VERITAS and Multiwavelength Observations of the BL Lacertae Object 1ES 1741+196

Abstract

We present results from multiwavelength observations of the BL Lacertae object 1ES 1741+196, including results in the very-high-energy ${\hat{I}}^3$-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 $2.7\pm 0.7_{\mathrm{stat}}\pm 0.2_{\mathrm{syst}}$. The integral flux above 180 GeV is $(3.9\pm 0.8_{\mathrm{stat}}\pm 1.0_{\mathrm{syst}})\times 10^{-8}$ m${}^{-2}$ s${}^{-1}$, corresponding to 1.6% 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.

8 pages, 5 figures. Accepted for publication in MNRAS