62 citations · 141 across the 4 of their papers we have counts for
7 papers
Si and Fe depletion in Galactic star-forming regions observed by the Spitzer Space Telescope
Yoko Okada, Takashi Onaka, Takashi Miyata +4
We report the results of the mid-infrared spectroscopy of 14 Galactic star-forming regions with the high-resolution modules of the Infrared Spectrograph (IRS) on board the Spitzer…
Testing the External Shock Model of Gamma-Ray Bursts using the Late-Time Simultaneous Optical and X-ray Afterglows
Yuji Urata, Ryo Yamazaki, Takanori Sakamoto +21
We study the ``normal'' decay phase of the X-ray afterglows of gamma-ray bursts (GRBs), which follows the shallow decay phase, using the events simultaneously observed in the R-ban…
The Asymmetric Thermal Emission of Protoplanetary Disk Surrounding HD 142527 Seen by Subaru/COMICS
Hideaki Fujiwara, Mitsuhiko Honda, Hirokazu Kataza +8
Mid-infrared (MIR) images of the Herbig Ae star HD 142527 were obtained at 18.8 and 24.5 micron with the Subaru/COMICS. Bright extended arc-like emission (outer disk) is recognized…
Multi-color Shallow Decay and Chromatic Breaks in the GRB 050319 Optical Afterglow
K. Y. Huang, Y. Urata, P. H. Kuo +19
Multi-wavelength B, V, R, I observations of the optical afterglow of GRB 050319 were performed by the 1.05-m telescope at Kiso Observatory and the 1.0-m telescope at Lulin Observat…
Crystalline Silicate Feature of the Vega-like star HD145263
Mitsuhiko Honda, Hirokazu Kataza, Yoshiko K. Okamoto +8
We have observed the 8-13 m spectrum (R250) of the Vega-like star candidate HD145263 using Subaru/COMICS. The spectrum of HD145263 shows the broad trapezoidal silicate fea…
Early (0.3 day) R-band light curve of the optical afterglow of GRB030329
Y. Urata, T. Miyata, S. Nishiura +13
We observed the optical afterglow of the bright gamma-ray burst GRB030329 on the nights of 2003 March 29, using the Kiso observatory (the University of Tokyo) 1.05 m Schmidt telesc…