First detection of VHE γ-rays from SN 1006 by HESS

Recent theoretical predictions of the lowest very high energy (VHE) luminosity of SN 1006 are only a factor 5 below the previously published H.E.S.S. upper limit, thus motivating further in-depth observations of this source. Deep observations at VHE energies (above 100 GeV) were carried out with the High Energy Stereoscopic System (H.E.S.S.) of Cherenkov Telescopes from 2003 to 2008. More than 100 hours of data have been collected and subjected to an improved analysis procedure. Observations resulted in the detection of VHE gamma-rays from SN 1006. The measured gamma-ray spectrum is compatible with a power-law, the flux is of the order of 1% of that detected from the Crab Nebula, and is thus consistent with the previously established H.E.S.S. upper limit. The source exhibits a bipolar morphology, which is strongly correlated with non-thermal X-rays. Because the thickness of the VHE-shell is compatible with emission from a thin rim, particle acceleration in shock waves is likely to be the origin of the gamma-ray signal. The measured flux level can be accounted for by inverse Compton emission, but a mixed scenario that includes leptonic and hadronic components and takes into account the ambient matter density inferred from observations also leads to a satisfactory description of the multi-wavelength spectrum.

U. Schwanke | C. Boisson | H. Sol | F. Ryde | A. Bochow | A. C. Clapson | K. Egberts | S. Hoppe | D. Nekrassov | M. Panter | O. Tibolla | A. G. Akhperjanian | A. R. Bazer-Bachi | J-F. Olive | T. Kneiske | M. Kerschhaggl | T. Lohse | I. Sushch | L. Venter | J. F. Glicenstein | M. Vivier | P. M. Chadwick | A. Cheesebrough | H. J. Dickinson | S. J. Nolan | S. M. Rayner | C. B. Rulten | M. Holleran | B. C. Raubenheimer | G. Fontaine | M. Naumann-Godo | G. Superina | G. Coignet | A. Fiasson | R. Kossakowski | J. Masbou | S. Rosier-Lees | J. P. Vialle | P. Espigat | R. Terrier | L. Fallon | S. Gabici | B. Behera | M. Hauser | S. Schwemmer | P. H. Tam | C. Farnier | F. Feinstein | Y. A. Gallant | G. Vasileiadis | F. Stinzing | T. Boutelier | G. Pelletier | A. Hoffmann | A. Jacholkowska | D. Nedbal | D. Gerbig | J. Ruppel | A. Shalchi | M. Ostrowski | L. Stawarz | J. Dyks | J. A. Hinton | J. L. Skilton | M. Dyrda | J. Ripken | G. Dubus | F. Aharonian | G. Anton | U. Barres de Almeida | Y. Becherini | K. Bernlohr | J. Bolmont | J. Brucker | F. Brun | P. Brun | T. Bulik | I. Busching | A. Charbonnier | R.C.G. Chaves | J. Conrad | M. Dalton | M. K. Daniel | I. D. Davids | B. Degrange | C. Deil | A. Djannati-Atai | W. Domainko | P. Eger | S. Fegan | A. Forster | M. Fussling | L. G'erard | B. Giebels | B. Gluck | P. Goret | D. Goring | S. Heinz | G. Heinzelmann | G. Henri | G. Hermann | W. Hofmann | P. Hofverberg | D. Horns | O. C. de Jager | C. Jahn | I. Jung | K. Katarzy'nski | U. Katz | S. Kaufmann | D. Keogh | D. Khangulyan | B. Kh'elifi | D. Klochkov | W. Klu'zniak | Nu. Komin | K. Kosack | G. Lamanna | V. Marandon | A. Marcowith | D. Maurin | T.J.L. McComb | M. C. Medina | J. M'ehault | E. Moulin | M. de Naurois | B. Nicholas | J. Niemiec | S. Ohm | P.-O. Petrucci | S. Pita | M. Punch | A. Quirrenbach | M. Raue | M. Renaud | R. de los Reyes | F. Rieger | L. Rob | G. Rowell | B. Rudak | V. Sahakian | A. Santangelo | R. Schlickeiser | F. M. Schock | S. Schwarzburg | R. Steenkamp | C. Stegmann | A. Szostek | J.-P. Tavernet | M. Tluczykont | C. van Eldik | C. Venter | P. Vincent | H. J. Volk | F. Volpe | S. Vorobiov | S. J. Wagner | M. Ward | A. A. Zdziarski | A. Zech | V. Borrel | R. Buhler | L.-M. Chounet | L.O'C. Drury | J.-P. Lenain | M. Sikora | M. Beilicke | D. Hauser | M. Lemoine-Goumard | HESS Collaboration F. Acero | F. Dubois | E. de Ona Wilhelmi K.J. Orford | M. Paz Arribas G. Pedaletti | 12 G. Puhlhofer | O. Reimer | A. Schonwald | J. Vink | Nicolas Produit | T. Bulik | G. Anton | U. Katz | E. Moulin | T. Lohse | T. Mccomb | M. Kerschhaggl | W. Domainko | C. Deil | S. Rosier-Lees | A. Quirrenbach | J. Olive | C. Venter | M. Raue | F. Dubois | S. Ohm | C. Stegmann | I. Davids | J. Vink | W. Hofmann | M. Hauser | G. Fontaine | R. Schlickeiser | B. Degrange | L. Chounet | F. Aharonian | D. Horns | Y. Gallant | S. Fegan | K. Kosack | Y. Becherini | F. Feinstein | P. Goret | M. Naumann-Godo | A. Santangelo | L. Drury | S. Gabici | S. Wagner | M. Sikora | M. Beilicke | J. Ruppel | M. Vivier | C. Farnier | A. Schonwald | D. Khangulyan | L. Stawarz | H. Dickinson | J. Ripken | M. Ward | J. Tavernet | M. Panter | B. Behera | C. Boisson | J. Bolmont | P. Brun | M. Daniel | M. Naurois | G. Dubus | J. Dyks | M. Dyrda | K. Egberts | P. Eger | A. Fiasson | B. Giebels | J. Glicenstein | G. Henri | G. Hermann | P. Hofverberg | A. Jacholkowska | I. Jung | N. Komin | R. Kossakowski | G. Lamanna | J. Lenain | A. Marcowith | D. Nedbal | J. Niemiec | S. Nolan | M. Ostrowski | P. Petrucci | S. Pita | M. Punch | O. Reimer | M. Renaud | F. Rieger | L. Rob | B. Rudak | C. Rulten | F. Ryde | V. Sahakian | U. Schwanke | S. Schwarzburg | S. Schwemmer | H. Sol | R. Steenkamp | F. Stinzing | A. Szóstek | R. Terrier | O. Tibolla | M. Tluczykont | C. Eldik | G. Vasileiadis | J. Vialle | P. Vincent | S. Vorobiov | A. Zdziarski | A. Zech | V. Borrel | H. Volk | D. Gerbig | M. Lemoine-Goumard | B. Kh'elifi | G. Rowell | F. Brun | R. Chaves | A. Djannati-Atai | V. Marandon | P. Chadwick | I. Sushch | S. Kaufmann | K. Bernlohr | M. Fussling | J. Hinton | K. Katarzy'nski | W. Klu'zniak | S. Heinz | B. Nicholas | R. Reyes | A. Akhperjanian | A. Bochow | J. Brucker | T. Boutelier | A. Charbonnier | A. Cheesebrough | A. Clapson | M. Dalton | P. Espigat | D. Hauser | G. Heinzelmann | A. Hoffmann | S. Hoppe | C. Jahn | D. Keogh | D. Klochkov | T. Kneiske | J. Masbou | D. Maurin | D. Nekrassov | G. Pelletier | B. Raubenheimer | S. Rayner | A. Shalchi | J. Skilton | G. Superina | P. Tam | L. Venter | F. Volpe | R. Buhler | L. Fallon | M. Holleran | O. D. Jager | A. Forster | I. Busching | J. M'ehault | D. Goring | U. D. Almeida | L. G'erard | B. Gluck | F. Schock | J. Conrad | E. Orford | H. C. F. Acero | M. P. A. G. Pedaletti | S. Wagner

[1]  S. Funk,et al.  Background modelling in very-high-energy gamma-ray astronomy , 2006 .

[2]  Philippe Ferrando,et al.  Geometry of the non-thermal emission in SN 1006 - Azimuthal variations of cosmic-ray acceleration , 2004 .

[3]  K. Long,et al.  The SN 1006 Remnant: Optical Proper Motions, Deep Imaging, Distance, and Brightness at Maximum , 2002, astro-ph/0208415.

[4]  F. Aharonian.  Upper limits to the SN1006 multi-TeV gamma-ray flux from HESS observations , 2005 .

[5]  Mathieu de Naurois,et al.  A high performance likelihood reconstruction of γ-rays for imaging atmospheric Cherenkov telescopes , 2009, 0907.2610.

[6]  Knox S. Long,et al.  Chandra CCD Imagery of the Northeast and Northwest Limbs of SN 1006 , 2003 .

[7]  Roger D. Blandford,et al.  Particle acceleration at astrophysical shocks: A theory of cosmic ray origin , 1987 .

[8]  Heinrich J. Völk,et al.  Dependence of the gamma-ray emission from SN 1006 on the astronomical parameters , 2005 .

[9]  F. C. Jones,et al.  The Influence of Particle Scattering on Acceleration Rates and Injection Efficiencies in Oblique Shocks , 1995 .

[10]  B. Schaefer.  Peak Brightnesses of Historical Supernovae and the Hubble Constant , 1996 .

[11]  G. E. Allen,et al.  Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006 , 2008, 0807.1702.

[12]  Heidelberg,et al.  Variation of cosmic ray injection across supernova shocks , 2003 .

[13]  C. McKee,et al.  Evolution of Nonradiative Supernova Remnants , 1996 .

[14]  David A. Green,et al.  Historical Supernovae and Their Remnants , 2002 .

[15]  J. Chiang,et al.  THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION , 2009, 0902.1089.

[16]  John P. Hughes,et al.  Morphological Evidence for Azimuthal Variations of the Cosmic-Ray Ion Acceleration at the Blast Wave of SN 1006 , 2008, 0803.0805.

[17]  S. E. Woosley,et al.  Type?Ia Supernova Light Curves , 2007 .

[18]  Aya Bamba,et al.  Small-Scale Structure of the SN 1006 Shock with Chandra Observations , 2003 .

[19]  Heinrich J. Völk,et al.  Emission of SN 1006 produced by accelerated cosmic rays , 2002 .

[20]  M. Lemoine-Goumard,et al.  Upgrading and testing the 3D reconstruction of gamma-ray air showers as observed with an array of Imaging Atmospheric Cherenkov Telescopes , 2009, 0905.0359.

[21]  A.Suzuki,et al.  Discovery of TeV Gamma Rays from SN1006: Further Evidence for the SNR Origin of Cosmic Rays , 1998 .

[22]  Stephen P. Reynolds,et al.  Synchrotron Models for X-Rays from the Supernova Remnant SN 1006 , 1996 .

[23]  R. Petre,et al.  Evidence for shock acceleration of high-energy electrons in the supernova remnant SN1006 , 1995, Nature.

[24]  Heinrich J. Völk,et al.  Variation of cosmic ray injection across supernova shocks , 2003, astro-ph/0306016.

[25]  S. Funk,et al.  The trigger system of the H.E.S.S. telescope array , 2004 .

[26]  Koji Mori,et al.  THE FIRST X-RAY PROPER-MOTION MEASUREMENTS OF THE FORWARD SHOCK IN THE NORTHEASTERN LIMB OF SN 1006 , 2008, 0901.0149.

[27]  L. Drury,et al.  An introduction to the theory of diffusive shock acceleration of energetic particles in tenuous plasmas , 1983 .

[28]  Frank C. Jones,et al.  The plasma physics of shock acceleration , 1989 .

[29]  H. Krawczynski,et al.  The optical system of the H.E.S.S. imaging atmospheric Cherenkov telescopes. Part I: layout and components of the system , 2003, astro-ph/0308246.

[30]  L. Drury,et al.  Nonlinear theory of diffusive acceleration of particles by shock waves , 2001 .

[31]  Yasushi Fukazawa,et al.  Suzaku Wide-Band Observations of SN 1006 , 2007, 0708.0073.

[32]  M. Tluczykont,et al.  Selection and 3D-Reconstruction of Gamma-Ray-induced Air Showers with a Stereoscopic System of Atmospheric Cherenkov Telescopes , 2006, astro-ph/0601373.

[33]  Richard Willingale,et al.  ROSAT PSPC observations of the remnant of SN 1006 , 1996 .

[34]  F. F. Gardner,et al.  The Supernova of A.D. 1006 , 1965 .

[35]  Faculte De Medecine,et al.  UNIVERSITE PIERRE ET MARIE CURIE (PARIS 6) , 2011 .

[36]  Felix Aharonian,et al.  Energy spectra of gamma rays, electrons, and neutrinos produced at proton-proton interactions in the very high energy regime , 2006 .

[37]  S. Reynolds,et al.  Electron acceleration in Tycho's and Kepler's supernova remnants - Spectral evidence of Fermi shock acceleration , 1992 .

[38]  E. Berezhko,et al.  Cosmic ray acceleration parameters from multi-wavelength observations. The case of SN 1006 , 2009, 0906.3944.