VHE gamma-ray detection of FSRQ QSO B1420+326 and modeling of its enhanced broadband state in 2020
VHE gamma-ray detection of FSRQ QSO B1420+326 and modeling of its enhanced broadband state in 2020
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DOI：
10.1051/0004-6361/202039687
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发表时间：
2020-12
影响因子：
6.5
通讯作者：
V. Acciari;S. Ansoldi;L. A. Antonelli;A. A. Engels-A.;M. Artero;K. Asano;D. Baack;A. Babi'c;A. Baquero;U. D. Almeida;J. Barrio;J. Gonz'alez;W. Bednarek;L. Bellizzi;E. Bernardini;M. Bernardos;A. Berti;J. Besenrieder;W. Bhattacharyya;C. Bigongiari;A. Biland;O. Blanch;G. Bonnoli;vZ. Bovsnjak;G. Busetto;R. Carosi;G. Ceribella;M. Cerruti;Y. Chai;A. Chilingarian;S. Cikota;S. M. Colak;E. Colombo;J. Contreras;J. Cortina;S. Covino;Giacomo D’Amico;V. D’Elia;P. D. Vela;F. Dazzi;A. Angelis;B. Lotto;M. Delfino;J. Delgado;C. Mendez;D. Depaoli;F. D. Pierro;L. Venere;E. Espineira;D. Prester;A. Donini;D. Dorner;M. Doro;D. Elsaesser;V. Ramazani;A. Fattorini;G. Ferrara;L. Foffano;M. Fonseca;L. Font;C. Fruck;S. Fukami;R. L'opez;M. Garczarczyk;S. Gasparyan;M. Gaug;N. Giglietto;F. Giordano;P. Gliwny;N. Godinovi'c;J. Green;D. Green;D. Hadasch;A. Hahn;L. Heckmann;J. Herrera;J. Hoang;D. Hrupec;M. Hutten;T. Inada;S. Inoue;K. Ishio;Y. Iwamura;J. Jormanainen;L. Jouvin;Y. Kajiwara;M. Karjalainen;D. Kerszberg;Y. Kobayashi;H. Kubo;J. Kushida;A. Lamastra;D. Lelas;F. Leone;E. Lindfors;S. Lombardi;F. Longo;R. L'opez-Coto;M. L'opez-Moya;A. L'opez-Oramas;S. Loporchio;B. Fraga;C. Maggio;P. Majumdar;M. Makariev;M. Mallamaci;G. Maneva;M. Manganaro;K. Mannheim;L. Maraschi;M. Mariotti;M. Mart'inez;D. Mazin;S. Mender;S. Mi'canovi'c;D. Miceli;T. Miener;M. Minev;J. Miranda;R. Mirzoyan;E. Molina;A. Moralejo;D. Morcuende;V. Moreno;E. Moretti;V. Neustroev;C. Nigro;K. Nilsson;D. Ninci;K. Nishijima;K. Noda;S. Nozaki;Y. Ohtani;T. Oka;J. Otero-Santos;S. Paiano;M. Palatiello;D. Paneque;R. Paoletti;J. Paredes;L. Pavleti'c;P. Peñil;C. Perennes;M. Persic;P. Moroni;E. Prandini;C. Priyadarshi;I. Puljak;W. Rhode;M. Rib'o;J. Rico;C. Righi;A. Rugliancich;L. Saha;N. Sahakyan;T. Saito;S. Sakurai;K. Satalecka;F. G. Saturni;B. Schleicher;K. Schmidt;T. Schweizer;J. Sitarek;I. vSnidari'c;D. Sobczynska;A. Spolon;A. Stamerra;D. Strom;M. Strzys;Y. Suda;T. Suri'c;M. Takahashi;F. Tavecchio;P. Temnikov;T. Terzi'c;M. Teshima;N. Torres-Albà;L. Tosti;S. Truzzi;A. Tutone;J. Scherpenberg;G. Vanzo;M. Acosta;S. Ventura;V. Verguilov;C. Vigorito;V. Vitale;I. Vovk;M. Will;D. Z. R. Angioni;F. D’Ammando;S. Ciprini;C. Cheung;M. Orienti;L. Pacciani;P. Prajapati;P. Kumar;S. Ganesh;A. Kurtenkov;A. Marchini;L. Carrasco;G. Escobedo;A. Porras;E. Recillas;A. Lahteenmaki;M. Tornikoski;M. Berton;J. Tammi;R. J. C. Vera;S. Jorstad;A. Marscher;Z. Weaver;M. Hart;M. K. Hallum V. M. Larionov-M.-K.-Hallum-V.-M.-Larionov;G. Borman;T. Grishina;E. Kopatskaya;E. Larionova;A. Nikiforova;D. Morozova;S. Savchenko;Y. Troitskaya;I. Troitsky;A. Vasilyev;M. Hodges;T. Hovatta;S. Kiehlmann;W. Max-Moerbeck;A. Readhead;R. Reeves;T. K. I. D. A. D. Canarias-T.-K.-I.-D.-A.-D.-Canarias-2039902423;La Laguna;U. L. Laguna;D. Astrof'isica;E-38200 La Laguna;Tenerife;Spain Universita di Udine;I. Trieste;I. Udine;I. I. I. O. Astrophysics-I.-I.;I. Rome;Italy Eth Zurich;CH-8093 Zurich;Switzerland Institut de F'isica d'Altes Energies;T. Science;Technology;E-08193 Bellaterra;S. I. F. N. Research;T. U. O. Tokyo;Kashiwa;277-8582 Chiba;Japan Technische Universitat Dortmund;D. Dortmund;Germany Croatian Magic Group University of Zagreb;Faculty of Electrical Engineering;Computing;10000 Zagreb;Croatia Iparcos Institute;Emftel Department;U. Madrid;E. Madrid;S. C. B. D. P. F'isicas;22290-180 Urca;R. Janeiro;Brazil University of Lodz;F. O. Physics;Applied Informatics;D. O. Astrophysics;9. Lodz;Poland Universita di Siena;I. Pisa;I-53100 Siena;Italy Deutsches Elektronen-Synchrotron;D. Zeuthen;Germany Universita di Padova;Infn;I-35131 Padova;I. Torino;U. Torino;10125 Torino;I. M. F. Physik;D-80805 Munchen;G. Pisa;I. Pisa;I. U. D. Barcelona;Iccub;IEEC-UB;E. Barcelona;S. A. M. G. A. A. N. S. Energ'eticas-S.-A.-M.-G.-A.-A.-N.-S.-Energ'eticas-2039907171;Medioambientales y Tecnol'ogicas;Spain Infn Magic Group Infn Sezione di Bari-Spain-Infn-Magic-Group-Infn-Sezione-di-Bari-2039908634;D. Bari;70125 Bari;Italy Croatian Magic Group University of Rijeka;D. Physics;51000 Rijeka;Croatia Universitat Wurzburg;D-97074 Wurzburg;Germany Eso;U. Turku;F. Turku;Finland Departament de F'isica;CERES-IEEC;U. Barcelona;Spain Armenian Magic Group ICRANet-Armenia at Nas RA Cro Split-Spain-Armenian-Magic-Group-ICRANet-Armenia-at-Nas-2039908753;M. Engineering;Naval Architecture;21000 Split;Croatia Croatian Magic Group Josip Juraj Strossmayer Unive Osijek-Croatia-Croatian-Magic-Group-Josip-Juraj-Unive-2039909256;31000 Osijek;C. H. G. D. O. Physics;Kyoto University;606-8502 Kyoto;J. D. O. Physics;T. University;Hiratsuka;259-1292 Kanagawa;J. D. O. Physics;Hbni;1. Bidhannagar;Salt Lake;Sector-1;Kolkata 700064;India UGC-DAE Consortium for Scientific Research;Nucl. Energy;Bulgarian academy of Sciences;BG-1784 Sofia;Bulgaria Finnish Magic Group Astronomy Research Unit-Bulgaria-Finnish-Magic-Group-Astronomy-Research-2039908829;U. Oulu;F. Oulu;Finland Croatian Magic Group Rudjer Bovskovi'c Institute-Finland-Croatian-Magic-Group-Rudjer-Bovskovi'c-2039910324;Croatia Infn Magic Group Infn Sezione di Perugia-Croatia-Infn-Magic-Group-Infn-Sezione-di-Perugia-2039909475;06123 Perugia;Italy Infn Magic Group Infn Roma Tor Vergata-Italy-Infn-Magic-Group-Infn-Roma-Tor-Vergata-2039910031;00133 Roma;Italy now at University of Innsbruck also at Port d'Info Fisica-Italy-now-at-University-of-Innsbruck-also-at-Port-2040067092;Universita di UdineI.N.F.N. Trieste;Inaf Trieste;Germany also at Inaf Trieste;D. Physics;Astronomy;University Research;Japan Asi Space Science Data Center;V. Politecnico;S. I. R. -. I. I. -. R. T. Vergata-S.-I.-R.-.-I.-I.-.-R.-T.-Vergata-2039908718;V. R. Scientifica;1. I. R. -. I. I. -. I. Bologna-1.-I.-R.-.-I.-I.-.-I.-Bologna-2039912221;V. G. 101;I-40129;Bologna;I. Nucleare;S. Perugia;I. Perugia;I. P. R. Laboratory;Washington;DC 20375;U. I. -. I. D. A. E. P. Spaziali-U.-I.-.-I.-D.-A.-E.-P.-Spaziali-2039908978;V. Cavaliere;1. Rome;I. P. R. Laboratory;Ahmedabad;I. D. O. Astronomy;Nao;72 Tsarigradsko Shose Blvd.;1784 Sofia;B. D. O. Astronomy;University of Sofia;BG-1784 Sofia;Bulgaria Universita di Siena;I-53100;Siena;Italy Instituto de Astrofisica;O. Tonantzintla;Puebla;Mexico. Aalto University Metsahovi Radio Observatory-Mexico.-Aalto-University-Metsahovi-Radio-2039904048;Metsahovintie 114;FI-02540 Kylmala;Finland Aalto University Department of Electronics;Nanoengineering;P. O. B. 15500;FI-00076 Aalto;Finland Finnish Centre for Astronomy with Eso;5. Vesilinnantie;F. Turku;F. F. F. Research-F.-F.;Boston University;725 Commonwealth Avenue;Boston;M. Institute;S. University;28 UniversitetskijPr.;Petrodvorets;196140 St. Petersburg;Russia Pulkovo Observatory;St.-Petersburg;R. C. A. Observatory;Russia Nobeyama Radio Observatory;C. I. O. Technology.;Pasadena;CA 91125;Usa Institute of Astrophysics;F. F. Research-F.;Technology-Hellas;GR-70013 Heraklion;Greece.;U. Crete;GR-70013 Heraklion;G. D. D. Astronom'ia-G.-D.-D.-Astronom'ia-2039909251;U. Chile;Camino El Observatorio 1515;L. Condés;Santiago;Chile CePIA;D. D. Astronom'ia-D.;U. Concepci'on;Concepci'on;Chile.
中科院分区：
文献类型：
--
作者：
V. Acciari;S. Ansoldi;L. A. Antonelli;A. A. Engels-A.;M. Artero;K. Asano;D. Baack;A. Babi'c;A. Baquero;U. D. Almeida;J. Barrio;J. Gonz'alez;W. Bednarek;L. Bellizzi;E. Bernardini;M. Bernardos;A. Berti;J. Besenrieder;W. Bhattacharyya;C. Bigongiari;A. Biland;O. Blanch;G. Bonnoli;vZ. Bovsnjak;G. Busetto;R. Carosi;G. Ceribella;M. Cerruti;Y. Chai;A. Chilingarian;S. Cikota;S. M. Colak;E. Colombo;J. Contreras;J. Cortina;S. Covino;Giacomo D’Amico;V. D’Elia;P. D. Vela;F. Dazzi;A. Angelis;B. Lotto;M. Delfino;J. Delgado;C. Mendez;D. Depaoli;F. D. Pierro;L. Venere;E. Espineira;D. Prester;A. Donini;D. Dorner;M. Doro;D. Elsaesser;V. Ramazani;A. Fattorini;G. Ferrara;L. Foffano;M. Fonseca;L. Font;C. Fruck;S. Fukami;R. L'opez;M. Garczarczyk;S. Gasparyan;M. Gaug;N. Giglietto;F. Giordano;P. Gliwny;N. Godinovi'c;J. Green;D. Green;D. Hadasch;A. Hahn;L. Heckmann;J. Herrera;J. Hoang;D. Hrupec;M. Hutten;T. Inada;S. Inoue;K. Ishio;Y. Iwamura;J. Jormanainen;L. Jouvin;Y. Kajiwara;M. Karjalainen;D. Kerszberg;Y. Kobayashi;H. Kubo;J. Kushida;A. Lamastra;D. Lelas;F. Leone;E. Lindfors;S. Lombardi;F. Longo;R. L'opez-Coto;M. L'opez-Moya;A. L'opez-Oramas;S. Loporchio;B. Fraga;C. Maggio;P. Majumdar;M. Makariev;M. Mallamaci;G. Maneva;M. Manganaro;K. Mannheim;L. Maraschi;M. Mariotti;M. Mart'inez;D. Mazin;S. Mender;S. Mi'canovi'c;D. Miceli;T. Miener;M. Minev;J. Miranda;R. Mirzoyan;E. Molina;A. Moralejo;D. Morcuende;V. Moreno;E. Moretti;V. Neustroev;C. Nigro;K. Nilsson;D. Ninci;K. Nishijima;K. Noda;S. Nozaki;Y. Ohtani;T. Oka;J. Otero-Santos;S. Paiano;M. Palatiello;D. Paneque;R. Paoletti;J. Paredes;L. Pavleti'c;P. Peñil;C. Perennes;M. Persic;P. Moroni;E. Prandini;C. Priyadarshi;I. Puljak;W. Rhode;M. Rib'o;J. Rico;C. Righi;A. Rugliancich;L. Saha;N. Sahakyan;T. Saito;S. Sakurai;K. Satalecka;F. G. Saturni;B. Schleicher;K. Schmidt;T. Schweizer;J. Sitarek;I. vSnidari'c;D. Sobczynska;A. Spolon;A. Stamerra;D. Strom;M. Strzys;Y. Suda;T. Suri'c;M. Takahashi;F. Tavecchio;P. Temnikov;T. Terzi'c;M. Teshima;N. Torres-Albà;L. Tosti;S. Truzzi;A. Tutone;J. Scherpenberg;G. Vanzo;M. Acosta;S. Ventura;V. Verguilov;C. Vigorito;V. Vitale;I. Vovk;M. Will;D. Z. R. Angioni;F. D’Ammando;S. Ciprini;C. Cheung;M. Orienti;L. Pacciani;P. Prajapati;P. Kumar;S. Ganesh;A. Kurtenkov;A. Marchini;L. Carrasco;G. Escobedo;A. Porras;E. Recillas;A. Lahteenmaki;M. Tornikoski;M. Berton;J. Tammi;R. J. C. Vera;S. Jorstad;A. Marscher;Z. Weaver;M. Hart;M. K. Hallum V. M. Larionov-M.-K.-Hallum-V.-M.-Larionov;G. Borman;T. Grishina;E. Kopatskaya;E. Larionova;A. Nikiforova;D. Morozova;S. Savchenko;Y. Troitskaya;I. Troitsky;A. Vasilyev;M. Hodges;T. Hovatta;S. Kiehlmann;W. Max-Moerbeck;A. Readhead;R. Reeves;T. K. I. D. A. D. Canarias-T.-K.-I.-D.-A.-D.-Canarias-2039902423;La Laguna;U. L. Laguna;D. Astrof'isica;E-38200 La Laguna;Tenerife;Spain Universita di Udine;I. Trieste;I. Udine;I. I. I. O. Astrophysics-I.-I.;I. Rome;Italy Eth Zurich;CH-8093 Zurich;Switzerland Institut de F'isica d'Altes Energies;T. Science;Technology;E-08193 Bellaterra;S. I. F. N. Research;T. U. O. Tokyo;Kashiwa;277-8582 Chiba;Japan Technische Universitat Dortmund;D. Dortmund;Germany Croatian Magic Group University of Zagreb;Faculty of Electrical Engineering;Computing;10000 Zagreb;Croatia Iparcos Institute;Emftel Department;U. Madrid;E. Madrid;S. C. B. D. P. F'isicas;22290-180 Urca;R. Janeiro;Brazil University of Lodz;F. O. Physics;Applied Informatics;D. O. Astrophysics;9. Lodz;Poland Universita di Siena;I. Pisa;I-53100 Siena;Italy Deutsches Elektronen-Synchrotron;D. Zeuthen;Germany Universita di Padova;Infn;I-35131 Padova;I. Torino;U. Torino;10125 Torino;I. M. F. Physik;D-80805 Munchen;G. Pisa;I. Pisa;I. U. D. Barcelona;Iccub;IEEC-UB;E. Barcelona;S. A. M. G. A. A. N. S. Energ'eticas-S.-A.-M.-G.-A.-A.-N.-S.-Energ'eticas-2039907171;Medioambientales y Tecnol'ogicas;Spain Infn Magic Group Infn Sezione di Bari-Spain-Infn-Magic-Group-Infn-Sezione-di-Bari-2039908634;D. Bari;70125 Bari;Italy Croatian Magic Group University of Rijeka;D. Physics;51000 Rijeka;Croatia Universitat Wurzburg;D-97074 Wurzburg;Germany Eso;U. Turku;F. Turku;Finland Departament de F'isica;CERES-IEEC;U. Barcelona;Spain Armenian Magic Group ICRANet-Armenia at Nas RA Cro Split-Spain-Armenian-Magic-Group-ICRANet-Armenia-at-Nas-2039908753;M. Engineering;Naval Architecture;21000 Split;Croatia Croatian Magic Group Josip Juraj Strossmayer Unive Osijek-Croatia-Croatian-Magic-Group-Josip-Juraj-Unive-2039909256;31000 Osijek;C. H. G. D. O. Physics;Kyoto University;606-8502 Kyoto;J. D. O. Physics;T. University;Hiratsuka;259-1292 Kanagawa;J. D. O. Physics;Hbni;1. Bidhannagar;Salt Lake;Sector-1;Kolkata 700064;India UGC-DAE Consortium for Scientific Research;Nucl. Energy;Bulgarian academy of Sciences;BG-1784 Sofia;Bulgaria Finnish Magic Group Astronomy Research Unit-Bulgaria-Finnish-Magic-Group-Astronomy-Research-2039908829;U. Oulu;F. Oulu;Finland Croatian Magic Group Rudjer Bovskovi'c Institute-Finland-Croatian-Magic-Group-Rudjer-Bovskovi'c-2039910324;Croatia Infn Magic Group Infn Sezione di Perugia-Croatia-Infn-Magic-Group-Infn-Sezione-di-Perugia-2039909475;06123 Perugia;Italy Infn Magic Group Infn Roma Tor Vergata-Italy-Infn-Magic-Group-Infn-Roma-Tor-Vergata-2039910031;00133 Roma;Italy now at University of Innsbruck also at Port d'Info Fisica-Italy-now-at-University-of-Innsbruck-also-at-Port-2040067092;Universita di UdineI.N.F.N. Trieste;Inaf Trieste;Germany also at Inaf Trieste;D. Physics;Astronomy;University Research;Japan Asi Space Science Data Center;V. Politecnico;S. I. R. -. I. I. -. R. T. Vergata-S.-I.-R.-.-I.-I.-.-R.-T.-Vergata-2039908718;V. R. Scientifica;1. I. R. -. I. I. -. I. Bologna-1.-I.-R.-.-I.-I.-.-I.-Bologna-2039912221;V. G. 101;I-40129;Bologna;I. Nucleare;S. Perugia;I. Perugia;I. P. R. Laboratory;Washington;DC 20375;U. I. -. I. D. A. E. P. Spaziali-U.-I.-.-I.-D.-A.-E.-P.-Spaziali-2039908978;V. Cavaliere;1. Rome;I. P. R. Laboratory;Ahmedabad;I. D. O. Astronomy;Nao;72 Tsarigradsko Shose Blvd.;1784 Sofia;B. D. O. Astronomy;University of Sofia;BG-1784 Sofia;Bulgaria Universita di Siena;I-53100;Siena;Italy Instituto de Astrofisica;O. Tonantzintla;Puebla;Mexico. Aalto University Metsahovi Radio Observatory-Mexico.-Aalto-University-Metsahovi-Radio-2039904048;Metsahovintie 114;FI-02540 Kylmala;Finland Aalto University Department of Electronics;Nanoengineering;P. O. B. 15500;FI-00076 Aalto;Finland Finnish Centre for Astronomy with Eso;5. Vesilinnantie;F. Turku;F. F. F. Research-F.-F.;Boston University;725 Commonwealth Avenue;Boston;M. Institute;S. University;28 UniversitetskijPr.;Petrodvorets;196140 St. Petersburg;Russia Pulkovo Observatory;St.-Petersburg;R. C. A. Observatory;Russia Nobeyama Radio Observatory;C. I. O. Technology.;Pasadena;CA 91125;Usa Institute of Astrophysics;F. F. Research-F.;Technology-Hellas;GR-70013 Heraklion;Greece.;U. Crete;GR-70013 Heraklion;G. D. D. Astronom'ia-G.-D.-D.-Astronom'ia-2039909251;U. Chile;Camino El Observatorio 1515;L. Condés;Santiago;Chile CePIA;D. D. Astronom'ia-D.;U. Concepci'on;Concepci'on;Chile.
上下文类星体B1420+326是一颗耀变体，被归类为平谱射电类星体（FSRQ）。在2020年初，它被发现处于增强的通量状态，广泛的多波长活动使我们能够追踪耀斑的演变。目标。我们在此耀斑状态下寻找类星体B1420+326的甚高能（VHE）γ射线辐射。我们的目标是在耀斑的不同阶段的宽带发射源的特征和模型。方法.该辐射源是用无线电、近红外、光学（包括偏振测量和光谱学）、紫外、X射线和伽马射线波段的一些仪器观测到的。我们使用专用的光谱学结果来估计吸积盘和尘埃环光度。我们进行了光谱能量分布建模的框架下，结合同步-自康普顿和外部康普顿的情况下，电子能量分布的加速和冷却过程中的部分决定。结果在增强态期间，类星体B1420+326的两个SED分量的通量急剧增加，峰值向更高的能量移动。MAGIC望远镜的后续观测导致从这个来源探测到VHE伽马射线发射，使其成为在这个能量范围内已知的少数几个FSRQ之一。建模使我们能够约束的磁场和电子能量分布在发射区的演变。在低偏振态期间，伽马射线耀斑伴随着光学偏振矢量的旋转。此外，一个新的超光速射电结同时出现在喷流的射电图像中。的光学光谱示出了一个突出的FeII凸点与通量一起演变的连续发射和不同的等效宽度的MgII线。
Context. QSO B1420+326 is a blazar classified as a flat-spectrum radio quasar (FSRQ). At the beginning of the year 2020, it was found to be in an enhanced flux state and an extensive multiwavelength campaign allowed us to trace the evolution of the flare. Aims. We search for very high-energy (VHE) gamma-ray emission from QSO B1420+326 during this flaring state. We aim to characterize and model the broadband emission of the source over different phases of the flare. Methods. The source was observed with a number of instruments in radio, near-infrared, optical (including polarimetry and spectroscopy), ultraviolet, X-ray, and gamma-ray bands. We use dedicated optical spectroscopy results to estimate the accretion disk and the dust torus luminosity. We performed spectral energy distribution modeling in the framework of combined synchrotron-self-Compton and external Compton scenario in which the electron energy distribution is partially determined from acceleration and cooling processes. Results. During the enhanced state, the flux of both SED components of QSO B1420+326 drastically increased and the peaks were shifted to higher energies. Follow-up observations with the MAGIC telescopes led to the detection of VHE gamma-ray emission from this source, making it one of only a handful of FSRQs known in this energy range. Modeling allows us to constrain the evolution of the magnetic field and electron energy distribution in the emission region. The gamma-ray flare was accompanied by a rotation of the optical polarization vector during a low -polarization state. Also, a new superluminal radio knot contemporaneously appeared in the radio image of the jet. The optical spectroscopy shows a prominent FeII bump with flux evolving together with the continuum emission and a MgII line with varying equivalent width.