Observation of very high energy gamma-ray emission from the active galactic nucleus 1ES 1959+650 using the magic telescope

被引：65

作者：

Albert, J

Aliu, E

Anderhub, H

Antoranz, P

Armada, A

Asensio, M

Baixeras, C

Barrio, JA

Bartko, H

Bastieri, D

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

Danielyan, V

Dazzi, F

De Angelis, A

De los Reyes, R

De Lotto, B

Domingo-Santamaría, E

Dorner, D

Doro, M

Errando, M

Ferenc, D

Fernández, E

Firpo, R

Flix, J

Fonseca, MV

Font, L

Galante, N

Garczarczyk, M

Gaug, M

Gebauer, J

Giannitrapani, R

Giller, M

Goebel, F

Hakobyan, D

Hayashida, M

Hengstebeck, T

机构：

[1] Univ Wurzburg, D-97074 Wurzburg, Germany

[2] Inst Fis Altes Energies, E-08193 Bellaterra, Spain

[3] ETH Honggerberg, Inst Particle Phys, HPK, CH-8093 Zurich, Switzerland

[4] Univ Complutense Madrid, E-28040 Madrid, Spain

[5] Univ Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Spain

[6] Max Planck Inst Phys & Astrophys, D-80895 Munich, Germany

[7] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy

[8] Ist Nazl Fis Nucl, I-35131 Padua, Italy

[9] Univ Lodz, Div Expt Phys, PL-90236 Lodz, Poland

[10] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy

[11] INFN Trieste, I-33100 Udine, Italy

[12] Yerevan Phys Inst, Cosm Ray Div, AM-375036 Yerevan, Armenia

[13] Tuorla Observ, FI-21500 Piikkio, Finland

[14] Univ Calif Davis, Davis, CA 95616 USA

[15] Univ Siena, Dipartimento Fis, I-53100 Siena, Italy

[16] INFN Pisa, I-53100 Siena, Italy

[17] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[18] Inst Nucl Energy Res, BG-1784 Sofia, Bulgaria

[19] Univ Dortmund, Fachbereich Phys, D-44227 Dortmund, Germany

来源：

ASTROPHYSICAL JOURNAL | 2006年 / 639卷 / 02期

关键词：

galaxies : active; galaxies : individual (1ES 1959+650); gamma rays : observations;

D O I：

10.1086/499421

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The MAGIC Cerenkov telescope has observed very high energy (VHE) gamma-ray emission from the active galactic nucleus 1ES 1959+650 during 6 hr in 2004 September and October. The observations were carried out alternating with observations of the Crab Nebula, whose data were used as a reference source for optimizing gamma -ray/hadron separation and for flux comparison. The data analysis shows VHE gamma-ray emission of 1ES 1959+650 with similar to 8 sigma significance, at a time of low activity in both optical and X-ray wavelengths. An integral flux above similar to 180 GeV of about 20% that of the Crab Nebula was obtained. The light curve, sampled over 7 days, shows no significant variations. The differential energy spectrum between 180 GeV and 2 TeV can be fitted with a power-law of index -2.72 +/- 0.14. The spectrum is consistent with the slightly steeper spectrum seen by HEGRA at higher energies, also during periods of low X-ray activity.

引用

页码：761 / 765

页数：5

共 35 条

[1] Detection of TeV gamma-rays from the BL Lac 1ES 1959+650 in its low states and during a major outburst in 2002 [J].

Aharonian, F ;

Akhperjanian, A ;

Beilicke, M ;

Bernlöhr, K ;

Börst, HG ;

Bojahr, H ;

Bolz, O ;

Coarasa, T ;

Contreras, JL ;

Cortina, J ;

Denninghoff, S ;

Fonseca, MV ;

Girma, M ;

Götting, N ;

Heinzelmann, G ;

Hermann, G ;

Heusler, A ;

Hofmann, W ;

Horns, D ;

Jung, I ;

Kankanyan, R ;

Kestel, M ;

Kohnle, A ;

Konopelko, A ;

Kornmeyer, H ;

Kranich, D ;

Lampeitl, H ;

Lopez, M ;

Lorenz, E ;

Lucarelli, F ;

Mang, O ;

Meyer, H ;

Mirzoyan, R ;

Moralejo, A ;

Ona-Wilhelmi, E ;

Panter, M ;

Plyasheshnikov, A ;

Pühlhofer, G ;

de los Reyes, R ;

Rhode, W ;

Ripken, J ;

Robrade, J ;

Rowell, G ;

Sahakian, V ;

Samorski, M ;

Schilling, M ;

Siems, M ;

Sobzynska, D ;

Stamm, W ;

Tluczykont, M .

ASTRONOMY & ASTROPHYSICS, 2003, 406 (01) :L9-L13

[2] TeV gamma rays from BL Lac objects due to synchrotron radiation of extremely high energy protons [J].

Aharonian, FA .

NEW ASTRONOMY, 2000, 5 (07) :377-395

[3] Sensitivity of the IceCube detector to astrophysical sources of high energy muon neutrinos [J].

Ahrens, J ;

Bahcall, JN ;

Bai, X ;

Bay, RC ;

Becka, T ;

Becker, KH ;

Berley, D ;

Bernardini, E ;

Bertrand, D ;

Besson, DZ ;

Biron, A ;

Blaufuss, E ;

Boersma, DJ ;

Böser, S ;

Bohm, C ;

Botner, O ;

Bouchta, A ;

Bouhali, O ;

Burgess, T ;

Carithers, W ;

Castermans, T ;

Cavin, J ;

Chinowsky, W ;

Chirkin, D ;

Collin, B ;

Conrad, J ;

Cooley, J ;

Cowen, DF ;

Davour, A ;

De Clercq, C ;

DeYoung, T ;

Desiati, P ;

Ehrlich, R ;

Ellsworth, RW ;

Evenson, PA ;

Fazely, AR ;

Feser, T ;

Gaisser, TK ;

Gallagher, J ;

Ganugapati, R ;

Geenen, H ;

Goldschmidt, A ;

Goodman, JA ;

Gunasingha, RM ;

Hallgren, A ;

Halzen, F ;

Hanson, K ;

Hardtke, R ;

Hauschildt, T ;

Hays, D .

ASTROPARTICLE PHYSICS, 2004, 20 (05) :507-532

[4] Commissioning and first tests of the MAGIC telescope [J].

Baixeras, C ;

Bastieri, D ;

Bigongiari, C ;

Blanch, O ;

Blanchot, G ;

Bock, R ;

Bretz, T ;

Chilingarian, A ;

Coarasa, JA ;

Colombo, E ;

Contreras, JC ;

Corti, D ;

Cortina, J ;

Domingo, C ;

Domingo, E ;

Ferenc, D ;

Fernández, E ;

Flix, J ;

Fonseca, V ;

Font, L ;

Galante, N ;

Gaug, M ;

Garczarczyk, M ;

Gebauer, J ;

Giller, M ;

Goebel, F ;

Hengstebeck, T ;

Jacone, P ;

de Jager, OC ;

Kalekin, O ;

Kestel, M ;

Kneiske, T ;

Laille, A ;

López, M ;

López, J ;

Lorenz, E ;

Mannheim, K ;

Mariotti, M ;

Martínez, M ;

Mase, K ;

Merck, M ;

Meucci, A ;

Miralles, L ;

Mirzoyan, R ;

Moralejo, A ;

Wilhelmi, EO ;

Orduña, R ;

Paneque, D ;

Paoletti, R ;

Pascoli, D .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2004, 518 (1-2) :188-192

[5]

BERNARDINI E, 2006, IN PRESS NETWORK ATM, V7

[6] Methods for multidimensional event classification: a case study using images from a Cherenkov gamma-ray telescope [J].

Bock, RK ;

Chilingarian, A ;

Gaug, M ;

Hakl, F ;

Hengstebeck, T ;

Jirina, M ;

Klaschka, J ;

Kotrc, E ;

Savicky, P ;

Towers, S ;

Vaiclulis, A ;

Wittek, W .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2004, 516 (2-3) :511-528

[7]

BOETTCHER M, 2005, APJ, V621, P176

[8] Random forests [J].

Breiman, L .

MACHINE LEARNING, 2001, 45 (01) :5-32

[9]

CORTINA J, 2005, P 29 INT COSM RAY C

[10] Spectrum of very high energy gamma-rays from the blazar 1ES 1959+650 during flaring activity in 2002 [J].

Daniel, MK ;

Badran, HM ;

Bond, IH ;

Boyle, PJ ;

Bradbury, SM ;

Buckley, JH ;

Carter-Lewis, DA ;

Catanese, M ;

Celik, O ;

Cogan, P ;

Cui, W ;

D'Vali, M ;

Perez, ID ;

Duke, C ;

Falcone, A ;

Fegan, DJ ;

Fegan, SJ ;

Finley, JP ;

Fortson, LF ;

Gaidos, JA ;

Gammell, S ;

Gibbs, K ;

Gillanders, GH ;

Grube, J ;

Hall, J ;

Hall, TA ;

Hanna, D ;

Hillas, AM ;

Holder, J ;

Horan, D ;

Humensky, TB ;

Jarvis, A ;

Jordan, M ;

Kenny, GE ;

Kertzman, M ;

Kieda, D ;

Kildea, J ;

Knapp, J ;

Kosack, K ;

Krawczynski, H ;

Krennrich, F ;

Lang, MJ ;

Le Bohec, S ;

Linton, E ;

Lloyd-Evans, J ;

Milovanovic, A ;

Moriarty, P ;

Müller, D ;

Nagai, T ;

Nolan, S .

ASTROPHYSICAL JOURNAL, 2005, 621 (01) :181-187

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