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

TL;DR

This study presents multiwavelength observations of the BL Lac object 1ES 1741+196, including VERITAS gamma-ray data, revealing its spectral characteristics and confirming its classification as an extreme-high-frequency-peaked BL Lac object during a non-flaring state.

Contribution

First multi-year multiwavelength characterization of 1ES 1741+196 in a non-flaring state, including detailed VHE gamma-ray spectrum analysis.

Findings

VERITAS spectrum fits a power law with index 2.7

Integral flux above 180 GeV is 1.6% of Crab flux

No significant flares observed over six years

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 $2.7\pm0.7_{\mathrm{stat}}\pm0.2_{\mathrm{syst}}$. The integral flux above 180 GeV is $(3.9\pm0.8_{\mathrm{stat}}\pm1.0_{\mathrm{syst}})\times 10^{-8}$ 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.