Multiwavelength observation of the blazar 1ES1426+428 in May-June 2008

TL;DR

This paper reports on a comprehensive multiwavelength observational campaign of the blazar 1ES1426+428 in 2008, covering optical, X-ray, and very high energy gamma-ray bands, revealing flux variations and setting upper limits on gamma-ray emission.

Contribution

It provides the first simultaneous multiwavelength data set for 1ES1426+428 during 2008, including optical, X-ray, and gamma-ray observations, and constructs a detailed spectral energy distribution.

Findings

Optical flux increased by 20% during observations.

X-ray data indicated an intermediate activity state.

No significant gamma-ray emission detected; flux upper limits established.

Abstract

We present the results of the multiwavelength observation of the high frequency-peaked BL Lac object 1ES1426+428 carried in May-June 2008 with the KVA telescope for the optical band, the Swift and Suzaku satellites for the X-ray band and the MAGIC telescope for the very high energy band (E>100 GeV). The optical flux increased by 20% during the observation, while X-ray data show that the source was in an intermediate state of activity. MAGIC did not detect a significant gamma-ray emission from the source, so we report flux Upper Limit at 95% CL for energies above 130 GeV. A Spectral Energy Distribution is also obtained combining the data from the 2008 campaign with the historical ones.