The VHE SED modelling of Markarian 501 in 2009

Abstract

The high energy blazar, Markarian 501 was observed as a part of multi-instrument and multiwavelength campaign spanning the whole electromagnetic spectrum for 4.5 months during March 15 to August 1, 2009. On May 1, Whipple 10m telescope observed a very strong $\gamma$-ray flare in a time interval of about 0.5 h. Apart from this flare, high state and low state emissions were also observed by Whipple, VERITAS and MAGIC telescopes. Using the photohadronic model and accounting for the absorption of the extragalactic background light (EBL) to these very high energy $\gamma$-rays, excellent fits are obtained for the observed spectra. We have shown that the intrinsic spectrum for low state emission is flat, however, for high and very high states this is a power-law with slowly increasing exponent.

arXiv comment17 pages, 8 figures

References in corpus (22)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The extragalactic optical-infrared background radiations, their time evolution and the cosmic photon-photon opacity
• A theoretical unifying scheme for gamma-ray bright blazars
• Multiwavelength Observations of Strong Flares From the TeV-Blazar 1ES 1959+650
• Fermi Discovery of Gamma-Ray Emission from NGC 1275
• Detection of the cosmic γ-ray horizon from multiwavelength observations of blazars
• Spectral Energy Distribution of Markarian 501: Quiescent State vs. Extreme Outburst
• Hadronic models of blazars require a change of the accretion paradigm
• Probing Acceleration and Turbulence at Relativistic Shocks in Blazar Jets
• Correlated intense X-ray and TeV activity of Mrk~501 in 1998 June
• The time averaged TeV energy spectrum of Mkn 501 of the extraordinary 1997 outburst as measured with the stereoscopic Cherenkov telescope system of HEGRA
• Multiband variability studies and novel broadband SED modeling of Mrk 501 in 2009
• Reanalysis of the high energy cutoff of the 1997 Mkn 501 TeV energy spectrum
• Long-Term X-Ray and TeV variability of Mrk 501
• The Temporal Characteristics of the TeV Gamma-Radiation from Mkn 501 in 1997, I: Data from the Stereoscopic Imaging Atmospheric Cherenkov Telescope System of HEGRA
• Very High Energy outburst of Markarian 501 in May 2009
• The hadronic origin of hard gamma-ray spectrum from blazar 1ES 1101-232
• Multi-TeV flaring from high energy blazars: An evidence of the photohadronic process
• Multi-TeV flaring from blazars: Markarian 421 a case study
• EBL effect on the observation of multi-TeV flaring of 2009 from Markarian 501
• Photohadronic scenario in interpreting the February-March 2014 flare of 1ES 1011+496
• Multi-TeV flaring in nearby High Energy Blazars: A photohadronic scenario

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