Upper limits to the SN1006 multi-TeV gamma-ray flux from H.E.S.S. observations

Abstract

Observations of the shell-type supernova remnant SN1006 have been carried out with the H.E.S.S. system of Cherenkov telescopes during 2003 (18.2h with two operating telescopes) and 2004 (6.3h with all four telescopes). No evidence for TeV gamma-ray emission from any compact or extended region associated with the remnant is seen and resulting upper limits at the 99.9% confidence level are up to a factor 10 lower than previously-published fluxes from CANGAROO. For SN1006 at its current epoch of evolution we give limits for a number of important global parameters. Upper limits on the gamma-ray luminosity (for E=0.26 to 10 TeV, distance d=2 kpc) of L_gamma < 1.7x10^{33} erg s^{-1}, and the total energy in corresponding accelerated protons, W_p<1.6\times 10^{50} erg (for proton energies E_p \sim 1.5 to 60 TeV and assuming the lowest value n=0.05 cm^{-3} of the ambient target density discussed in literature) are estimated. Extending this estimate to cover the range of proton energies observed in the cosmic ray spectrum up to the knee (we take here E_p ~ 1 GeV to 3 PeV, assuming a differential particle index -2) gives W_p<6.3x10^{50} erg. A lower limit on the post-shock magnetic field of B>25microG results when considering the synchrotron/inverse-Compton framework for the observed X-ray flux and gamma-ray upper limits.

arXiv comment6 pages, 2 figures. Accepted in Astronomy and Astrophysics

References in corpus (11)

• Fine Structures of Shock of SN 1006 with the Chandra Observation
• Discovery of TeV Gamma Rays from SN1006: Further Evidence for the SNR Origin of Cosmic Rays
• The optical system of the H.E.S.S. imaging atmospheric Cherenkov telescopes, Part I: layout and components of the system
• Confirmation of strong magnetic field amplification and nuclear cosmic ray acceleration in SN 1006
• The Trigger System of the H.E.S.S. Telescope Array
• Emission of SN 1006 produced by accelerated cosmic rays
• X-Ray Synchrotron Emission from 10-100 TeV Cosmic-Ray Electrons in the Supernova Remnant SN 1006
• Performance of the Stereoscopic System of the HEGRA Imaging Air Cherenkov Telescopes: Monte Carlo Simulations & Observations
• The optical system of the H.E.S.S. imaging atmospheric Cherenkov telescopes, Part II: mirror alignment and point spread function
• Constraints On the Diffusive Shock Acceleration From the Nonthermal X-ray Thin Shells In SN1006 NE Rim
• A new template background estimate for source searching in TeV gamma-ray astronomy

Cited by in corpus (28)

• Background Modelling in Very-High-Energy gamma-ray Astronomy
• First detection of VHE gamma-rays from SN 1006 by H.E.S.S
• Potential Neutrino Signals from Galactic Gamma-Ray Sources
• TeV Gamma-Rays from Old Supernova Remnants
• Morphological evidence for azimuthal variations of the cosmic ray ion acceleration at the blast wave of SN 1006
• High energy gamma-ray emission from the starburst nucleus of NGC 253
• In which shell-type SNRs should we look for gamma-rays and neutrinos from p-p collisions?
• Suzaku wide-band observations of SN 1006
• Cosmic ray acceleration parameters from multi-wavelength observations. The case of SN 1006
• Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
• Internal dynamics and particle acceleration in Tycho's SNR
• A theory of Cosmic Rays
• Discovery of the Putative Pulsar and Wind Nebula Associated with the TeV Gamma-ray Source HESS J1813-178
• The Nature of a Cosmic-Ray Accelerator, CTB37 B, Observed with Suzaku and Chandra
• A new cosmic ray-driven instability
• A high resolution UV absorption spectrum of supernova ejecta in SN1006
• Discovery of a possible X-ray counterpart to HESS J1804-216
• XMM-Newton Large Program on SN1006 - I: Methods and Initial Results of Spatially-Resolved Spectroscopy
• Very High Energy Gamma-ray Afterglow Emission of Nearby Gamma-ray Bursts
• Spatially resolved broad-band synchrotron emission from the non-thermal limbs of SN1006
• X-Ray Observations of SN 1006 with Integral
• VHE Gamma-ray supernova remnants
• Inverse Compton gamma-ray models for remnants of Galactic type Ia supernovae?
• Multiwavelength Spectral Models for SNR G347.3-0.5 from Non-Linear Shock Acceleration
• Astrophysics in 2005
• High-(Energy)-Lights -- The Very High Energy Gamma-Ray Sky
• Reanalysis of Data Taken by the CANGAROO 3.8 Meter Imaging Atmospheric Cherenkov Telescope: PSR B1706-44, SN 1006, and Vela
• Progress on multi-waveband observations of supernova remnants