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

doi:10.1016/S0927-6505(99)00040-7

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

14 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 language	English
Pages (from-to)	149-151
Number of pages	3
Journal	Astroparticle Physics
Volume	11
Issue number	1-2
DOIs	https://doi.org/10.1016/S0927-6505(99)00040-7
Publication status	Published - 1999 Jun
Externally published	Yes

ASJC Scopus subject areas

Astronomy and Astrophysics

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10.1016/S0927-6505(99)00040-7

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@article{144f3ea16eb5415e90eb4c0ca0811ccc,

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

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.",

author = "J. Kataoka and Mattox, {J. R.} and J. Quinn and H. Kubo and F. Makino and T. Takahashi and S. Inoue and Hartman, {R. C.} and Madejski, {G. M.} and P. Sreekumar and Wagner, {S. J.}",

year = "1999",

month = jun,

doi = "10.1016/S0927-6505(99)00040-7",

language = "English",

volume = "11",

pages = "149--151",

journal = "Astroparticle Physics",

issn = "0927-6505",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - Multiwavelength observations of the TeV blazar Mrk 501 in March 1996. The first report of the detection by EGRET

AU - Kataoka, J.

AU - Mattox, J. R.

AU - Quinn, J.

AU - Kubo, H.

AU - Makino, F.

AU - Takahashi, T.

AU - Inoue, S.

AU - Hartman, R. C.

AU - Madejski, G. M.

AU - Sreekumar, P.

AU - Wagner, S. J.

PY - 1999/6

Y1 - 1999/6

N2 - 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.

AB - 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.

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U2 - 10.1016/S0927-6505(99)00040-7

DO - 10.1016/S0927-6505(99)00040-7

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SN - 0927-6505

VL - 11

SP - 149

EP - 151

JO - Astroparticle Physics

JF - Astroparticle Physics

IS - 1-2

ER -

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

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