We report the Fermi-LAT discovery of high-energy (MeV/GeV) gamma-ray emission positionally consistent with the center of the radio galaxy M87, at a source significance of over 10 sigma in ten-months of all-sky survey data. Following the detections of Cen A and Per A, this makes M87 the third radio galaxy seen with the LAT. The faint point-like gamma-ray source has a >100 MeV flux of 2.45 (+/- 0.63) x 10^-8 ph cm^-2 s^-1 (photon index = 2.26 +/- 0.13) with no significant variability detected within the LAT observation. This flux is comparable with the previous EGRET upper limit (< 2.18 x 10^-8 ph cm^-2 s^-1, 2 sigma), thus there is no evidence for a significant MeV/GeV flare on decade timescales. Contemporaneous Chandra and VLBA data indicat...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to stud...
International audienceWe study the contribution of thermal and non-thermal processes to the inverse ...
M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a mon...
We report the Fermi-LAT discovery of high-energy (MeV/GeV) gamma-ray emission positionally consisten...
We report the Fermi Large Area Telescope (LAT) discovery of high-energy (MeV/GeV) gamma-ray emission...
We report the Fermi Large Area Telescope (LAT) discovery of high-energy (MeV/GeV) gamma-ray emission...
We report the Fermi Large Area Telescope (LAT) discovery of high-energy (MeV/GeV) γ-ray emission pos...
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...
For the first time an excess of photons above an energy threshold of 730 GeV from the giant radio ga...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to stud...
International audienceWe study the contribution of thermal and non-thermal processes to the inverse ...
M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a mon...
We report the Fermi-LAT discovery of high-energy (MeV/GeV) gamma-ray emission positionally consisten...
We report the Fermi Large Area Telescope (LAT) discovery of high-energy (MeV/GeV) gamma-ray emission...
We report the Fermi Large Area Telescope (LAT) discovery of high-energy (MeV/GeV) gamma-ray emission...
We report the Fermi Large Area Telescope (LAT) discovery of high-energy (MeV/GeV) γ-ray emission pos...
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...
For the first time an excess of photons above an energy threshold of 730 GeV from the giant radio ga...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to stud...
International audienceWe study the contribution of thermal and non-thermal processes to the inverse ...
M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a mon...