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Detection of Polarimetric Variations Associated with the Shortest Time-Scale Variability in S5 0716714
Mahito Sasada, Makoto Uemura, Akira Arai +7
We present the result of near-infrared and optical observations of the BL Lac object S5 0716714 carried out by the KANATA telescope. S5 0716714 has both a long term high-…
Science with UT's Dichroic-Mirror Camera (DMC), 15-band simultaneous imager
Hanindyo Kuncarayakti, Mamoru Doi, Hakim L. Malasan +20
We introduce the Dichroic-Mirror Camera (DMC), an instrument developed at the University of Tokyo which is capable of performing simultaneous imaging in fifteen bands. The main fea…
No Evidence for Variability of Intervening Absorption Lines toward GRB 060206: Implications for the Mg II Incidence Problem
Kentaro Aoki, Tomonori Totani, Takashi Hattori +6
We examine variability of absorption line strength of intervening systems along the line of sight to GRB 060206 at , by the low-resolution optical spectra obtained by the…
The 2006 November outburst of EG Aquarii: the SU UMa nature revealed
Akira Imada, Rod Stubbings, Taichi Kato +32
We report time-resolved CCD photometry of the cataclysmic variable EG Aquarii during the 2006 November outburst During the outburst, superhumps were unambiguously detected with a m…
Outburst of a WZ Sge-type dwarf nova, AL Com in 2007
M. Uemura, A. Arai, M. Sasada +8
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 rebrighten…
Asphericity in Supernova Explosions from Late-Time Spectroscopy
Keiichi Maeda, Koji Kawabata, Paolo A. Mazzali +15
Core-collapse supernovae (CC-SNe) are the explosions that announce the death of massive stars. Some CC-SNe are linked to long-duration gamma-ray bursts (GRBs) and are highly aspher…