Physics
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....6.2344a&link_type=abstract
Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int
Physics
1
Scientific paper
Signals of diffuse gamma rays from the galactic plane are searched using both the Tibet-II array and high density (HD) array data with mode energy 10 TeV and 3 TeV, respectively. No significant signal is found both from inner Galaxy (IG) for 20° ≤ l ≤ 55° near the galactic center and outer Galaxy (OG) 140° ≤ l ≤ 225° around the anti-galactic center both with |b| ≤ 5° . Then the flux upper limits with 90% c.l. are obtained as 1.30×10-10 cm-2 s-1 sr-1 from IG and 4.05×10-11 cm-2 s-1 sr-1 from OG at 10 TeV, and also 2.34×10-9 cm-2 s-1 sr-1 from IG and 2.24×10-10 cm-2 s-1 sr-1 from OG at 3 TeV, respectively. The present data seem to exclude the inverse Compton model in an extreme case of assumed flat spectrum of power index 2.0 of injected local electrons. Correspondence to: Yamamoto (yamamoto@hep.konan-u.ac.jp)
Amenomori Michihiro
Ayabe S.
Cui Shu-Wen
Ding Lin-Kai
Ding Xue-Yong
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