Magic observations of very high energy gamma-rays from HESS J1813-178

Albert, J.; Aliu, E.; Anderhub, H.; Antoranz, P.; Armada, A.; Asensio, M.; Baixeras, C.; Barrio, J. A.; Bartelt, M.; Bartko, H.; Bastieri, Denis; Bavikadi, R.; Bednarek, W.; Berger, K.; Bigongiari, Ciro; Biland, A.; Bisesi, E.; Bock, R. K.; Bretz, T.; Britvitch, I.; Camara, M.; Chilingarian, A.; Ciprini, S.; Coarasa, J. A.; Commichau, S.; Contreras, J. L.; Cortina, J.; Curtef, V.; Daneilyan, V.; Dazzi, Francesco; DE ANGELIS, A.; DE LOS REYES, R.; DE LOTTO, B.; DOMINGO SANTAMARIA, E.; Dorner, D.; Doro, Michele; Errando, M.; Fagiolini, M.; Ferenc, D.; Fernandez, E.; Firpo, R.; Flix, J.; Fonseca, M. V.; Font, L.; Galante, N.; Garczarczyk, M.; Gaug, M.; Giller, M.; Goebel, F.; Hakobyan, D.; Hayashida, M.; Hengstebeck, T.; Hohne, D.; Hose, J.; Jacon, P.; Kalekin, O.; Kranich, D.; Laille, A.; Lenisa, T.; Liebing, P.; Lindfors, E.; Longo, F.; Lopez, M.; Lopez, J.; Lorenz, E.; Lucarelli, F.; Majumdar, P.; Maneva, G.; Mannheim, K.; Mariotti, Mose'; Martinez, M.; Mase, K.; Mazin, D.; Merck, M.; Meucci, M.; Meyer, M.; Mirzoyan, R.; Mizobuchi, S.; Moralejo, A.; Nilsson, K.; ONA WILHELMI, E.; Orduna, R.; Otte, N.; Oya, I.; Paneque, D.; Paoletti, R.; Pasanen, M.; Pascoli, Donatella; Pauss, F.; Pavel, N.; Pegna, R.; Peruzzo, Luigi; Piccioli, A.; Prandini, E.; Rico, J.; Rhode, W.; Riegel, B.; Rissi, M.; Robert, A.; Rugamer, S.; Saggion, Antonio; Sanchez, A.; Sartori, Paolo; Scalzotto, V.; Schmitt, R.; Schweizer, T.; Shayduk, M.; Shinozaki, K.; Shore, S. N.; Sidro, N.; Sillanpaa, A.; Sobczynska, D.; Stamerra, A.; Stepanian, A.; Stark, L. S.; Takalo, L.; Temnikov, P.; Tescaro, D.; Teshima, M.; Tonello, N.; Torres, A.; Torres, DIEGO F.; Turini, N.; Vankov, H.; Vardanyan, A.; Vitale, V.; Wagner, R.; Wibig, T.; Wittek, W.; Zapatero, J.

doi:10.1086/500364

Recently, the HESS collaboration has reported the detection of gamma-ray emission above a few hundred GeV from eight new sources located close to the Galactic plane. The source HESS J1813-178 has sparked particular interest, as subsequent radio observations imply an association with supernova remnant G12.82-0.02. Triggered by the detection in very high energy gamma-rays, a positionally coincident source has also been found in INTEGRAL and ASCA data. In this Letter we present MAGIC observations of HESS J1813-178, resulting in the detection of a differential gamma-ray flux consistent with a hard-slope power law, described as dN(gamma)/(dA dt dE) = (3.3 +/- 0.5) x 10(-12)(E/TeV)(-2.1 +/- 0.2) cm(-2) s(-1) TeV-1. We briefly discuss the observational technique used and the procedure implemented for the data analysis, and we put this detection in the perspective of multifrequency observations.