431 citations · 713 across the 10 of their papers we have counts for
5 papers · 1 filter
Detectors for Cosmic Rays on Ground and in Space
Hiroyasu Tajima
The origin of the cosmic rays has been a great mystery since they were discovered by Victor Hess in 1912. AGASA's observation of ultra-high-energy cosmic-rays (UHECR) possibly beyo…
PoGOLite - A High Sensitivity Balloon-Borne Soft Gamma-ray Polarimeter
Tuneyoshi Kamae, Viktor Andersson, Makoto Arimoto +36
We describe a new balloon-borne instrument (PoGOLite) capable of detecting 10% polarisation from 200mCrab point-like sources between 25 and 80keV in one 6 hour flight. Polarisation…
Studies of Cosmic Rays with GeV Gamma Rays
Hiroyasu Tajima, Tuneyoshi Kamae, Stefano Finazzi +2
We describe the role of GeV gamma-ray observations with GLAST-LAT (Gamma-ray Large Area Space Telescope - Large Area Telescope) in identifying interaction sites of cosmic-ray proto…
Studies of EGRET sources with a novel image restoration technique
Hiroyasu Tajima, Stefano Finazzi, Johann Cohen-Tanugi +2
We have developed an image restoration technique based on the Richardson-Lucy algorithm optimized for GLAST-LAT image analysis. Our algorithm is original since it utilizes the PSF…
Measuring energy dependent polarization in soft gamma-rays using Compton scattering in PoGOLite
M. Axelsson, O. Engdegård, F. Ryde +23
Linear polarization in X- and gamma-rays is an important diagnostic of many astrophysical sources, foremost giving information about their geometry, magnetic fields, and radiation…