The early-phase spectrum of this supernova (SN) is similar to those of...
Outburst of a WZ Sge-type dwarf nova, AL Com in 2007 (2008)
Uemura, M., Arai, A., Sasada, M., Schmeer, P., Miller, I., Ohsugi, T., ...
We report photometric observations of AL Com during its rare outburst in 2007. The light curve is reminiscent of its past superoutbursts in 1995 and 2001, except for the rebrightening phase after the...
The evolution of the peculiar type Ia supernova SN 2005hk over 400 days (2008)
Sahu, D. K., Tanaka, Masaomi, Anupama, G. C., Kawabata, K. S., Maeda, Keiichi, Tominaga, Nozomu, ...
The peculiar type Ib supernova 2006jc: a WCO Wolf-Rayet star explosion (2008)
Tominaga, N., Limongi, M., Suzuki, T., Tanaka, M., Nomoto, K., Maeda, K., ...
The Peculiar Type Ib Supernova 2006jc: A WCO Wolf-Rayet Star Explosion (2007)
Tominaga, N., Limongi, M., Suzuki, T., Tanaka, M., Nomoto, K., Maeda, K., ...
We present a theoretical model for Type Ib supernova (SN) 2006jc. We calculate the evolution of the progenitor star, hydrodynamics and nucleosynthesis of the SN explosion, and the SN bolometric light...
Uemura, M., Arai, A., Krajci, T., Pavlenko, E., Shugarov, S. Yu., Katysheva, N. A., ...
Several SU UMa-type dwarf novae, in particular, WZ Sge-type stars tend to exhibit rebrightenings after superoutbursts. The rebrightening phenomenon is problematic for the disk instability theory of...
Kawabata, K. S., Ikeda, Y., Akitaya, H., Isogai, M., Matsuda, K., Matsumura, M., ...
We present an extended optical spectropolarimetry of R CrB from 1998 January to 2003 September. The polarization was almost constant in the phase of maximum brightness, being consistent with past...
SN 2005cs in M51 I. The first month of evolution of a subluminous SN II plateau (2006)
Pastorello, A., Sauer, D., Taubenberger, S., Mazzali, P. A., Nomoto, K., Kawabata, K. S., ...
Early time optical observations of supernova (SN) 2005cs in the Whirlpool Galaxy (M51), are reported. Photometric data suggest that SN 2005cs is a moderately under-luminous Type II plateau supernova...
SN 2005cs in M51 – I. The first month of evolution of a subluminous SN II plateau (2006)
Pastorello, A., Sauer, D., Taubenberger, S., Mazzali, P. A., Nomoto, K., Kawabata, K. S., ...
An Asymmetric, Energetic Type Ic Supernova Viewed Off-Axis, and a Link to Gamma-Ray Bursts (2005)
Mazzali, P. A., Kawabata, K. S., Maeda, K., Nomoto, K., Filippenko, A. V., Ramirez-Ruiz, E., ...
Type Ic supernovae, the explosions following the core collapse of massive stars that have previously lost their hydrogen and helium envelopes, are particularly interesting because of the link with...
Deng, J., Kawabata, K. S., Ohyama, Y., Nomoto, K., Mazzali, P. A., Wang, L., ...
Optical spectroscopy of the Type Ia supernova SN 2002ic obtained on 2003 June 27.6 UT, i.e., about 222 rest-frame days after explosion, is presented. Strong H emission indicates an interaction...
The Type Ic Hypernova SN 2003dh/GRB 030329 (2003)
Mazzali, P. A., Deng, J., Tominaga, N., Maeda, K., Nomoto, K., Matheson, T., ...
The spectra of SN 2003dh, identified in the afterglow of GRB030329, are modeled using radiation transport codes. It is shown that SN 2003dh had a high explosion kinetic energy ($\sim 4 \times...
On The Spectrum and Spectropolarimetry of Type Ic Hypernova SN 2003dh/GRB 030329 (2003)
Kawabata, K. S., Deng, J., Wang, L., Mazzali, P., Nomoto, K., Maeda, K., ...
Spectroscopic and spectropolarimetric observations of SN 2003dh/GRB 030329 obtained in 2003 May using the Subaru 8.2 m telescope are presented. The properties of the SN are investigated through a...
Ohyama, Y., Taniguchi, Y., Kawabata, K. S., Shioya, Y., Murayama, T., Nagao, T., ...
We present deep optical spectroscopy of an extended Ly$\alpha$ emission-line blob located in an over-dense region at redshift $z \approx 3.1$; `blob 1' of Steidel et al. (2000). The origin of such...
A New High-Redshift Lyman alpha Emitter: Possible Superwind Galaxy at z = 5.69 (2002)
Ajiki, M., Taniguchi, Y., Murayama, T., Nagao, T., Veilleux, S., Shioya, Y., ...
During the course of our deep optical imaging survey for Ly alpha emitters at z approximately 5.7 in the field around the z=5.74 quasar SDSSp J104433.04-012502.2, we have found a candidate strong...
Optical Spectropolarimetry of SN 2002ap: High Velocity Asymmetric Explosion (2002)
Kawabata, K. S., Jeffery, D. J., Iye, M., Ohyama, Y., Kosugi, G., Kashikawa, N., ...
We present spectropolarimetry of the Type Ic supernova SN 2002ap and give a preliminary analysis: the data were taken at two epochs, close to and one month later than the visual maximum (2002...
The Type Ic Hypernova SN 2002ap (2002)
Mazzali, P. A., Deng, J., Maeda, K., Nomoto, K., Umeda, H., Hatano, K., ...
Photometric and spectroscopic data of the energetic Type Ic supernova (SN) 2002ap are presented, and the properties of the SN are investigated through models of its spectral evolution and its light...