activity
19962025
most citedVery-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?

446 citations · 10.1k across the 172 of their papers we have counts for

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Showing 2009Show all

10 papers · 1 filter

astro-ph.SR2009★ 12 cited

The spectroscopic evolution of the symbiotic star AG Draconis. I.The O VI Raman, Balmer, and helium emission line variations during the outburst of 2006-2008

S. N. Shore, G. M. Wahlgren, K. Genovali +6

AG Dra is one of a small group of low metallicity S-type symbiotic binaries with K-type giants that undergoes occasional short-term outbursts of unknown origin. Our aim is to study…

astro-ph.HE2009★ 21 cited

Simultaneous multi-frequency observation of the unknown redshift blazar PG 1553+113 in March-April 2008

MAGIC Collaboration, J. Aleksić, H. Anderhub +161

The blazar PG 1553+113 is a well known TeV gamma-ray emitter. In this paper, we determine its spectral energy distribution using simultaneous multi-frequency data in order to study…

astro-ph.HE2009★ 56 cited

Correlated X-ray and Very High Energy emission in the gamma-ray binary LS I +61 303

The MAGIC Collaboration, H. Anderhub, L. A. Antonelli +153

The discovery of very high energy (VHE) gamma-ray emitting X-ray binaries has triggered an intense effort to better understand the particle acceleration, absorption, and emission m…

astro-ph.HE2009★ 59 cited

Simultaneous Multiwavelength observation of Mkn 501 in a low state in 2006

The MAGIC Collaboration, H. Anderhub, R. Sato +4

We present results of the multiwavelength campaign on the TeV blazar Mkn 501 performed in 2006 July, including MAGIC for the VHE gamma-ray band and Suzaku for the X-ray band. A VHE…

astro-ph.HE2009★ 145 cited

MAGIC Gamma-ray Telescope Observation of the Perseus Cluster of Galaxies: implications for cosmic rays, dark matter, and NGC1275

The MAGIC Collaboration, J. Aleksić, L. A. Antonelli +152

The Perseus galaxy cluster was observed by the MAGIC Cherenkov telescope for a total effective time of 24.4 hr during 2008 November and December. The resulting upper limits on the…

astro-ph.HE2009★ 243 cited

Radio Imaging of the Very-High-Energy Gamma-Ray Emission Region in the Central Engine of a Radio Galaxy

The VERITAS Collaboration, the VLBA 43 GHz M 87 Monitoring Team, the H. E. S. S. Collaboration +1

The accretion of matter onto a massive black hole is believed to feed the relativistic plasma jets found in many active galactic nuclei (AGN). Although some AGN accelerate particle…