Fukazawa Yasushi

J-GLOBAL         Last updated: Dec 7, 2019 at 03:14
Fukazawa Yasushi
Hiroshima University
Research funding number

Published Papers

Acciari, V. A.; Aliu, E.; Arlen, T.; Aune, T.; Bautista, M.; Beilicke, M.; Benbow, W.; Boettcher, M.; Boltuch, D.; Bradbury, S. M. et al.
ASTROPHYSICAL JOURNAL LETTERS   708(2) L100-L106   Jan 2010   [Refereed]
We report the first detection of very high energy(83) (VHE) gamma-ray emission above 140 GeV from PKS 1424+240, a BL Lac object with an unknown redshift. The photon spectrum above 140 GeV measured by VERITAS is well described by a power law with a...
Abdo, A. A.; Ackermann, M.; Ajello, M.; Atwood, W. B.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Bechtol, K. et al.
ASTROPHYSICAL JOURNAL   710(2) 1271-1285   Feb 2010   [Refereed]
The gamma-ray energy spectra of bright blazars of the LAT Bright AGN Sample LBAS) are investigated using Fermi-LAT data. Spectral properties hardness, curvature, and variability) established using a data set accumulated over 6 months of operation ...
Kamae, Tuneyoshi; Andersson, Viktor; Arimoto, Makoto; Axelsson, Magnus; Bettolo, Cecilia Marini; Bjornsson, Claes-Ingvar; Bogaert, Gilles; Carlson, Per; Craig, William; Ekeberg, Tomas et al.
ASTROPARTICLE PHYSICS   30(2) 72-84   Sep 2008   [Refereed]
We describe a new balloon-borne instrument (PoGOLite) capable of detecting 10% polarisation from 200 mCrab point-like sources between 25 and 80 keV in one 6-h flight. Polarisation measurements in the soft gamma-ray band are expected to provide a p...
Nagae, Osamu; Kawabata, Koji S.; Fukazawa, Yasushi; Okazaki, Akira; Isogai, Mizuki; Yamashita, Takuya
ASTRONOMICAL JOURNAL   137(3) 3509-3519   Mar 2009   [Refereed]
We present optical spectropolarimetric observations of three microquasars, Cyg X-1, LS 5039, and LS I +61 degrees 303. Polarimetry can bring us geometrical information on the innermost part of the circumstellar media. For Cyg X-1, the observed con...
Abdo, A. A.; Ackermann, M.; Atwood, W. B.; Baldini, L.; Ballet, J.; Barbiellini, G.; Baring, M. G.; Bastieri, D.; Baughman, B. M.; Bechtol, K. et al.
SCIENCE   322(5905) 1218-1221   Nov 2008   [Refereed]
Energetic young pulsars and expanding blast waves [ supernova remnants (SNRs)] are the most visible remains after massive stars, ending their lives, explode in core-collapse supernovae. The Fermi Gamma- Ray Space Telescope has unveiled a radio qui...