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Physical Sciences and Mathematics Commons

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Astrophysics and Astronomy

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Physical Sciences Publications

2014

Gamma rays: galaxies

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Full-Text Articles in Physical Sciences and Mathematics

Investigating Broadband Variability Of The Tev Blazar 1es 1959+650, P. T. Reynolds, Veritas Dec 2014

Investigating Broadband Variability Of The Tev Blazar 1es 1959+650, P. T. Reynolds, Veritas

Physical Sciences Publications

We summarize broadband observations of the TeV-emitting blazar 1ES 1959+650, including optical R-band observations by the robotic telescopes Super-LOTIS and iTelescope, UV observations by Swift Ultraviolet and Optical Telescope, X-ray observations by the Swift X-ray Telescope, high-energy gamma-ray observations with the Fermi Large Area Telescope, and very-high-energy (VHE) gamma-ray observations by VERITAS above 315 GeV, all taken between 2012 April 17 and 2012 June 1 (MJD 56034 and 56079). The contemporaneous variability of the broadband spectral energy distribution is explored in the context of a simple synchrotron self Compton (SSC) model. In the SSC emission scenario, we find that the …


Very-High Energy Observations Of The Galactic Center Region By Veritas In 2010-2012, P. T. Reynolds, Et. Al. Aug 2014

Very-High Energy Observations Of The Galactic Center Region By Veritas In 2010-2012, P. T. Reynolds, Et. Al.

Physical Sciences Publications

The Galactic center is an interesting region for high-energy (0.1-100 GeV) and very-high-energy (E > 100 GeV) γ-ray observations. Potential sources of GeV/TeV γ-ray emission have been suggested, e.g., the accretion of matter onto the supermassive black hole, cosmic rays from a nearby supernova remnant (e.g., Sgr A East), particle acceleration in a plerion, or the annihilation of dark matter particles. The Galactic center has been detected by EGRET and by Fermi/LAT in the MeV/GeV energy band. At TeV energies, the Galactic center was detected with moderate significance by the CANGAROO and Whipple 10 m telescopes and with high significance by …