MAGIC detection of short-term variability of the high-peaked BL Lac object lES 0806+524

被引：26

作者：

Aleksic, J. ^{[1
]}

Ansoldi, S. ^{[2
,3
]}

Antonelli, L. A. ^{[4
]}

Antoranz, P. ^{[5
,6
]}

Babic, A. ^{[7
,8
,9
]}

Bangale, P. ^{[9
]}

Barrio, J. A. ^{[10
]}

Becerra Gonzalez, J. ^{[11
,46
,47
,48
]}

Bednarek, W. ^{[12
]}

Bernardini, E. ^{[13
]}

Biasuzzi, B. ^{[2
,3
]}

Biland, A. ^{[14
]}

Blanch, O. ^{[1
]}

Bonnefoy, S. ^{[10
]}

Bonnoli, G. ^{[4
]}

Borracci, F. ^{[9
]}

Bretz, T. ^{[15
,49
]}

Carmona, E. ^{[16
]}

Carosi, A. ^{[4
]}

Colin, P. ^{[9
]}

Colombo, E. ^{[11
]}

Contreras, J. L. ^{[10
]}

Cortina, J. ^{[1
]}

Covino, S. ^{[4
]}

Da Vela, P. ^{[5
,6
]}

Dazzi, F. ^{[9
]}

De Angelis, A. ^{[2
,3
]}

De Caneva, G. ^{[13
]}

De Lotto, B. ^{[2
,3
]}

de Ona Wilhelmi, E. ^{[17
]}

Delgado Mendez, C. ^{[16
]}

Di Pierro, F. ^{[4
]}

Prester, D. Dominis ^{[7
,8
]}

Dorner, D. ^{[15
]}

Doro, M. ^{[18
,19
]}

Einecke, S. ^{[20
]}

Eisenacher, D. ^{[15
]}

Elsaesser, D. ^{[15
]}

Fernandez-Barral, A. ^{[1
]}

Fidalgo, D. ^{[10
]}

Fonseca, M. V. ^{[10
]}

Font, L. ^{[21
,22
]}

Frantzen, K. ^{[20
]}

Fruck, C. ^{[9
]}

Galindo, D. ^{[23
]}

Garcia Lopez, R. J. ^{[11
]}

Garczarczyk, M. ^{[13
]}

Garrido Terrats, D. ^{[21
,22
]}

Gaug, M. ^{[21
,22
]}

Godinovic, N. ^{[7
,8
]}

机构：

[1] IFAE, Campus UAB, E-08193 Bellaterra, Spain

[2] Univ Udine, I-33100 Udine, Italy

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

[4] INAF Natl Inst Astrophys, I-00136 Rome, Italy

[5] Univ Siena, I-53100 Siena, Italy

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

[7] Univ Rijeka, Rudjer Boskovic Inst, Croatian MAGIC Consortium, HR-10000 Zagreb, Croatia

[8] Univ Split, HR-10000 Zagreb, Croatia

[9] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

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

[11] Inst Astrofis Canarias, E-38200 Tenerife, Spain

[12] Univ Lodz, PL-90236 Lodz, Poland

[13] DESY, D-15738 Zeuthen, Germany

[14] ETH, CH-8093 Zurich, Switzerland

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

[16] Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain

[17] Inst Space Sci, E-08193 Barcelona, Spain

[18] Univ Padua, I-35131 Padua, Italy

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

[20] Tech Univ Dortmund, D-44221 Dortmund, Germany

[21] Univ Autonoma Barcelona, Dept Fis, Unitat Fis Radiac, E-08193 Bellaterra, Spain

[22] Univ Autonoma Barcelona, CERES IEEC, E-08193 Bellaterra, Spain

[23] Univ Barcelona, ICC, IEEC UB, E-08028 Barcelona, Spain

[24] KEK, Dept Phys, Japanese MAGIC Consortium, Tokyo, Japan

[25] Univ Tokyo, Tokai Univ, Kyoto Univ, Hakubi Ctr,Univ Tokushima,ICRR, Tokyo 1138654, Japan

[26] Univ Turku, Finnish MAGIC Consortium, Tuorla Observ, SF-20500 Turku, Finland

[27] Univ Oulu, Dept Phys, SF-90100 Oulu, Finland

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

[29] INAF Trieste, I-34131 Trieste, Italy

[30] Univ Pisa, I-56126 Pisa, Italy

[31] INFN Pisa, I-56126 Pisa, Italy

[32] ISDC Sci Data Ctr Astrophys, CH-1290 Geneva, Switzerland

[33] ICREA, E-08193 Barcelona, Spain

[34] Inst Space Sci, E-08193 Barcelona, Spain

[35] Univ Insubria, I-22100 Como, Como, Italy

[36] INFN Milano Bicocca, I-22100 Como, Como, Italy

[37] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[38] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA

[39] INAF IRA Bologna, I-40129 Bologna, Italy

[40] Agenzia Spaziale Italiana, Sci Data Ctr, I-00044 Rome, Italy

[41] Osserv Astron Roma, Ist Nazl Astrofis, I-00040 Rome, Italy

[42] Aalto Univ, Metsahovi Radio Observ, FI-02540 Kylmala, Finland

[43] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA

[44] Natl Radio Astron Observ, Socorro, NM 87801 USA

[45] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

[46] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[47] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[48] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[49] Ecole Polytech Fed Lausanne, Lausanne, Switzerland

[50] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2015年 / 451卷 / 01期

基金：

芬兰科学院;

关键词：

radiation mechanisms: non-thermal; galaxies: active-BL; Lacertae objects: individual: 1ES 0806+524; galaxies: jets; gamma rays: galaxies; ENERGY GAMMA-RAYS; EXTRAGALACTIC BACKGROUND LIGHT; LARGE-AREA TELESCOPE; LACERTAE OBJECTS; PKS; 2155-304; CRAB-NEBULA; EMISSION; FERMI; DISCOVERY; RADIATION;

D O I：

10.1093/mnras/stv895

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The high-frequency-peaked BL Lac (HBL) 1ES 0806+524 (z = 0.138) was discovered in very high energy (VHE) gamma-rays in 2008. Until now, the broad-band spectrum of lES 0806+524 has been only poorly characterized, in particular at high energies. We analysed multiwave-length observations from gamma-rays to radio performed from 2011 January to March, which were triggered by the high activity detected at optical frequencies. These observations constitute the most precise determination of the broad-band emission of ES 0806+524 to date. The stereoscopic Major Atmospheric Gamma-Ray Imaging Cherenkov (MAGIC) observations yielded a gamma-ray signal above 250 GeV of (3.7 +/- 0.7) per cent of the Crab Nebula flux with a statistical significance of 9.9a. The multiwavelength observations showed significant variability in essentially all energy bands, including a VHE gamma-ray flare that lasted less than one night, which provided unprecedented evidence for short-term variability in lES 0806+524. The spectrum of this flare is well described by a power law with a photon index of 2.97 +/- 0.29 between similar to 150 GeV and 1 TeV and an integral flux of (9.3 +/- 1.9) per cent of the Crab nebula flux above 250 GeV. The spectrum during the non-flaring VHE activity is compatible with the only available VHE observation performed in 2008 with VERITAS when the source was in a low optical state. The broad-band spectral energy distribution can be described with a one-zone synchrotron self-Compton model with parameters typical for HBLs, indicating that lES 0806+524 is not substantially different from the HBLs previously detected.

引用

页码：739 / 750

页数：12

共 78 条

[41] Infrared to X-ray observations of PKS 2155-304 in a low state [J].

Foschini, L. ;

Treves, A. ;

Tavecchio, F. ;

Impiombato, D. ;

Ghisellini, G. ;

Covino, S. ;

Tosti, G. ;

Gliozzi, M. ;

Bianchin, V. ;

Di Cocco, G. ;

Malaguti, G. ;

Maraschi, L. ;

Pian, E. ;

Raiteri, C. M. ;

Sambruna, R. M. ;

Tagliaferri, G. ;

Villata, M. .

ASTRONOMY & ASTROPHYSICS, 2008, 484 (03) :L35-L38

[42] X-ray/UV/optical follow-up of the blazar PKS 2155-304 after the giant TeV flares of 2006 July [J].

Foschini, L. ;

Ghisellini, G. ;

Tavecchio, F. ;

Treves, A. ;

Maraschi, L. ;

Gliozzi, M. ;

Raiteri, C. M. ;

Villata, M. ;

Pian, E. ;

Tagliaferri, G. ;

Tosti, G. ;

Sambruna, R. M. ;

Malaguti, G. ;

Di Cocco, G. ;

Giommi, P. .

ASTROPHYSICAL JOURNAL, 2007, 657 (02) :L81-L84

[43] Extragalactic optical-infrared background radiation, its time evolution and the cosmic photon-photon opacity [J].

Franceschini, A. ;

Rodighiero, G. ;

Vaccari, M. .

ASTRONOMY & ASTROPHYSICS, 2008, 487 (03) :837-852

[44] Extremely rapid bursts of TeV photons from the active galaxy Markarian 421 [J].

Gaidos, JA ;

Akerlof, CW ;

Biller, S ;

Boyle, PJ ;

Breslin, AC ;

Buckley, JH ;

CarterLewis, DA ;

Catanese, M ;

Cawley, MF ;

Fegan, DJ ;

Finley, JP ;

Gordo, JB ;

Hillas, AM ;

Krennrich, F ;

Lamb, RC ;

Lessard, RW ;

McEnery, JE ;

Masterson, C ;

Mohanty, G ;

Moriarty, P ;

Quinn, J ;

Rodgers, AJ ;

Rose, HJ ;

Samuelson, F ;

Schubnell, MS ;

Sembroski, GH ;

Srinivasan, R ;

Weekes, TC ;

Wilson, CL ;

Zweerink, J .

NATURE, 1996, 383 (6598) :319-320

[45] The Swift gamma-ray burst mission [J].

Gehrels, N ;

Chincarini, G ;

Giommi, P ;

Mason, KO ;

Nousek, JA ;

Wells, AA ;

White, NE ;

Barthelmy, SD ;

Burrows, DN ;

Cominsky, LR ;

Hurley, KC ;

Marshall, FE ;

Mészáros, P ;

Roming, PWA ;

Angelini, L ;

Barbier, LM ;

Belloni, T ;

Campana, S ;

Caraveo, PA ;

Chester, MM ;

Citterio, O ;

Cline, TL ;

Cropper, MS ;

Cummings, JR ;

Dean, AJ ;

Feigelson, ED ;

Fenimore, EE ;

Frail, DA ;

Fruchter, AS ;

Garmire, GP ;

Gendreau, K ;

Ghisellini, G ;

Greiner, J ;

Hill, JE ;

Hunsberger, SD ;

Krimm, HA ;

Kulkarni, SR ;

Kumar, P ;

Lebrun, F ;

Lloyd-Ronning, NM ;

Markwardt, CB ;

Mattson, BJ ;

Mushotzky, RF ;

Norris, JP ;

Osborne, J ;

Paczynski, B ;

Palmer, DM ;

Park, HS ;

Parsons, AM ;

Paul, J .

ASTROPHYSICAL JOURNAL, 2004, 611 (02) :1005-1020

[46] Decelerating flows in TeV blazars: A resolution to the BL Lacertae-FR I unification problem [J].

Georganopoulos, M ;

Kazanas, D .

ASTROPHYSICAL JOURNAL, 2003, 594 (01) :L27-L30

[47] Structured jets in TeVBL Lac objects and radiogalaxies - Implications for the observed properties [J].

Ghisellini, G ;

Tavecchio, F ;

Chiaberge, M .

ASTRONOMY & ASTROPHYSICS, 2005, 432 (02) :401-410

[48] General physical properties of bright Fermi blazars [J].

Ghisellini, G. ;

Tavecchio, F. ;

Foschini, L. ;

Ghirlanda, G. ;

Maraschi, L. ;

Celotti, A. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2010, 402 (01) :497-518

[49] Semi-analytic modelling of the extragalactic background light and consequences for extragalactic gamma-ray spectra [J].

Gilmore, Rudy C. ;

Somerville, Rachel S. ;

Primack, Joel R. ;

Dominguez, Alberto .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2012, 422 (04) :3189-3207

[50]

Hillas A.M., 1985, INT COSM RAY C ICRC1, V3, P445

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