Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS
arXiv:0802.1951 · doi:10.1086/587458
Abstract
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to study in detail processes occurring in Active Galactic Nuclei from radio waves to TeV gamma-rays. Here we report the detection of gamma-ray emission above 250 GeV from M87 in spring 2007 with the VERITAS atmospheric Cherenkov telescope array and discuss its correlation with the X-ray emission. The gamma-ray emission is measured to be point-like with an intrinsic source radius less than 4.5 arcmin. The differential energy spectrum is fitted well by a power-law function: dPhi/dE=(7.4+-1.3_{stat}+-1.5_{sys})(E/TeV)^{-2.31+-0.17_{stat}+-0.2_{sys}} 10^{-9}m^{-2}s^{-1}TeV^{-1}. We show strong evidence for a year-scale correlation between the gamma-ray flux reported by TeV experiments and the X-ray emission measured by the ASM/RXTE observatory, and discuss the possible short-time-scale variability. These results imply that the gamma-ray emission from M87 is more likely associated with the core of the galaxy than with other bright X-ray features in the jet.
10 pages, 7 figures, accepted for publication in The Astrophysical Journal
References in corpus (13)
- Observations of the Crab Nebula with H.E.S.S
- Fast variability of TeV gamma-rays from the radio galaxy M 87
- The First VERITAS Telescope
- Multiwavelength Observations of Markarian 421 in March 2001: an Unprecedented View on the X-ray/TeV Correlated Variability
- Production of TeV gamma-radiation in the vicinity of the supermassive black hole in the giant radiogalaxy M87
- Spine-sheath layer radiative interplay in subparsec-scale jets and the TeV emission from M87
- Dynamics and High Energy Emission of the Flaring HST-1 Knot in the M 87 Jet
- Superluminal Radio Features in the M87 Jet and the Site of Flaring TeV Gamma-ray Emission
- Observations of Mkn 421 with the MAGIC Telescope
- A synchrotron self-Compton scenario for the very high energy gamma-ray emission of the radiogalaxy M87
- Variable VHE gamma-ray emission from non-blazar AGNs
- Transitive X-ray spectrum and PeV gamma-ray cutoff in the M87 jet: Electron "Pevatron"
- The Continuing Saga of the Explosive Event(s) in the M87 Jet: Is M87 a Blazar?
Cited by in corpus (21)
- Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign
- Monitoring of the radio galaxy M87 during a low emission state from 2012 to 2015 with MAGIC
- TeV Gamma-ray Astronomy: A Summary
- MAGIC observations of the giant radio galaxy M87 in a low-emission state between 2005 and 2007
- Broadband Multi-wavelength Properties of M87 during the 2018 EHT Campaign including a Very High Energy Flaring Episode
- Search for multi-flare neutrino emissions in 10 years of IceCube data from a catalog of sources
- Hadronuclear interactions in the jet of low TeV luminosity AGN: Implications for the low-state very-high-energy gamma-ray emission
- Probing the central black hole in M87 with gamma-rays
- M87: a cosmic laboratory for deciphering black hole accretion and jet formation
- 3C66B as a TeV radiogalaxy
- Broadband Modeling of Low Luminosity Active Galactic Nuclei Detected in Gamma Rays
- Constraining the cosmic-ray pressure in the inner Virgo Cluster using H.E.S.S. observations of M 87
- Confinement and diffusion time-scales of CR hadrons in AGN-inflated bubbles
- On the sub-parsec scale core composition of FR 0 radio galaxies
- One of Everything: The Breakthrough Listen Exotica Catalog
- Constraining eV-scale axion-like particle dark matter: insights from the M87 Galaxy
- Very high energy neutrino expectation from Fanaroff-Riley I sources
- Explaining the Origin of TeV Gamma Rays from M87 During High and Low States
- Simultaneously unveiling the EBL and intrinsic spectral parameters of gamma-ray sources with Hamiltonian Monte Carlo
- The Study of X-Ray Flux Variability of M87
- Axion-like Particles and their Possible Impact on the Very High-Energy Spectrum of M87 Observed by LHAASO