M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a monitoring program of M87, a rapid flare in VHE gamma-rays was detected by the MAGIC telescope in early 2008. The flux was found to be variable above 350 GeV on a timescale as short as 1 day at a significance level of 5.6 σ. The highest measured flux reached 15% of the Crab Nebula flux. We observed several substantial changes of the flux level during the 13 day observing period. The flux at lower energies (150-350 GeV), instead, is compatible with being constant. The energy spectrum can be described by a power law with a photon index of 2.30 +/- 0.11stat +/- 0.20syst. The observed day-scale flux variability at VHE prefers the M87 core as source ...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to stud...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to stud...
The giant radio galaxy M 87 with its proximity (16 Mpc), famous jet, and very massive black hole ((3...
M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a mon...
M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a mon...
M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a mon...
M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a mon...
M87 is the only known non-blazar radio galaxy to emit very high energy (VHE) gamma-rays. During a mo...
M87 is the first known radio galaxy to emit very high energy (VHE) gamma-rays. During a monitoring p...
VERITAS has been monitoring the very-high-energy (VHE; > 100 GeV) gamma-ray activity of the r...
M87 is a nearby radio galaxy that is detected at energies ranging from radio to VHE gamma-rays. Its ...
The giant radio galaxy M87 with its proximity (16Mpc), famous jet, and very massive black hole ((3 -...
For the first time an excess of photons above an energy threshold of 730 GeV from the giant radio ga...
M 87 is a nearby radio galaxy that is detected at energies ranging from radio to very high energy (V...
VERITAS has been monitoring the very-high-energy (VHE; > 100 GeV) gamma-ray activity of the radio ga...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to stud...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to stud...
The giant radio galaxy M 87 with its proximity (16 Mpc), famous jet, and very massive black hole ((3...
M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a mon...
M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a mon...
M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a mon...
M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a mon...
M87 is the only known non-blazar radio galaxy to emit very high energy (VHE) gamma-rays. During a mo...
M87 is the first known radio galaxy to emit very high energy (VHE) gamma-rays. During a monitoring p...
VERITAS has been monitoring the very-high-energy (VHE; > 100 GeV) gamma-ray activity of the r...
M87 is a nearby radio galaxy that is detected at energies ranging from radio to VHE gamma-rays. Its ...
The giant radio galaxy M87 with its proximity (16Mpc), famous jet, and very massive black hole ((3 -...
For the first time an excess of photons above an energy threshold of 730 GeV from the giant radio ga...
M 87 is a nearby radio galaxy that is detected at energies ranging from radio to very high energy (V...
VERITAS has been monitoring the very-high-energy (VHE; > 100 GeV) gamma-ray activity of the radio ga...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to stud...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to stud...
The giant radio galaxy M 87 with its proximity (16 Mpc), famous jet, and very massive black hole ((3...