Detection of very high energy radiation from HESS J1908+063 confirms the Milagro unidentified source MGRO J1908+06

F. Aharonian; A. G. Akhperjanian; G. Anton; U. Barres de Almeida; A. R. Bazer-Bachi; Y. Becherini; B. Behera; W. Benbow; K. Bernlöhr; C. Boisson; A. Bochow; V. Borrel; I. Braun; E. Brion; J. Brucker; P. Brun; R. Bühler; T. Bulik; I. Büsching; T. Boutelier; S. Carrigan; P. M. Chadwick; A. Charbonnier; R. C. G. Chaves; A. Cheesebrough; L.-M. Chounet; A. C. Clapson; G. Coignet; M. Dalton; M. K. Daniel; B. Degrange; C. Deil; H. J. Dickinson; A. Djannati-Ataï; W. Domainko; L. O'C. Drury; F. Dubois; G. Dubus; J. Dyks; M. Dyrda; K. Egberts; D. Emmanoulopoulos; P. Espigat; C. Farnier; F. Feinstein; A. Fiasson; A. Förster; G. Fontaine; M. Füßling; S. Gabici; Y. A. Gallant; L. Gérard; B. Giebels; J. F. Glicenstein; B. Glück; P. Goret; D. Hauser; M. Hauser; S. Heinz; G. Heinzelmann; G. Henri; G. Hermann; J. A. Hinton; A. Hoffmann; W. Hofmann; M. Holleran; S. Hoppe; D. Horns; A. Jacholkowska; O. C. de Jager; I. Jung; K. Katarzyński; U. Katz; S. Kaufmann; E. Kendziorra; M. Kerschhaggl; D. Khangulyan; B. Khélifi; D. Keogh; Nu. Komin; K. Kosack; G. Lamanna; J.-P. Lenain; T. Lohse; V. Marandon; J. M. Martin; O. Martineau-Huynh; A. Marcowith; D. Maurin; T. J. L. McComb; M. C. Medina; R. Moderski; E. Moulin; M. Naumann-Godo; M. de Naurois; D. Nedbal; D. Nekrassov; J. Niemiec; S. J. Nolan; S. Ohm; J.-F. Olive; E. de Oña Wilhelmi; K. J. Orford; M. Ostrowski; M. Panter; M. Paz Arribas; G. Pedaletti; G. Pelletier; P.-O. Petrucci; S. Pita; G. Pühlhofer; M. Punch; A. Quirrenbach; B. C. Raubenheimer; M. Raue; S. M. Rayner; M. Renaud; O. Reimer; F. Rieger; J. Ripken; L. Rob; S. Rosier-Lees; G. Rowell; B. Rudak; C. B. Rulten; J. Ruppel; V. Sahakian; A. Santangelo; R. Schlickeiser; F. M. Schöck; R. Schröder; U. Schwanke; S. Schwarzburg; S. Schwemmer; A. Shalchi; J. L. Skilton; H. Sol; D. Spangler; Ł. Stawarz; R. Steenkamp; C. Stegmann; G. Superina; P. H. Tam; J.-P. Tavernet; R. Terrier; O. Tibolla; C. van Eldik; G. Vasileiadis; C. Venter; L. Venter; J. P. Vialle; P. Vincent; M. Vivier; H. J. Völk; F. Volpe; S. J. Wagner; M. Ward; A. A. Zdziarski; A. Zech

doi:10.1051/0004-6361/200811357

Home

All issues

Volume 499 / No 3 (June I 2009)

A&A, 499 3 (2009) 723-728

Abstract

Free Access

Issue		A&A Volume 499, Number 3, June I 2009


Page(s)		723 - 728
Section		Extragalactic astronomy
DOI		https://doi.org/10.1051/0004-6361/200811357
Published online		29 April 2009

A&A 499, 723-728 (2009)

Detection of very high energy radiation from HESS J1908+063 confirms the Milagro unidentified source MGRO J1908+06

F. Aharonian¹^,2, A. G. Akhperjanian³, G. Anton⁴, U. Barres de Almeida⁵, A. R. Bazer-Bachi⁶, Y. Becherini⁷, B. Behera⁸, W. Benbow¹, K. Bernlöhr¹^,9, C. Boisson¹⁰, A. Bochow¹, V. Borrel⁶, I. Braun¹, E. Brion¹¹, J. Brucker⁴, P. Brun¹¹, R. Bühler¹, T. Bulik¹², I. Büsching¹³, T. Boutelier¹⁴, S. Carrigan¹, P. M. Chadwick⁵, A. Charbonnier¹⁵, R. C. G. Chaves¹, A. Cheesebrough⁵, L.-M. Chounet¹⁶, A. C. Clapson¹, G. Coignet¹⁷, M. Dalton⁹, M. K. Daniel⁵, B. Degrange¹⁶, C. Deil¹, H. J. Dickinson⁵, A. Djannati-Ataï⁷, W. Domainko¹, L. O'C. Drury², F. Dubois¹⁷, G. Dubus¹⁴, J. Dyks¹², M. Dyrda¹⁸, K. Egberts¹, D. Emmanoulopoulos⁸, P. Espigat⁷, C. Farnier¹⁹, F. Feinstein¹⁹, A. Fiasson¹⁹, A. Förster¹, G. Fontaine¹⁶, M. Füßling⁹, S. Gabici², Y. A. Gallant¹⁹, L. Gérard⁷, B. Giebels¹⁶, J. F. Glicenstein¹¹, B. Glück⁴, P. Goret¹¹, D. Hauser⁸, M. Hauser⁸, S. Heinz⁴, G. Heinzelmann²⁰, G. Henri¹⁴, G. Hermann¹, J. A. Hinton²¹, A. Hoffmann²², W. Hofmann¹, M. Holleran¹³, S. Hoppe¹, D. Horns²⁰, A. Jacholkowska¹⁵, O. C. de Jager¹³, I. Jung⁴, K. Katarzyński²³, U. Katz⁴, S. Kaufmann⁸, E. Kendziorra²², M. Kerschhaggl⁹, D. Khangulyan¹, B. Khélifi¹⁶, D. Keogh⁵, Nu. Komin¹¹, K. Kosack¹, G. Lamanna¹⁷, J.-P. Lenain¹⁰, T. Lohse⁹, V. Marandon⁷, J. M. Martin¹⁰, O. Martineau-Huynh¹⁵, A. Marcowith¹⁹, D. Maurin¹⁵, T. J. L. McComb⁵, M. C. Medina¹⁰, R. Moderski¹², E. Moulin¹¹, M. Naumann-Godo¹⁶, M. de Naurois¹⁵, D. Nedbal²⁴, D. Nekrassov¹, J. Niemiec¹⁸, S. J. Nolan⁵, S. Ohm¹, J.-F. Olive⁶, E. de Oña Wilhelmi⁷^,25, K. J. Orford⁵, M. Ostrowski²⁶, M. Panter¹, M. Paz Arribas⁹, G. Pedaletti⁸, G. Pelletier¹⁴, P.-O. Petrucci¹⁴, S. Pita⁷, G. Pühlhofer⁸, M. Punch⁷, A. Quirrenbach⁸, B. C. Raubenheimer¹³, M. Raue¹^,25, S. M. Rayner⁵, M. Renaud¹, O. Reimer²⁷, F. Rieger¹^,25, J. Ripken²⁰, L. Rob²⁴, S. Rosier-Lees¹⁷, G. Rowell²⁸, B. Rudak¹², C. B. Rulten⁵, J. Ruppel²⁹, V. Sahakian³, A. Santangelo²², R. Schlickeiser²⁹, F. M. Schöck⁴, R. Schröder²⁹, U. Schwanke⁹, S. Schwarzburg²², S. Schwemmer⁸, A. Shalchi²⁹, J. L. Skilton²¹, H. Sol¹⁰, D. Spangler⁵, Ł. Stawarz²⁶, R. Steenkamp³⁰, C. Stegmann⁴, G. Superina¹⁶, P. H. Tam⁸, J.-P. Tavernet¹⁵, R. Terrier⁷, O. Tibolla⁸, C. van Eldik¹, G. Vasileiadis¹⁹, C. Venter¹³, L. Venter¹⁰, J. P. Vialle¹⁷, P. Vincent¹⁵, M. Vivier¹¹, H. J. Völk¹, F. Volpe¹⁶^,25, S. J. Wagner⁸, M. Ward⁵, A. A. Zdziarski¹² and A. Zech¹⁰

¹ Max-Planck-Institut für Kernphysik, PO Box 103980, 69029 Heidelberg, Germany
² Dublin Institute for Advanced Studies, 5 Merrion Square, Dublin 2, Ireland
³ Yerevan Physics Institute, 2 Alikhanian Brothers St., 375036 Yerevan, Armenia
⁴ Universität Erlangen-Nürnberg, Physikalisches Institut, Erwin-Rommel-Str. 1, 91058 Erlangen, Germany
⁵ University of Durham, Department of Physics, South Road, Durham DH1 3LE, UK
⁶ Centre d'Étude Spatiale des Rayonnements, CNRS/UPS, 9 av. du Colonel Roche, BP 4346, 31029 Toulouse Cedex 4, France
⁷ Astroparticule et Cosmologie (APC), CNRS, Université Paris 7 Denis Diderot, 10 rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France (UMR 7164, CNRS, Université Paris VII, CEA, Observatoire de Paris, France) e-mail: emma@apc.univ-paris7.fr e-mail: djannati@apc.univ-paris7.fr
⁸ Landessternwarte, Universität Heidelberg, Königstuhl, 69117 Heidelberg, Germany
⁹ Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany
¹⁰ LUTH, Observatoire de Paris, CNRS, Université Paris Diderot, 5 place Jules Janssen, 92190 Meudon, France 
¹¹ IRFU/DSM/CEA, CE Saclay, 91191 Gif-sur-Yvette, Cedex, France
¹² Nicolaus Copernicus Astronomical Center, ul. Bartycka 18, 00-716 Warsaw, Poland
¹³ Unit for Space Physics, North-West University, Potchefstroom 2520, South Africa
¹⁴ Laboratoire d'Astrophysique de Grenoble, INSU/CNRS, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France
¹⁵ LPNHE, Université Pierre et Marie Curie Paris 6, Université Denis Diderot Paris 7, CNRS/IN2P3, 4 place Jussieu, 75252 Paris Cedex 5, France
¹⁶ Laboratoire Leprince-Ringuet, École Polytechnique, CNRS/IN2P3, 91128 Palaiseau, France
¹⁷ Laboratoire d'Annecy-le-Vieux de Physique des Particules, CNRS/IN2P3, 9 chemin de Bellevue, BP 110, 74941 Annecy-le-Vieux Cedex, France
¹⁸ Instytut Fizyki Jądrowej PAN, ul. Radzikowskiego 152, 31-342 Kraków, Poland
¹⁹ Laboratoire de Physique Théorique et Astroparticules, CNRS/IN2P3, Université Montpellier II, CC 70, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
²⁰ Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, 22761 Hamburg, Germany
²¹ School of Physics & Astronomy, University of Leeds, Leeds LS2 9JT, UK
²² Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, 72076 Tübingen, Germany
²³ Toruń Centre for Astronomy, Nicolaus Copernicus University, ul. Gagarina 11, 87-100 Toruń, Poland
²⁴ Institute of Particle and Nuclear Physics, Charles University, V Holesovickach 2, 18000 Prague 8, Czech Republic
²⁵ European Associated Laboratory for Gamma-Ray Astronomy, jointly supported by CNRS and MPG
²⁶ Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ul. Orla 171, 30-244 Kraków, Poland
²⁷ Stanford University, HEPL & KIPAC, Stanford, CA 94305-4085, USA
²⁸ School of Chemistry & Physics, University of Adelaide, Adelaide 5005, Australia
²⁹ Institut für Theoretische Physik, Lehrstuhl IV: Weltraum und Astrophysik, Ruhr-Universität Bochum, 44780 Bochum, Germany
³⁰ University of Namibia, Private Bag 13301, Windhoek, Namibia

Received: 16 November 2008
Accepted: 16 April 2009

Abstract

Aims. Detection of a γ-ray source above 300 GeV is reported, confirming the unidentified source MGRO J1908+06, discovered by the Milagro collaboration at a median energy of 20 TeV.

Methods. The source was observed during 27 h as part of the extension of the HESS Galactic plane survey to longitudes >30°.

Results. HESS J1908+063 is detected at a significance level of 10.9σ with an integral flux above 1 TeV of (3.76 ± ± )10^-12 ph cm^-2 s^-1, and a spectral photon index Γ = 2.10±± 0.2. The positions and fluxes of HESS J1908+063 and MGRO J1908+06 are in good agreement. Possible counterparts at other wavelengths and the origin of the γ-ray emission are discussed. The nearby unidentified GeV source, GRO J1908+0556 (GeV) which also remains unidentified and the new Fermi pulsar 0FGL J1907.5+0617, may be connected to the TeV source.

Key words: gamma rays: observations

© ESO, 2009

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.