Energy spectrum of TeV gamma rays from Mrk 501 obtained by stereoscopic analysis

被引：4

作者：

Yamamoto, T ^{[1
]}

Chamoto, N

Chikawa, M

Hayashi, S

Hayashi, Y

Hayashida, N

Hibino, K

Hirasawa, H

Honda, K

Hotta, N

Inoue, N

Ishikawa, F

Ito, N

Kabe, S

Kajino, F

Kashiwagi, T

Kawakami, S

Kawasaki, Y

Kawasumi, N

Kitamura, H

Kuramochi, K

Kusano, E

Lafoux, H

Loh, EC

Matsuyama, T

Mizutani, K

Nagano, M

Nishikawa, D

Nishimura, J

Nishiyama, T

Nishizawa, M

Ouchi, T

Ohoka, H

Ohnishi, M

Saito, T

Sakaki, N

Sakata, M

Sasano, M

Shimodaira, H

Shiomi, A

Sokolsky, P

Takahashi, T

Taylor, SF

Takeda, M

Teshima, M

Torii, R

Tsukiji, M

Uchihori, Y

Yamamoto, Y

Yoshida, S

机构：

[1] Univ Tokyo, Inst Cosm Ray Res, Tokyo, Japan

[2] Osaka City Univ, Dept Phys, Osaka 558, Japan

[3] Konan Univ, Dept Phys, Kobe, Hyogo 658, Japan

[4] Saitama Univ, Dept Phys, Urawa, Saitama 338, Japan

[5] Kanagawa Univ, Dept Engn, Yokohama, Kanagawa, Japan

[6] Yamanashi Univ, Fac Educ, Kofu, Yamanashi 400, Japan

[7] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA

[8] Kobe Univ, Dept Phys, Kobe, Hyogo 657, Japan

[9] Kinki Univ, Sci & Technol Res Inst, Osaka 577, Japan

[10] Natl Lab High Energy Phys, KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan

[11] Ehime Univ, Fac Gen Educ, Matsuyama, Ehime 790, Japan

[12] Utsunomiya Univ, Fac Educ, Utsunomiya, Tochigi 321, Japan

[13] Tokyo Metropolitan Coll Aeronaut Engn, Tokyo, Japan

[14] Natl Ctr Sci Informat Syst, Tokyo, Japan

[15] Iwaki Meisei Univ, Fac Sci & Technol, Tokyo, Japan

[16] Yamagata Acad Technol, Yamagata, Japan

[17] Natl Inst Radiol Sci, Chiba 260, Japan

来源：

ASTROPARTICLE PHYSICS | 1999年 / 11卷 / 1-2期

关键词：

AGN; BL Lacertae objects; Mrk501; gamma rays;

D O I：

10.1016/S0927-6505(99)00038-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have observed flares of TeV-gamma rays from Mrk501 in 1997 using three telescopes of the Utah Seven Telescope Array at Dugway, Utah. Determination of the energy spectrum from such Active Galactic Nuclei (AGN) is very important, because the gamma-ray spectrum is expected to steepen around 10 TeV from objects like Mrk501 by the interaction of the infrared photons. We have developed the method to estimate energies of the gamma rays by stereoscopic analysis using multiple telescopes. The differential index of the energy spectrum obtained is well expressed by -2.5 between 700 GeV and 3 TeV. This spectrum seems to become steeper above several TeV. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：141 / 144

页数：4

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