First simultaneous multiwavelength observations of the BL Lac object 1ES1959+650 in a steady state with MAGIC and Suzaku/Swift

M. Hayashida; C. Bigongiari; D. Kranich; A. Moralejo; G. Tagliaferri; F. Tavecchio; L. Foschini; G. Ghisellin; L. Maraschi; G. Tosti

arXiv · 0709.2349

First simultaneous multiwavelength observations of the BL Lac object 1ES1959+650 in a steady state with MAGIC and Suzaku/Swift

M. Hayashida·C. Bigongiari·D. Kranich·A. Moralejo·G. Tagliaferri·F. Tavecchio·L. Foschini·G. Ghisellin·L. Maraschi·G. Tosti

View original source ↗Read source document ↗Export metadata ↓

Abstract

Simultaneous multiwavelength observations were conducted for the BL Lac object 1ES1959+650 in a steady state in May 2006 with the MAGIC telescope and the X-ray satellites Suzaku and Swift. Swift can also provide multi-filter photometry in the UV-optical band. The source was clearly detected in all observed energy bands, from the optical to TeV. With respect to previous observations the source was in a low state in the very high energy (VHE) band (~10% Crab flux above 300 GeV) but in a relatively high state in the X-ray band. The light curves showed rather stable activities, with no significant variability in the VHE gamma-ray emission and small variability (~10% amplitude) in the X-ray band. The observed spectral energy distribution in the steady state can be described by a one-zone synchrotron self-Compton model.

Explore related subjects

astro-ph

Keep this discovery

Explore connections, maps & timelines

BibTeX RIS

M. Hayashida, C. Bigongiari, D. Kranich, A. Moralejo, G. Tagliaferri, F. Tavecchio, L. Foschini, G. Ghisellin, L. Maraschi, G. Tosti. 2007-09-14. First simultaneous multiwavelength observations of the BL Lac object 1ES1959+650 in a steady state with MAGIC and Suzaku/Swift. https://arxiv.org/abs/0709.2349

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

arXiv2026

Cosmic Conundrums with Quantum Corrections

Darh energy was discovered over 25 years ago and we do not have an explanation of it. Dark matter comprises 95% of matter in the universe and we still don't know what it is. The Webb telescope has been finding fully formed galaxies with massive black holes millions of times the mass of the sun in the early universe and we don't have any explanation. A quantum density limitation will be used to solve these and other outstanding problems.

astro-ph↗

arXiv2026

On binary pulsars and the force of gravity

The energy-momentum budget of the astrophysical systems can be studied by the exact local conservation equation derived by Landau and Lifshitz. We show that a similar equation is valid for the Einstein-Cartan gravity. We reanalyze a binary pulsar system using the Landau-Lifshitz conservation equation and show that the orbital period change rate can be completely understood as a curvature backreaction process. Taking into account the detailed theoretical and observational research of relativistic binary pulsar systems, especially the system of Hulse and Taylor, we conclude that general relativity and astrophysical observations rule out the existence of gravitational radiation. We comment upon the LIGO GW events and their alternative explanation, as well as the recent pulsar timing arrays data.

astro-ph↗

arXiv2026

Oscillation frequencies and mode lifetimes in alpha Centauri A

We analyse our recently-published velocity measurements of alpha Cen A (Butler et al. 2004). After adjusting the weights on a night-by-night basis in order to optimize the window function to minimize sidelobes, we extract 42 oscillation frequencies with l=0 to 3 and measure the large and small frequency separations. We give fitted relations to these frequencies that can be compared with theoretical models and conclude that the observed scatter about these fits is due to the finite lifetimes of the oscillation modes. We estimate the mode lifetimes to be 1-2 d, substantially shorter than in the Sun.

astro-ph↗