Highlights of Recent Multiwavelength Observations of VHE Blazars with VERITAS
J. Grube (for the VERITAS collaboration)
TL;DR
This paper reports on long-term multiwavelength observations of VHE blazars with VERITAS, revealing significant flux and spectral variability, and a strong correlation between X-ray and gamma-ray emissions in certain sources.
Contribution
It provides new insights into the variability and emission mechanisms of VHE blazars through coordinated multiwavelength observations.
Findings
Strong flux and spectral variability in Mrk 421
X-ray and gamma-ray flux doubling in 1ES 2344+514
Correlated X-ray and VHE gamma-ray emission in Mrk 421
Abstract
We present long-term observations of several VHE (E > 100 GeV) blazars with VERITAS, together with contemporaneous Swift and RXTE X-ray data. The observed targets include Mrk 421, Mrk 501, 1ES 2344+514. Strong flux and spectral variability is seen in Mrk 421 on nightly time-scales between January and June 2008, revealing a highly correlated X-ray to GeV/TeV connection. Modest X-ray variability is evident in Mrk 501. Observations of 1ES 2344+514 in December 2007 show VHE gamma-ray and X-ray flux doubling on nightly time-scales.
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Solar and Space Plasma Dynamics