VERITAS and multiwavelength observations of the BL Lacertae object 1ES 1741+196

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MSantander_VERITAS and Multiwavelength Observations of the BL Lacertae Object 1ES 1741+196_Physics and Astronomy.pdf (699.66 KB)

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2016-05-04

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Oxford University Press

Abstract

We present results from multiwavelength observations of the BL Lacertae object 1ES 1741 + 196, including results in the very high energy gamma-ray regime using the Very Energetic Radiation Imaging Telescope Array System (VERITAS). The VERITAS time-averaged spectrum, measured above 180 GeV, is well modelled by a power law with a spectral index of 2.7 +/- 0.7(stat) +/- 0.2(syst). The integral flux above 180 GeV is (3.9 +/- 0.8(stat) +/- 1.0(syst)) x 10(-8) m(-2) s(-1), corresponding to 1.6 per cent of the Crab nebula flux on average. The multiwavelength spectral energy distribution of the source suggests that 1ES 1741+196 is an extreme-high-frequency-peaked BL Lacertae object. The observations analysed in this paper extend over a period of six years, during which time no strong flares were observed in any band. This analysis is therefore one of the few characterizations of a blazar in a non-flaring state.

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astroparticle physics, relativistic processes, galaxies: individual: 1ES 1741+196=VER J1744+195, SPECTRAL ENERGY-DISTRIBUTIONS, VHE GAMMA-RAYS, X-RAY, LAC OBJECTS, TEV BLAZARS, FERMI, DISCOVERY, TELESCOPE, SWIFT, VARIABILITY, Astronomy & Astrophysics

Citation

Abeysekara, A.U., et al. (2016): VERITAS and Multiwavelength Observations of the BL Lacertae Object 1ES 1741+196. Monthly Notices of the Royal Astronomical Society, 459(3). DOI: https://doi.org/10.1093/mnras/stw664

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http://ir.ua.edu/handle/123456789/5913

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Research and Publications - Department of Physics & Astronomy