Discovery of very high energy gamma rays from 1ES 1218+30.4 RID B-5372-2009

Albert, J; Aliu, E; Anderhub, H; Antoranz, P; Armada, A; Asensio, M; Baixeras, C; Barrio, Ja; Bartelt, M; Bartko, H; Bastieri, D; Bavikadi, Sr; Bednarek, W; Berger, K; Bigongiari, C; Biland, A; Bisesi, E; Bock, Rk; Bretz, T; Britvitch, I; Camara, M; Chilingarian, A; Ciprini, S; Coarasa, Ja; Commichau, S; Contreras, Jl; Cortina, J; Curtef, V; Danielyan, V; Dazzi, F; De Angelis, A; de los Reyes, R; De Lotto, B; Domingo Santamaria, E; Dorner, D; Doro, M; Errando, M; Fagiolini, M; Ferenc, D; Fernandez, E; Firpo, R; Flix, J; Fonseca, Mv; 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, J; Lopez, M; Lorenz, E; Lucarelli, F; Majumdar, P; Maneva, G; Mannheim, K; Mariotti, M; Martinez, M; Mase, K; Mazin, D; Meucci, M; Meyer, M; Miranda, Jm; Mirzoyan, R; Mizobuchi, S; Moralejo, A; Nilsson, K; Ona Wilhelmi, E; Orduna, R; Otte, N; Oya, I; Paneque, D; Paoletti, R; Pasanen, M; Pascoli, D; Pauss, F; Pavel, N; Pegna, R; Persic, M; Peruzzo, L; Piccioli, A; Poller, M; Prandini, E; Rhode, W; Rico, J; Riegel, B; Rissi, M; Robert, A; Rugamer, S; Saggion, A; Sanchez, A; Sartori, P; Scalzotto, V; Schmitt, R; Schweizer, T; Shayduk, M; Shinozaki, K; Shore, Steven Neil; Sidro, N; Sillanpaa, A; Sobczynska, D; Stamerra, A; Stark, Ls; Takalo, L; Temnikov, P; Tescaro, D; Teshima, M; Tonello, N; Torres, A; Torres, Df; Turini, N; Vankov, H; Vardanyan, A; Vitale, V; Wagner, Rm; Wibig, T; Wittek, W; Zapatero, J.

doi:10.1086/504845

The MAGIC collaboration has studied the high-frequency-peaked BL Lac object 1ES 1218 + 30.4, at a redshift z = 0.182, using the MAGIC imaging air Cerenkov telescope located on the Canary Island of La Palma. A gamma-ray signal was observed with 6.4 sigma significance. The differential energy spectrum for an energy threshold of 120 GeV can be fitted by a simple power law, yielding F-E = (8.1 +/- 2.1) x 10(-7)[E/(250 GeV)](-3.0 +/- 0.4) TeV-1 F (E) m(-2) s(-1). During the 6 days of observation in 2005 January, no time variability on timescales of days was found within the statistical errors. The observed integral flux above 350 GeV is nearly a factor of 2 below the upper limit reported by the Whipple collaboration in 2003.

Autori interni:	Albert J Aliu E Anderhub H Antoranz P Armada A Asensio M Baixeras C Barrio JA Bartelt M Bartko H Bastieri D Bavikadi SR Bednarek W Berger K Bigongiari C Biland A Bisesi E Bock RK Bretz T Britvitch I Camara M Chilingarian A Ciprini S Coarasa JA Commichau S Contreras JL Cortina J Curtef V Danielyan V Dazzi F De Angelis A de los Reyes R De Lotto B Domingo Santamaria E Dorner D Doro M Errando M Fagiolini M Ferenc D Fernandez E Firpo R Flix J Fonseca MV 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 J Lopez M Lorenz E Lucarelli F Majumdar P Maneva G Mannheim K Mariotti M Martinez M Mase K Mazin D Meucci M Meyer M Miranda JM Mirzoyan R Mizobuchi S Moralejo A Nilsson K Ona Wilhelmi E Orduna R Otte N Oya I Paneque D Paoletti R Pasanen M Pascoli D Pauss F Pavel N Pegna R Persic M Peruzzo L Piccioli A Poller M Prandini E Rhode W Rico J Riegel B Rissi M Robert A Rugamer S Saggion A Sanchez A Sartori P Scalzotto V Schmitt R Schweizer T Shayduk M Shinozaki K SHORE, STEVEN NEIL Sidro N Sillanpaa A Sobczynska D Stamerra A Stark LS Takalo L Temnikov P Tescaro D Teshima M Tonello N Torres A Torres DF Turini N Vankov H Vardanyan A Vitale V Wagner RM Wibig T Wittek W Zapatero J. mostra contributor esterni nascondi contributor esterni
Autori:	Albert J; Aliu E; Anderhub H; Antoranz P; Armada A; Asensio M; Baixeras C; Barrio JA; Bartelt M; Bartko H; Bastieri D; Bavikadi SR; Bednarek W; Berger K; Bigongiari C; Biland A; Bisesi E; Bock RK; Bretz T; Britvitch I; Camara M; Chilingarian A; Ciprini S; Coarasa JA; Commichau S; Contreras JL; Cortina J; Curtef V; Danielyan V; Dazzi F; De Angelis A; de los Reyes R; De Lotto B; Domingo-Santamaria E; Dorner D; Doro M; Errando M; Fagiolini M; Ferenc D; Fernandez E; Firpo R; Flix J; Fonseca MV; 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 J; Lopez M; Lorenz E; Lucarelli F; Majumdar P; Maneva G; Mannheim K; Mariotti M; Martinez M; Mase K; Mazin D; Meucci M; Meyer M; Miranda JM; Mirzoyan R; Mizobuchi S; Moralejo A; Nilsson K; Ona-Wilhelmi E; Orduna R; Otte N; Oya I; Paneque D; Paoletti R; Pasanen M; Pascoli D; Pauss F; Pavel N; Pegna R; Persic M; Peruzzo L; Piccioli A; Poller M; Prandini E; Rhode W; Rico J; Riegel B; Rissi M; Robert A; Rugamer S; Saggion A; Sanchez A; Sartori P; Scalzotto V; Schmitt R; Schweizer T; Shayduk M; Shinozaki K; Shore S.N.; Sidro N; Sillanpaa A; Sobczynska D; Stamerra A; Stark LS; Takalo L; Temnikov P; Tescaro D; Teshima M; Tonello N; Torres A; Torres DF; Turini N; Vankov H; Vardanyan A; Vitale V; Wagner RM; Wibig T; Wittek W; Zapatero J
Titolo:	Discovery of very high energy gamma rays from 1ES 1218+30.4 RID B-5372-2009
Anno del prodotto:	2006
Digital Object Identifier (DOI):	10.1086/504845
Appare nelle tipologie:	1.1 Articolo in rivista

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