Possible >10GeV Particle Detection in Association with the 28 May 2003 Solar Flare Sako, T. ; Muraki, Y. ; Masuda, S. ; Matsubara, Y. ; Watanabe, K. ; Menjo, H. ; Tsuchiya, H. ; Sakai, T. ; Shibata, S. ; Ogasawara, R. ; Mizumoto, Y. ; Kakgiri, M. ; Miyashita, A. Abstract Publication: 29th International Cosmic Ray Conference (ICRC29), Volume 1 Pub Date: 2005 Bibcode: 2005ICRC....1...21S