TeV gamma-ray observations of some extragalactic objects with CANGAROO-III

Kyoshi Nishijima, Michiyo Akimoto,Yoshitaka Mizumura,Junko Kushida,Hidetoshi Kubo,Geoffry V. Bicknell,Roger W. Clay,Philip G. Edwards,Ryoji Enomoto,Shuichi Gunji,Satoshi Hara,Tadao Hara,Takahiro Hattori, Sei’ichi Hayashi,Yusuke Higashi, Yasufumi Hirai,Kenji Inoue, Hisanori Ishioka,Shigeto Kabuki,Fumiyoshi Kajino,Hideaki Katagiri,Akiko Kawachi,Tadashi Kifune, Ryuta Kiuchi, Toshiki Kunisawa, Takashi Matoba,Yutaka Matsubara, Ikuma Matsuzawa, Taku Mizukami,Yoshihiko Mizumoto,Masaki Mori,Hiroshi Muraishi,Tsuguya Naito,Takeshi Nakamori, Shintaro Nakano,Michiko Ohishi, Yuhki Ohtake, Shin’ichi Ryoki,Koji Saito,Yukiko Sakamoto, Atsushi Seki,Victor Stamatescu, Toshitaka Suzuki, David L. Swaby,Toru Tanimori,Greg Thornton,Fuyuki Tokanai,Ken’ichi Tsuchiya,Shio Watanabe, Eiichi Yamazaki,Shohei Yanagita,Tatsuo Yoshida,Takanori Yoshikoshi,Yohei Yukawa

semanticscholar（2009）

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Abstract

CANGAROO-III observations of several extragalactic objects have been made since its launch. Here we present the results for two BL Lac objects (H 2356−309 and PKS 2155−304) and one starburst galaxy (M 83). H 2356−309 was observed in July and August 2005. The quality selected data for a total live time of 26 hours are analyzed, and no excess events in the direction of H 2356−309 are found. The upper limit of the gamma-ray flux above 750 GeV is calculated. Observations of M 83 were done in Mar 2005 for 4 nights. No significant excess events was found, and the flux upper limit was obtained above 490 GeV. We have observed the well-known HBL, PKS 2155−304(z = 0.116), for 19 nights from July to September 2008 with the CANGAROO-III telescopes including the multiwavelength campaign periods. No significant excess signal was detected, and the average integral flux upper limit was calculated above 720 GeV.

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