Observations of sunspot oscillations in G band and Ca II H line with solar optical telescope on Hinode

Kaori Nagashima, Takashi Sekii, Alexander G. Kosovichev, Hiromoto Shibahashi, Saku Tsuneta, Kiyoshi Ichimoto, Yukio Katsukawa, Bruce Lites, Shin'ichi Nagata, Toshifumi Shimizu, Richard A. Shine, Yoshinori Suematsu, Theodore D. Tarbell, Alan M. Title