Multiwavelength observations of the TeV blazar Mrk 501 in March 1996. The first report of the detection by EGRET

J. Kataoka*, J. R. Mattox, J. Quinn, H. Kubo, F. Makino, T. Takahashi, S. Inoue, R. C. Hartman, G. M. Madejski, P. Sreekumar, S. J. Wagner

*この研究の対応する著者

研究成果: Article査読

14 被引用数 (Scopus)

抄録

We present the results of a multiwavelength campaign for Mrk 501 performed in March 1996 with ASCA, EGRET, Whipple, and optical telescopes. We report here for the first time the detection of a GeV γ-ray flux from Mrk 501 with EGRET with 3.5σ significance (E > 100 MeV). A higher flux was also observed in April/May 1996, with 4.0σ significance for E > 100 MeV, and 5.2σ significance for E > 500 MeV. We find that the multiband spectrum in March 1996 is consistent with that calculated from a one-zone SSC model, except for the extremely 'flat' TeV spectrum. We show that the discrepancy cannot be explained by either second order Comptonization or the contribution of the 'seed' IR photons from the host galaxy.

本文言語English
ページ(範囲)149-151
ページ数3
ジャーナルAstroparticle Physics
11
1-2
DOI
出版ステータスPublished - 1999 6月
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学

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