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

被引：92
作者：
Albert, J.
Aliu, E.
Anderhub, H.
Antoranz, P.
Armada, A.
Asensio, M.
Baixeras, C.
Barrio, J. A.
Bartko, H.
Bastieri, D.
Becker, J.
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, 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, M. V.
Font, L.
Fuchs, M.
Galante, N.
Garczarczyk, M.
Gaug, M.
机构：
[1] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
[2] Inst Fis Altes Energies, E-08193 Bellaterra, Spain
[3] Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland
[4] Univ Complutense, E-28040 Madrid, Spain
[5] Univ Autonoma Barcelona, E-08193 Barcelona, Spain
[6] Univ Wurzburg, D-97074 Wurzburg, Germany
[7] Univ Lodz, PL-90236 Lodz, Poland
[8] Univ Udine, I-33100 Udine, Italy
[9] Univ Barcelona, E-08028 Barcelona, Spain
[10] Yerevan Phys Inst, Yerevan 375036, Armenia
[11] Tuorla Observ, FI-21500 Piikkio, Finland
[12] Univ Siena, I-53100 Siena, Italy
[13] Univ Calif Davis, Davis, CA 95616 USA
[14] Humboldt Univ, D-12489 Berlin, Germany
[15] Univ Trieste, I-34100 Trieste, Italy
[16] Inst Nucl Energy Res, BG-1784 Sofia, Bulgaria
[17] INAF, I-34131 Trieste, Italy
[18] Univ Pisa, I-56126 Pisa, Italy
[19] CSIC, IEEC, Inst Ciencies Espai, E-08193 Barcelona, Spain
[20] Univ Padua, I-35131 Padua, Italy
[21] Ist Nazl Fis Nucl, I-35131 Padua, Italy
[22] INFN Trieste, I-33100 Udine, Italy
[23] INFN Pisa, I-53100 Siena, Italy
[24] INFN Trieste, I-34100 Trieste, Italy
[25] INFN Triesta, I-34131 Trieste, Italy
[26] INFN Pisa, I-56126 Pisa, Italy
[27] Univ Dortmund, D-44227 Dortmund, Germany
来源：
ASTROPHYSICAL JOURNAL | 2006年 / 648卷 / 02期
关键词：
BL Lacertae objects : individual (Markarian 180); gamma rays : observations;
D O I：
10.1086/508020
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
引用
收藏
页码：L105 / L108
页数：4
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