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Recent Topics on Very High Energy Gamma-ray Astronomy
Masaki Mori
With the advent of imaging atmospheric Cherenkov telescopes in late 1980's, ground-based observation of TeV gamma-rays came into reality after struggling trials by pioneers for twe…
MITSuME--Multicolor Imaging Telescopes for Survey and Monstrous Explosions
T. Kotani, N. Kawai, K. Yanagisawa +25
Development of MITSuME is reported. Two 50-cm optical telescopes have been built at Akeno in Yamanashi prefecture and at Okayama Astrophysical Observatory (OAO) in Okayama prefectu…
The search for optical emission on and before the GRB trigger with the WIDGET telescope
T. Tamagawa, F. Usui, Y. Urata +11
WIDGET is a robotic telescope for monitoring the HETE-2 field-of-view to detect Gamma-ray Burst optical flashes or possible optical precursors. The system has 62degx62deg wide fiel…
Gamma-ray Spectra due to Cosmic-ray Interactions with Dense Gas Clouds
Michiko Ohishi, Masaki Mori, Mark Walker
Gamma-ray spectra from cosmic-ray proton and electron interactions with dense gas clouds have been calculated using a Monte Carlo event simulation code, GEANT4. Such clouds are pos…
Dense gas clouds and the Unidentified EGRET sources
Mark Walker, Masaki Mori, Michiko Ohishi
Cold, dense gas clouds have been proposed as a major component of the Galactic dark matter; such clouds can be revealed by the gamma-ray emission which arises from cosmic-rays inte…
Development of an atmospheric Cherenkov imaging camera for the CANGAROO-III experiment
S. Kabuki, K. Tsuchiya, K. Okumura +10
A Cherenkov imaging camera for the CANGAROO-III experiment has been developed for observations of gamma-ray induced air-showers at energies from 10 to 10 eV. The came…