Related papers: Unveiling the X-ray/TeV engine in Mkn 421

Study of underlying particle spectrum during huge X-ray flare of Mkn 421 in April 2013

Context: In April 2013, the nearby (z=0.031) TeV blazar, Mkn 421, showed one of the largest flares in X-rays since the past decade. Aim: To study all multiwavelength data available during MJD 56392 to 56403, with special emphasis on X-ray…

Astrophysics of Galaxies · Physics 2015-08-12 Atreyee Sinha , Amit Shukla , Ranjeev Misra , Varsha R. Chitnis , A. R. Rao , B. S. Acharya

X-ray Emission of Mkn 421: New Clues From Its Spectral Evolution. II. Spectral Analysis and Physical Constraints

Mkn 421 was repeatedly observed with BeppoSAX in 1997-1998. The source showed a very rich phenomenology, with remarkable spectral variability. This is the second of two papers presenting the results of a thorough temporal and spectral…

Astrophysics · Physics 2009-10-31 G. Fossati , A. Celotti , M. Chiaberge , Y. H. Zhang , L. Chiappetti , G. Ghisellini , L. Maraschi , F. Tavecchio , E. Pian , A. Treves

Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017

We present a detailed characterisation and theoretical interpretation of the broadband emission of the paradigmatic TeV blazar Mrk 421, with special focus on the multi-band flux correlations. The dataset has been collected through an…

High Energy Astrophysical Phenomena · Physics 2021-12-01 MAGIC Collaboration , V. A. Acciari , S. Ansoldi , L. A. Antonelli , A. Arbet Engels , M. Artero , K. Asano , A. Babić , A. Baquero , U. Barres de Almeida , J. A. Barrio , I. Batković , J. Becerra González , W. Bednarek , L. Bellizzi , E. Bernardini , M. Bernardos , A. Berti , J. Besenrieder , W. Bhattacharyya , C. Bigongiari , O. Blanch , Ž. Bošnjak , G. Busetto , R. Carosi , G. Ceribella , M. Cerruti , Y. Chai , A. Chilingarian , S. Cikota , S. M. Colak , E. Colombo , J. L. Contreras , J. Cortina , S. Covino , G. D'Amico , V. D'Elia , P. Da Vela , F. Dazzi , A. De Angelis , B. De Lotto , M. Delfino , J. Delgado , C. Delgado Mendez , D. Depaoli , F. Di Pierro , L. Di Venere , E. Do Souto Espiñeira , D. Dominis Prester , A. Donini , M. Doro , V. Fallah Ramazani , A. Fattorini , G. Ferrara , M. V. Fonseca , L. Font , C. Fruck , S. Fukami , R. J. García López , M. Garczarczyk , S. Gasparyan , M. Gaug , N. Giglietto , F. Giordano , P. Gliwny , N. Godinović , J. G. Green , D. Green , D. Hadasch , A. Hahn , L. Heckmann , J. Herrera , J. Hoang , D. Hrupec , M. Hütten , T. Inada , S. Inoue , K. Ishio , Y. Iwamura , I. Jiménez , 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. López-Coto , M. López-Moya , A. López-Oramas , S. Loporchio , B. Machado de Oliveira Fraga , C. Maggio , P. Majumdar , M. Makariev , M. Mallamaci , G. Maneva , M. Manganaro , L. Maraschi , M. Mariotti , M. Martínez , D. Mazin , S. Menchiari , S. Mender , S. Mićanović , D. Miceli , T. Miener , M. Minev , J. M. Miranda , R. Mirzoyan , E. Molina , A. Moralejo , D. Morcuende , V. Moreno , E. Moretti , V. Neustroev , C. Nigro , K. Nilsson , K. Nishijima , K. Noda , S. Nozaki , Y. Ohtani , T. Oka , J. Otero-Santos , S. Paiano , M. Palatiello , D. Paneque , R. Paoletti , J. M. Paredes , L. Pavletić , P. Peñil , C. Perennes , M. Persic , P. G. Prada Moroni , E. Prandini , C. Priyadarshi , I. Puljak , M. Ribó , J. Rico , C. Righi , A. Rugliancich , L. Saha , N. Sahakyan , T. Saito , S. Sakurai , K. Satalecka , F. G. Saturni , K. Schmidt , T. Schweizer , J. Sitarek , I. Šnidarić , D. Sobczynska , A. Spolon , A. Stamerra , D. Strom , M. Strzys , Y. Suda , T. Surić , M. Takahashi , F. Tavecchio , P. Temnikov , T. Terzić , M. Teshima , L. Tosti , S. Truzzi , A. Tutone , S. Ubach , J. van Scherpenberg , G. Vanzo , M. Vazquez Acosta , S. Ventura , V. Verguilov , C. F. Vigorito , V. Vitale , I. Vovk , M. Will , C. Wunderlich , D. Zarić , FACT Collaboration , : , D. Baack , M. Balbo , N. Biederbeck , A. Biland , T. Bretz , J. Buss , D. Dorner , L. Eisenberger , D. Elsaesser , D. Hildebrand , R. Iotov , K. Mannheim , D. Neise , M. Noethe , A. Paravac , W. Rhode , B. Schleicher , V. Sliusar , R. Walter , Other groups , collaborations , : , F. D'Ammando , D. Horan , A. Y. Lien , M. Baloković , G. M. Madejski , M. Perri , F. Verrecchia , C. Leto , A. Lähteenmäki , M. Tornikoski , V. Ramakrishnan , E. Järvelä , R. J. C. Vera , M. Villata , C. M. Raiteri , A. C. Gupta , A. Pandey , A. Fuentes , I. Agudo , C. Casadio , E. Semkov , S. Ibryamov , A. Marchini , R. Bachev , A. Strigachev , E. Ovcharov , V. Bozhilov , A. Valcheva , E. Zaharieva , G. Damljanovic , O. Vince , V. M. Larionov , G. A. Borman , T. S. Grishina , V. A. Hagen-Thorn , E. N. Kopatskaya , E. G. Larionova , L. V. Larionova , D. A. Morozova , A. A. Nikiforova , S. S. Savchenko , I. S. Troitskiy , Y. V. Troitskaya , A. A. Vasilyev , O. A. Merkulova , W. P. Chen , M. Samal , H. C. Lin , J. W. Moody , A. C. Sadun , S. G. Jorstad , A. P. Marscher , Z. R. Weaver , M. Feige , J. Kania , M. Kopp , L. Kunkel , D. Reinhart , A. Scherbantin , L. Schneider , C. Lorey , J. A. Acosta-Pulido , M. I. Carnerero , D. Carosati , S. O. Kurtanidze , O. M. Kurtanidze , M. G. Nikolashvili , R. G. Chanishvili , R. A. Chigladze , R. Z. Ivanidze , G. N. Kimeridze , L. A. Sigua , M. D. Joner , M. Spencer , M. Giroletti , N. Marchili , S. Righini , N. Rizzi , G. Bonnoli

X-ray Emission of Mkn 421: New Clues From Its Spectral Evolution. I. Temporal Analysis

Mkn 421 was repeatedly observed with BeppoSAX in 1997-1998. This is the first of two papers where we present the results of a thorough temporal and spectral analysis of all the data available to us, focusing in particular on the flare of…

Astrophysics · Physics 2009-10-31 G. Fossati , A. Celotti , M. Chiaberge , Y. H. Zhang , L. Chiappetti , G. Ghisellini , L. Maraschi , F. Tavecchio , E. Pian , A. Treves

Variations of the TeV energy spectrum at different flux levels of Mkn 421 observed with the HEGRA system of Cherenkov telescopes

The nearby BL Lacertae (BL Lac) object Markarian~421 (Mkn~421) at a red shift z=0.031 was observed to undergo strong TeV Gamma-ray outbursts in the observational periods from December 1999 until May 2001. The time averaged energy spectrum…

Astrophysics · Physics 2008-11-26 HEGRA Collaboration , F. Aharonian

The quiescent state broadband X-ray spectrum and variability of Mkn421

The BL Lac object Mkn~421 was observed three times by the X-ray observatory BeppoSAX in consecutive days during 1997 April and May. The source was in a quiescent state, with an average 2-10 keV flux of 9.0 x 10^(-11) erg/cm/cm/s. Flux…

Astrophysics · Physics 2007-05-23 M. Guainazzi , G. Vacanti , A. Malizia , K. S. O'Flaherty , E. Palazzi , A. N. Parmar

Rapid X-ray Variability in Mkn 421 during a Multiwavelength Campaign

The study of short-term variability properties in AGN jets has the potential to shed light on their particle acceleration and emission mechanisms. We report results from a four-day coordinated multi-wavelength campaign on the highly-peaked…

High Energy Astrophysical Phenomena · Physics 2022-06-09 Alex G. Markowitz , Krzysztof Nalewajko , Gopal Bhatta , Gulab C. Dewangan , Sunil Chandra , Daniela Dorner , Bernd Schleicher , Urszula Pajdosz-Smierciak , Lukasz Stawarz , Staszek Zola , Michal Ostrowski , Daniele Carosati , Saikruba Krishnan , Rumen Bachev , Erika Benitez , Kosmas Gazeas , David Hiriart , Shao-Ming Hu , Valeri Larionov , Alessandro Marchini , Katsura Matsumoto , A. A. Nikiforova , Tapio Pursimo , Claudia M. Raiteri , Daniel E. Reichart , Diego Rodriguez , Evgeni Semkov , Anton Strigachev , Yuki Sugiura , Massimo Villata , James R. Webb , Axel Arbet-Engels , Dominik Baack , Matteo Balbo , Adrian Biland , Thomas Bretz , Jens Buss , Laura Eisenberger , Dominik Elsaesser , Dorothee Hildebrand , Roman Iotov , Adelina Kalenski , Karl Mannheim , Alison Mitchell , Dominik Neise , Maximilian Noethe , Aleksander Paravac , Wolfgang Rhode , Vitalii Sliusar , Roland Walter

X-ray intraday variability of the TeV blazar Mrk 421 with {\it XMM-Newton}

Highly variable Markarian 421 is a bright high synchrotron energy peaked blazar showing wide featureless non-thermal spectrum making it a good candidate for our study of intraday flux and spectral variations over time. We analyse its X-ray…

High Energy Astrophysical Phenomena · Physics 2024-11-07 A Priyana Noel , Haritma Gaur , Alok C. Gupta , Alicja Wierzcholska , Michal Ostrowski , Vinit Dhiman , Gopal Bhatta

Variability in the synchrotron self-Compton model of blazar emission

We present a model of the spectra of gamma-ray emitting blazars in which a single homogeneous emission region both emits synchrotron photons directly and scatters them to high (gamma-ray) energy before emission (a ``synchrotron…

Astrophysics · Physics 2016-08-30 A. Mastichiadis , J. G. Kirk

Multi-wavelength Observations of VHE BL Lac Objects

We present multi-wavelength observations of the very high energy (VHE, E >250 GeV) gamma-ray sources Mrk 421 and Mrk 501. The VHE data presented here were taken with the Whipple Observatory 10m gamma-ray telescope. In the Mrk 421 campaign,…

Astrophysics · Physics 2019-08-14 M. Catanese

Discovery of Spectral Variability of Markarian 421 at TeV Energies

The detection of spectral variability of the gamma-ray blazar Mrk 421 at TeV energies is reported. Observations with the Whipple Observatory 10m gamma-ray telescope taken in 2000/2001 revealed exceptionally strong and long-lasting flaring…

Astrophysics · Physics 2009-11-07 F. Krennrich , I. H. Bond , S. M. Bradbury , J. H. Buckley , D. A. Carter-Lewis , W. Cui , I. de la Calle Perez , D. J. Fegan , S. J. Fegan , J. P. Finley , J. A. Gaidos , K. Gibbs , G. H. Gillanders , T. A. Hall , A. M. Hillas , J. Holder , D. Horan , M. Jordan , M. Kertzman , D. Kieda , J. Kildea , J. Knapp , K. Kosack , M. J. Lang , S. LeBohec , P. Moriarty , D. Müller , R. A. Ong , R. Pallassini , D. Petry , J. Quinn , N. W. Reay , P. T. Reynolds , H. J. Rose , G. H. Sembroski , R. Sidwell , N. Stanton , S. P. Swordy , V. V. Vassiliev , S. P. Wakely , T. C. Weekes

Testing the homogeneous synchrotron self Compton model for gamma ray production in Mrk 421

Based on the detected variability time scales of X-ray and TeV gamma-ray emission, and the observed multiwavelength photon spectrum, of Mrk 421 we place constraints on the allowed parameter space (magnetic field and Doppler factor of the…

Astrophysics · Physics 2015-06-24 W. Bednarek , R. J. Protheroe

First Results from NuSTAR Observations of Mkn 421

Mkn 421 is a nearby active galactic nucleus dominated at all wavelengths by a very broad non-thermal continuum thought to arise from a relativistic jet seen at a small angle to the line of sight. Its spectral energy distribution peaks in…

High Energy Astrophysical Phenomena · Physics 2015-06-17 M. Baloković , M. Ajello , R. D. Blandford , S. E. Boggs , F. Borracci , J. Chiang , F. E. Christensen , W. W. Craig , K. Forster , A. Furniss , F. Fuerst , G. Ghisellini , B. Giebels , P. Giommi , B. W. Grefenstette , C. J. Hailey , F. A. Harrison , M. Hayashida , B. Humensky , Y. Inoue , J. E. Koglin , H. Krawczynski , G. M. Madejski , K. K. Madsen , D. L. Meier , T. Nelson , P. Ogle , D. Paneque , M. Perri , S. Puccetti , C. S. Reynolds , T. Sbarrato , D. Stern , G. Tagliaferri , C. M. Urry , A. E. Wehrle , W. W. Zhang

Mkn 421 was observed for about two days with BeppoSAX, prior to and partly overlapping the start of a 1 week continuous exposure with ASCA in April 1998, as part of a world-wide multiwavelength campaign. A pronounced, well defined, flare…

Astrophysics · Physics 2009-10-31 L. Maraschi , G. Fossati , F. Tavecchio , L. Chiappetti , A. Celotti , G. Ghisellini , P. Grandi , E. Pian , G. Tagliaferri , A. Treves , A. C. Breslin , J. H. Buckley , D. A. Carter-Lewis , M. Catanese , M. F. Cawley , D. J. Fegan , S. Fegan , J. Finley , J. Gaidos , T. Hall , A. M. Hillas , F. Krennrich , R. W. Lessard , C. Masterson , P. Moriarty , J. Quinn , J. Rose , F. Samuelson , T. C. Weekes , T. C. Weekes

Spectral Monitoring of Mrk 421 during 2004

Daily monitoring of Mrk 421 in the X-ray and TeV bands during the first half of 2004 showed rapid flaring events above an elevated base flux level, culminating from March to May 2004 at an average flux level matching the highest detected…

Astrophysics · Physics 2019-08-14 J. Grube

Long-term multi-wavelength variability and correlation study of Markarian 421 from 2007 to 2009

We study the multi-band variability and correlations of the TeV blazar Mrk 421 on year time scales, which can bring additional insight on the processes responsible for its broadband emission. We observed Mrk 421 in the very high energy…

Astrophysics of Galaxies · Physics 2019-08-15 MAGIC Collaboration , M. L. Ahnen , S. Ansoldi , L. A. Antonelli , P. Antoranz , A. Babic , B. Banerjee , P. Bangale , U. Barres de Almeida , J. A. Barrio , J. Becerra González , W. Bednarek , E. Bernardini , B. Biasuzzi , A. Biland , O. Blanch , S. Bonnefoy , G. Bonnoli , F. Borracci , T. Bretz , S. Buson , A. Carosi , A. Chatterjee , R. Clavero , P. Colin , E. Colombo , J. L. Contreras , J. Cortina , S. Covino , P. Da Vela , F. Dazzi , A. De Angelis , B. De Lotto , E. de Oña Wilhelmi , F. Di Pierro , A. Domínguez , D. Dominis Prester , D. Dorner , M. Doro , S. Einecke , D. Eisenacher Glawion , D. Elsaesser , A. Fernández-Barral , D. Fidalgo , M. V. Fonseca , L. Font , K. Frantzen , C. Fruck , D. Galindo , R. J. García López , M. Garczarczyk , D. Garrido Terrats , M. Gaug , P. Giammaria , N. Godinović , A. González Muñoz , D. Gora , D. Guberman , D. Hadasch , A. Hahn , Y. Hanabata , M. Hayashida , J. Herrera , J. Hose , D. Hrupec , G. Hughes , W. Idec , K. Kodani , Y. Konno , H. Kubo , J. Kushida , A. La Barbera , D. Lelas , E. Lindfors , S. Lombardi , F. Longo , M. López , R. López-Coto , P. Majumdar , M. Makariev , K. Mallot , G. Maneva , M. Manganaro , K. Mannheim , L. Maraschi , B. Marcote , M. Mariotti , M. Martínez , D. Mazin , U. Menzel , J. M. Miranda , R. Mirzoyan , A. Moralejo , E. Moretti , D. Nakajima , V. Neustroev , A. Niedzwiecki , M. Nievas Rosillo , K. Nilsson , K. Nishijima , K. Noda , L. Nogués , R. Orito , A. Overkemping , S. Paiano , J. Palacio , M. Palatiello , D. Paneque , R. Paoletti , J. M. Paredes , X. Paredes-Fortuny , G. Pedaletti , L. Perri , M. Persic , J. Poutanen , P. G. Prada Moroni , E. Prandini , I. Puljak , W. Rhode , M. Ribó , J. Rico , J. Rodriguez Garcia , T. Saito , K. Satalecka , C. Schultz , T. Schweizer , S. N. Shore , A. Sillanpää , J. Sitarek , I. Snidaric , D. Sobczynska , A. Stamerra , T. Steinbring , M. Strzys , L. Takalo , H. Takami , F. Tavecchio , P. Temnikov , T. Terzić , D. Tescaro , M. Teshima , J. Thaele , D. F. Torres , T. Toyama , A. Treves , V. Verguilov , I. Vovk , J. E. Ward , M. Will , M. H. Wu , R. Zanin , D. A. Blinov , W. P. Chen , N. V. Efimova , E. Forné , T. S. Grishina , T. Hovatta , B. Jordan , G. N. Kimeridze , E. N. Kopatskaya , E. Koptelova , O. M. Kurtanidze , S. O. Kurtanidze , A. Lähteenmaäki , V. M. Larionov , E. G. Larionova , L. V. Larionova , R. Ligustri , H. C. Lin , B. McBreen , D. A. Morozova , M. G. Nikolashvili , C. M. Raiteri , J. A. Ros , A. C. Sadun , L. A. Sigua , M. Tornikoski , I. S. Troitsky , M. Villata

A time dependent approach to model X-ray and $\gamma$--ray light curves of Mrk 421 observed during the flare in February 2010

Strong X-ray and $\gamma$--ray flares have been detected in February 2010 from the high synchrotron peaked blazar Mrk 421 (z=0.031). With the motivation of understanding the physics involved in this flaring activity, we study the…

High Energy Astrophysical Phenomena · Physics 2017-01-11 K K Singh , S Sahayanathan , A Sinha , N Bhatt , A K Tickoo , K K Yadav , R C Rannot , P Chandra , K Venugopal , P Marandi , N Kumar , H C Goyal , A Goyal , N K Agarwal , M Kothari , K Chanchalani , V K Dhar , N Chouhan , C K Bhat , M K Koul , R Koul

A search for spectral hysteresis and energy-dependent time lags from X-ray and TeV gamma-ray observations of Mrk 421

Blazars are variable emitters across all wavelengths over a wide range of timescales, from months down to minutes. It is therefore essential to observe blazars simultaneously at different wavelengths, especially in the X-ray and gamma-ray…

High Energy Astrophysical Phenomena · Physics 2016-12-28 A. U. Abeysekara , S. Archambault , A. Archer , W. Benbow , R. Bird , M. Buchovecky , J. H. Buckley , V. Bugaev , J. V Cardenzana , M. Cerruti , X. Chen , L. Ciupik , M. P. Connolly , W. Cui , J. D. Eisch , A. Falcone , Q. Feng , J. P. Finley , H. Fleischhack , A. Flinders , L. Fortson , A. Furniss , S. Griffin , M. Hütten , N. Håkansson , D. Hanna , O. Hervet , J. Holder , T. B. Humensky , P. Kaaret , P. Kar , M. Kertzman , D. Kieda , M. Krause , S. Kumar , M. J. Lang , G. Maier , S. McArthur , A. McCann , K. Meagher , P. Moriarty , R. Mukherjee , D. Nieto , S. O'Brien , R. A. Ong , A. N. Otte , N. Park , V. Pelassa , M. Pohl , A. Popkow , E. Pueschel , K. Ragan , P. T. Reynolds , G. T. Richards , E. Roache , I. Sadeh , M. Santander , G. H. Sembroski , K. Shahinyan , D. Staszak , I. Telezhinsky , J. V. Tucci , J. Tyler , S. P. Wakely , A. Weinstein , A. Wilhelm , D. A. Williams , M. L. Ahnen , S. Ansoldi , L. A. Antonelli , P. Antoranz , C. Arcaro , A. Babic , B. Banerjee , P. Bangale , U. Barres de Almeida , J. A. Barrio , J. Becerra González , W. Bednarek , E. Bernardini , A. Berti , B. Biasuzzi , A. Biland , O. Blanch , S. Bonnefoy , G. Bonnoli , F. Borracci , T. Bretz , R. Carosi , A. Carosi , A. Chatterjee , P. Colin , E. Colombo , J. L. Contreras , J. Cortina , S. Covino , P. Cumani , P. Da Vela , F. Dazzi , A. De Angelis , B. De Lotto , E. de Oña Wilhelmi , F. Di Pierro , M. Doert , A. Domínguez , D. Dominis Prester , D. Dorner , M. Doro , S. Einecke , D. Eisenacher Glawion , D. Elsaesser , M. Engelkemeier , V. Fallah Ramazani , A. Fernández-Barral , D. Fidalgo , M. V. Fonseca , L. Font , C. Fruck , D. Galindo , R. J. García López , M. Garczarczyk , M. Gaug , P. Giammaria , N. Godinović , D. Gora , D. Guberman , D. Hadasch , A. Hahn , T. Hassan , M. Hayashida , J. Herrera , J. Hose , D. Hrupec , G. Hughes , W. Idec , K. Kodani , Y. Konno , H. Kubo , J. Kushida , D. Lelas , E. Lindfors , S. Lombardi , F. Longo , M. López , R. López-Coto , P. Majumdar , M. Makariev , K. Mallot , G. Maneva , M. Manganaro , K. Mannheim , L. Maraschi , B. Marcote , M. Mariotti , M. Martínez , D. Mazin , U. Menzel , R. Mirzoyan , A. Moralejo , E. Moretti , D. Nakajima , V. Neustroev , A. Niedzwiecki , M. Nievas Rosillo , K. Nilsson , K. Nishijima , K. Noda , L. Nogués , M. Nöthe , S. Paiano , J. Palacio , M. Palatiello , D. Paneque , R. Paoletti , J. M. Paredes , X. Paredes-Fortuny , G. Pedaletti , M. Peresano , L. Perri , M. Persic , J. Poutanen , P. G. Prada Moroni , E. Prandini , I. Puljak , J. R. Garcia , I. Reichardt , W. Rhode , M. Ribó , J. Rico , T. Saito , K. Satalecka , S. Schroeder , T. Schweizer , S. N. Shore , A. Sillanpää , J. Sitarek , I. Snidaric , D. Sobczynska , A. Stamerra , M. Strzys , T. Surić , L. Takalo , F. Tavecchio , P. Temnikov , T. Terzić , D. Tescaro , M. Teshima , D. F. Torres , N. Torres-Albà , T. Toyama , A. Treves , G. Vanzo , M. Vazquez Acosta , I. Vovk , J. E. Ward , M. Will , M. H. Wu , R. Zanin , T. Hovatta , I. de la Calle Perez , P. S. Smith , E. Racero , M. Baloković

Multifrequency Variability and Correlations from Extensive Observing Campaigns of Mkn 421 and Mkn 501 in 2009

We are performing an unprecedentedly long and dense monitoring of the multi-frequency (radio to TeV) emission from the classical TeV blazars Mkn 421 and Mkn 501. These objects are among the brightest X-ray/TeV blazars in the sky and among…

High Energy Astrophysical Phenomena · Physics 2019-08-15 Ulisses Barres de Almeida , David Paneque , Nina Nowak , Nikola Strah , Diego Tescaro

Simultaneous Multiwavelength observation of Mkn 501 in a low state in 2006

We present results of the multiwavelength campaign on the TeV blazar Mkn 501 performed in 2006 July, including MAGIC for the VHE gamma-ray band and Suzaku for the X-ray band. A VHE gamma-ray signal was clearly detected with an average flux…

High Energy Astrophysical Phenomena · Physics 2009-12-04 The MAGIC Collaboration , H. Anderhub , R. Sato , M. Ushio , J. Kataoka , G. Madejski , T. Takahashi