%0 Journal Article %T Discovery of VHE gamma-rays from the high-frequency-peaked BL Lac object RGB J0152+017 %+ Centre d'étude spatiale des rayonnements (CESR) %+ Laboratoire Univers et Théories (LUTH (UMR_8102)) %+ Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA) %+ Laboratoire d'Astrophysique de Grenoble (LAOG) %+ Laboratoire Leprince-Ringuet (LLR) %+ Laboratoire d'Annecy de Physique des Particules (LAPP) %+ APC - Astrophysique des Hautes Energies (APC - AHE) %+ AstroParticule et Cosmologie (APC (UMR_7164)) %+ Laboratoire de Physique Théorique et Astroparticules (LPTA) %+ Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE) %A Aharonian, F. %A Akhperjanian, A.G. %A Bazer-Bachi, A.R. %A Behera, B. %A Beilicke, M. %A Benbow, W. %A Berge, D. %A Bernlöhr, K. %A Boisson, C. %A Bolz, O. %A Borrel, V. %A Braun, I. %A Brion, E. %A Brown, A.M. %A Bühler, R. %A Bulik, T. %A Büsching, I. %A Boutelier, T. %A Carrigan, S. %A Chadwic, P.M. %A Chounet, L.-M. %A Clapson, A.C. %A Coignet, G. %A Cornils, R. %A Costamante, L. %A Degrange, B. %A Dickinson, H.J. %A Djannati-Ataï, A. %A Domainko, W. %A Drury, L.O'C. %A Dubus, G. %A Dyks, J. %A Egberts, K. %A Emmanoulopoulos, D. %A Espigat, P. %A Farnier, C. %A Feinstein, F. %A Fiasson, A. %A F¨orster, A. %A Fontaine, G. %A Fukui, Y. %A Funk, Seb. %A Funk, S. %A Füssling, M. %A Gallant, Y.A. %A Giebels, B. %A Glicenstein, J.F. %A Glück, B. %A Goret, P. %A Hadjichristidis, C. %A Hauser, D. %A Hauser, M. %A Heinzelmann, G. %A Henri, G. %A Hermann, G. %A Hinton, J.A. %A Hoffmann, A. %A Hofmann, W. %A Holleran, M. %A Hoppe, S. %A Horns, D. %A Jacholkowska, A. %A de Jager, O.C. %A Kendziorra, E. %A Kerschhagg, M. %A Khélifi, B. %A Komin, Nu. %A Kosack, K. %A Lamanna, G. %A Latham, I.J. %A Le Gallou, R. %A Lemière, A. %A Lemoine-Goumard, M. %A Lenain, J.-P. %A Lohse, T. %A Martin, J.M. %A Martineau-Huynh, O. %A Marcowith, A. %A Masterson, C. %A Maurin, G. %A Mccomb, T.J.L. %A Moderski, R. %A Moriguchi, Y. %A Moulin, Emmanuel %A de Naurois, M. %A Nedbal, D. %A Nolan, S.J. %A Olive, J.-P. %A Orford, K.J. %A Osborne, J.L. %A Ostrowski, M. %A Panter, M. %A Pedaletti, G. %A Pelletier, G. %A Petrucci, P.-O. %A Pita, S. %A P¨uhlhofer, G. %A Punch, M. %A Ranchon, S. %A Raubenheimer, B.C. %A Raue, M. %A Rayner, S.M. %A Reimer, O. %A Renaud, M. %A Ripken, J. %A Rob, L. %A Rolland, L. %A Rosier-Lees, S. %A Rowell, G. %A Rudak, B. %A Ruppel, J. %A Sahakian, V. %A Santangelo, A. %A Saugé, L. %A Schlenker, S. %A Schlickeiser, R. %A Schroder, R. %A Schwanke, U. %A Schwarzburg, S. %A Schwemmer, S. %A Shalchi, A. %A Sol, H. %A Spangler, D. %A Stawarz, Ł. %A Steenkamp, R. %A Stegmann, C. %A Superina, G. %A Takeuchi, T. %A Tam, P.H. %A Tavernet, J.-P. %A Terrier, R. %A van Eldik, C. %A Vasileiadis, G. %A Venter, C. %A Vialle, J.P. %A Vincent, P. %A Vivier, M. %A Volk, H.J. %A Volpe, F. %A Wagner, S.J. %A Ward, M. %Z 6 pages, 2 figures; Accepted for publication in A&A on February 20, 2008 %< avec comité de lecture %@ 0004-6361 %J Astronomy and Astrophysics - A&A %I EDP Sciences %V 481 %P L103-L107 %8 2008-02 %D 2008 %Z 0802.4021 %Z 2008arXiv0802.4021H %R 10.1051/0004-6361:200809603 %Z Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] %Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] %Z Sciences of the Universe [physics]/Astrophysics [astro-ph]Journal articles %X Aims: The BL Lac object RGB J0152+017 (z=0.080) was predicted to be a very high-energy (VHE; > 100 GeV) gamma-ray source, due to its high X-ray and radio fluxes. Our aim is to understand the radiative processes by investigating the observed emission and its production mechanism using the High Energy Stereoscopic System (H.E.S.S.) experiment. Methods: We report recent observations of the BL Lac source RGB J0152+017 made in late October and November 2007 with the H.E.S.S. array consisting of four imaging atmospheric Cherenkov telescopes. Contemporaneous observations were made in X-rays by the Swift and RXTE satellites, in the optical band with the ATOM telescope, and in the radio band with the Nancay Radio Telescope. Results: A signal of 173 gamma-ray photons corresponding to a statistical significance of 6.6 sigma was found in the data. The energy spectrum of the source can be described by a powerlaw with a spectral index of 2.95+/-0.36stat+/-0.20syst. The integral flux above 300 GeV corresponds to ~2% of the flux of the Crab nebula. The source spectral energy distribution (SED) can be described using a two-component non-thermal synchrotron self-Compton (SSC) leptonic model, except in the optical band, which is dominated by a thermal host galaxy component. The parameters that are found are very close to those found in similar SSC studies in TeV blazars. Conclusions: RGB J0152+017 is discovered as a source of VHE gamma-rays by H.E.S.S. The location of its synchrotron peak, as derived from the SED in Swift data, allows clearly classification it as a high-frequency-peaked BL Lac (HBL). %G English %Z HESS %L in2p3-00263434 %U https://hal.in2p3.fr/in2p3-00263434 %~ IN2P3 %~ OBSPM %~ CEA %~ INSU %~ METEO %~ UNIV-PARIS7 %~ X %~ UNIV-SAVOIE %~ UPMC %~ UNIV-TLSE3 %~ UGA %~ LPTA %~ LAPP %~ LLR %~ LPNHE %~ APC %~ CNRS %~ UNIV-GRENOBLE1 %~ UNIV-MONTP2 %~ CNES %~ OSUG %~ LUTH %~ OMP %~ OMP-CESR %~ OMP-IRAP %~ X-LLR %~ LAOG %~ X-DEP %~ X-DEP-PHYS %~ DSM-IRFU %~ IRFU-APC %~ PSL %~ UPMC_POLE_2 %~ UNIV-MONTPELLIER %~ CEA-DRF %~ SORBONNE-UNIVERSITE %~ SU-SCIENCES %~ UNIV-PARIS %~ UP-SCIENCES %~ OBSPM-PSL %~ USMB-COMUE %~ SU-TI %~ ALLIANCE-SU %~ UNIV-UT3 %~ UT3-INP %~ UT3-TOULOUSEINP %~ UM1-UM2 %~ LPNHE-2