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

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)149-151
Number of pages3
JournalAstroparticle Physics
Volume11
Issue number1-2
DOIs
Publication statusPublished - 1999 Jun
Externally publishedYes

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Fingerprint Dive into the research topics of 'Multiwavelength observations of the TeV blazar Mrk 501 in March 1996. The first report of the detection by EGRET'. Together they form a unique fingerprint.

Cite this