243 citations · 2.3k across the 46 of their papers we have counts for
46 papers
Beyond the myth of the supernova-remnant origin of cosmic rays
Yousaf Butt
The origin of Galactic cosmic-ray ions has remained an enigma for almost a century. Although it has generally been thought that they are accelerated in the shock waves associated w…
Cosmic Ray Accelerators in the Large Magellanic Cloud
Yousaf M. Butt
I point out a correlation between gamma-ray emissivity and the historical star formation rate in the Large Magellanic Cloud ~12.5 Myr ago. This correlation bolsters the view that C…
Observations of the shell-type SNR Cassiopeia A at TeV energies with VERITAS
The VERITAS Collaboration, V. A. Acciari, E. Aliu +80
We report on observations of very high-energy gamma rays from the shell-type supernova remnant Cassiopeia A with the VERITAS stereoscopic array of four imaging atmospheric Cherenko…
Detection of Extended VHE Gamma Ray Emission from G106.3+2.7 with VERITAS
VERITAS Collaboration, V. A. Acciari, E. Aliu +80
We report the detection of very-high-energy (VHE) gamma-ray emission from supernova remnant (SNR) G106.3+2.7. Observations performed in 2008 with the VERITAS atmospheric Cherenkov…
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…
Observation of Extended VHE Emission from the Supernova Remnant IC 443 with VERITAS
VERITAS Collaboration, V. A. Acciari, E. Aliu +90
We present evidence that the very-high-energy (VHE, E > 100 GeV) gamma-ray emission coincident with the supernova remnant IC 443 is extended. IC 443 contains one of the best-studie…