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Subaru Deep Survey I. Near-Infrared Observations
T. Maihara, F. Iwamuro, H. Tanabe +30
Deep near-infrared images of a blank 2'x2' section of sky near the Galactic north pole taken by Subaru Telescope are presented. The total integration times of the J and K' bands ar…
Forming Clusters of Galaxies as the Origin of Unidentified GeV Gamma-Ray Sources
Tomonori Totani, Tetsu Kitayama
Over half of GeV gamma-ray sources observed by the EGRET experiment have not yet been identified as known astronomical objects. There is an isotropic component of such unidentified…
Precessing jets interacting with interstellar material as the origin for the light curves of gamma-ray bursts
Simon Portegies Zwart, Tomonori Totani
We present an internal shock model with external characteristics for explaining the complicated light curves of gamma-ray bursts. Shocks produce gamma-rays in the interaction betwe…
Dust versus Supernova Cosmology
Tomonori Totani
Here we present some critical discussions about the systematic uncertainty by dust extinction in the recent cosmological results of high-redshift Type Ia supernovae. First we argue…
An Interpretation of the Evidence for TeV Emission from Gamma-Ray Burst 970417a
Tomonori Totani
The Milagrito collaboration recently reported evidence for emission of very high energy gamma-rays in the TeV range from one of the BATSE GRBs, GRB 970417a. Here I discuss possible…
Unavoidable Selection Effects in the Analysis of Faint Galaxies in the Hubble Deep Field: Probing the Cosmology and Merger History of Galaxies
Tomonori Totani, Yuzuru Yoshii
(Abridged) We present a detailed analysis of the number count and photometric redshift distribution of faint galaxies in the Hubble Deep Field (HDF), paying a special attention to…