Discovery of very high energy gamma-rays from Markarian 180 triggered by an optical outburst.

Albert, J.; Aliu, E.; Anderhub, H.; Antoranz, P.; Armada, A.; Asensio, M.; Baixeras, C.; Barrio, J. A.; Bartelt, M.; Bartko, H.; Bastieri, Denis; Bednarek, W.; Berger, K.; Bigongiari, C.; Biland, A.; Bisesi, E.; Bock, R. K.; Bordas, P.; Bosch Ramon, V.; Bretz, T.; Britvitch, I.; Camara, M.; Carmona, E.; Chilingarian, A.; Ciprini, S.; Coarasa, J. A.; Commichau, S.; Contreras, J. L.; Cortina, J.; Curtef, V.; Danielyan, 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.; Fuchs, M.; Galante, N.; Garczarczyk, M.; Gaug, M.; Giller, M.; Goebel, F.; Hakobyan, D.; Hayashida, M.; Hengstebeck, T.; Hohne, D.; Hose, J.; Hsu, C. C.; Isar, P. G.; Jacon, P.; Kalekin, O.; Kosyra, R.; Kranich, D.; Laatiaoui, M.; Laille, A.; Lenisa, T.; Liebing, P.; Lindfors, E.; Lombardi, Saverio; Longo, F.; Lopez, J.; Lopez, M.; Lorenz, E.; Majumdar, P.; Maneva, G.; Mannheim, K.; Mansutti, O.; Mariotti, Mose'; Martinez, M.; Mase, K.; Daniel, Mazin; Merck, C.; Meucci, M.; Meyer, M.; Miranda, J. M.; Mirzoyan, R.; Mizobuchi, S.; Moralejo, A.; Nilsson, K.; Ninkovic, J.; Ona Wilhelmi, E.; Orduna, R.; Otte, N.; Oya, I.; Paneque, D.; Paoletti, R.; Paredes, J. M.; Pasanen, M.; Pascoli, Donatella; Pauss, F.; Pavel, N.; Pegna, R.; Persic, M.; Peruzzo, Luigi; Piccioli, A.; Poller, M.; Prandini, Elisa; Raymers, A.; Rhode, W.; Ribo, M.; Rico, J.; Riegel, B.; Rissi, M.; Robert, A.; Rugamer, S.; Saggion, Antonio; Sanchez, A.; Sartori, Paolo; Scalzotto, Villi Mario; Scapin, V.; Schmitt, R.; Schweizer, T.; Shayduk, M.; Shinozaki, K.; Shore, S. N.; Sidro, N.; Sillanpaa, A.; Sobczynska, D.; Stamerra, A.; Stark, L. S.; Takalo, L.; Temnikov, P.; Tescaro, D.; Teshima, M.; Tonello, N.; Torres, A.; Torres, D. F.; Turini, N.; Vankov, H.; Vitale, V.; Wagner, R. M.; Wibig, T.; Wittek, W.; Zanin, R.; Zapatero, J.

doi:10.1086/508020

The high-frequency-peaked BL Lacertae object Markarian 180 (Mrk 180) was observed to have an optical outburst in 2006 March, triggering a Target of Opportunity observation with the MAGIC telescope. The source was observed for 12.4 hr, and very high energy gamma-ray emission was detected with a significance of 5.5 sigma. An integral flux above 200 GeV of (2.3 +/- 0.7) x 10(-11) cm(-2) s(-1) was measured, corresponding to 11% of the Crab Nebula flux. A rather soft spectrum with a photon index of has been determined. No significant flux -3.3 x 0.7 variation was found.

Titolo:	Discovery of very high energy gamma-rays from Markarian 180 triggered by an optical outburst.
Autori:	J. ALBERT E. ALIU H. ANDERHUB P. ANTORANZ A. ARMADA M. ASENSIO C. BAIXERAS J. A. BARRIO M. BARTELT H. BARTKO BASTIERI, DENIS W. BEDNAREK K. BERGER C. BIGONGIARI A. BILAND E. BISESI R. K. BOCK P. BORDAS V. BOSCH RAMON T. BRETZ I. BRITVITCH M. CAMARA E. CARMONA A. CHILINGARIAN S. CIPRINI J. A. COARASA S. COMMICHAU J. L. CONTRERAS J. CORTINA V. CURTEF V. DANIELYAN DAZZI, FRANCESCO A. DE ANGELIS R. DE LOS REYES B. DE LOTTO E. DOMINGO SANTAMARIA D. DORNER DORO, MICHELE M. ERRANDO M. FAGIOLINI D. FERENC E. FERNANDEZ R. FIRPO J. FLIX M. V. FONSECA L. FONT M. FUCHS N. GALANTE M. GARCZARCZYK M. GAUG M. GILLER F. GOEBEL D. HAKOBYAN M. HAYASHIDA T. HENGSTEBECK D. HOHNE J. HOSE C. C. HSU P. G. ISAR P. JACON O. KALEKIN R. KOSYRA D. KRANICH M. LAATIAOUI A. LAILLE T. LENISA P. LIEBING E. LINDFORS LOMBARDI, SAVERIO F. LONGO J. LOPEZ M. LOPEZ E. LORENZ P. MAJUMDAR G. MANEVA K. MANNHEIM O. MANSUTTI MARIOTTI, MOSE' M. MARTINEZ K. MASE DANIEL MAZIN C. MERCK M. MEUCCI M. MEYER J. M. MIRANDA R. MIRZOYAN S. MIZOBUCHI A. MORALEJO K. NILSSON J. NINKOVIC E. ONA WILHELMI R. ORDUNA N. OTTE I. OYA D. PANEQUE R. PAOLETTI J. M. PAREDES M. PASANEN PASCOLI, DONATELLA F. PAUSS N. PAVEL R. PEGNA M. PERSIC PERUZZO, LUIGI A. PICCIOLI M. POLLER PRANDINI, ELISA A. RAYMERS W. RHODE M. RIBO J. RICO B. RIEGEL M. RISSI A. ROBERT S. RUGAMER SAGGION, ANTONIO A. SANCHEZ SARTORI, PAOLO SCALZOTTO, VILLI MARIO V. SCAPIN R. SCHMITT T. SCHWEIZER M. SHAYDUK K. SHINOZAKI S. N. SHORE N. SIDRO A. SILLANPAA D. SOBCZYNSKA A. STAMERRA L. S. STARK L. TAKALO P. TEMNIKOV D. TESCARO M. TESHIMA N. TONELLO A. TORRES D. F. TORRES N. TURINI H. VANKOV V. VITALE R. M. WAGNER T. WIBIG W. WITTEK R. ZANIN J. ZAPATERO mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2006
Rivista:	THE ASTROPHYSICAL JOURNAL
Abstract:	The high-frequency-peaked BL Lacertae object Markarian 180 (Mrk 180) was observed to have an optical outburst in 2006 March, triggering a Target of Opportunity observation with the MAGIC telescope. The source was observed for 12.4 hr, and very high energy gamma-ray emission was detected with a significance of 5.5 sigma. An integral flux above 200 GeV of (2.3 +/- 0.7) x 10(-11) cm(-2) s(-1) was measured, corresponding to 11% of the Crab Nebula flux. A rather soft spectrum with a photon index of has been determined. No significant flux -3.3 x 0.7 variation was found.
Handle:	http://hdl.handle.net/11577/121725
Appare nelle tipologie:	01.01 - Articolo in rivista

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