G
G. H. Sembroski
Researcher at Purdue University
Publications - 167
Citations - 9515
G. H. Sembroski is an academic researcher from Purdue University. The author has contributed to research in topics: Blazar & Crab Nebula. The author has an hindex of 54, co-authored 160 publications receiving 8886 citations. Previous affiliations of G. H. Sembroski include University of Łódź & Max Planck Society.
Papers
More filters
Journal ArticleDOI
Detection of TeV photons from the active galaxy Markarian 421
M. Punch,M. Punch,C. W. Akerlof,M. F. Cawley,M. Chantell,D. J. Fegan,S. Fennell,S. Fennell,J. A. Gaidos,J. Hagan,A. M. Hillas,Yan-Fei Jiang,A. D. Kerrick,R. C. Lamb,M. A. Lawrence,D. A. Lewis,D. I. Meyer,G. Mohanty,K. S. O'Flaherty,P. T. Reynolds,A. C. Rovero,Michael Schubnell,G. H. Sembroski,T. C. Weekes,T. Whitaker,Christine D. Wilson +25 more
TL;DR: In this article, the detection of TeV energy photons from the giant elliptical galaxy Markarian 421 using the Whipple Observatory gamma-ray telescope was reported and the signal has a statistical significance of 6 sigma above background and the flux above 0.5 TeV is 0.3 of that from the Crab Nebula.
Journal ArticleDOI
The first VERITAS telescope
Jamie Holder,R. W. Atkins,H. M. Badran,G. Blaylock,S. M. Bradbury,J. H. Buckley,Karen Byrum,D. A. Carter-Lewis,O. Celik,Y. C. K. Chow,P. Cogan,Wei Cui,M. K. Daniel,I. de la Calle Perez,C. Dowdall,Paul Dowkontt,C. Duke,Abraham D. Falcone,S. J. Fegan,J. P. Finley,P. Fortin,Lucy Fortson,K. G. Gibbs,G. H. Gillanders,O. J. Glidewell,J. Grube,K. J. Gutierrez,Geza Gyuk,J. Hall,D. S. Hanna,E. Hays,E. Hays,D. Horan,S. B. Hughes,Thomas Brian Humensky,A. Imran,I. Jung,Philip Kaaret,G. E. Kenny,David Kieda,John Kildea,J. Knapp,Henric Krawczynski,F. Krennrich,M. J. Lang,S. LeBohec,E. Linton,E.K. Little,Gernot Maier,H. Manseri,A. Milovanovic,P. Moriarty,Reshmi Mukherjee,P. A. Ogden,R. A. Ong,D. Petry,J. S. Perkins,F. Pizlo,Martin Pohl,John L. Quinn,K. Ragan,P. T. Reynolds,E. Roache,H. J. Rose,M. Schroedter,G. H. Sembroski,G. Sleege,D. Steele,S. P. Swordy,A. Syson,John Toner,L. Valcarcel,V. V. Vassiliev,S. P. Wakely,T. C. Weekes,R. J. White,David A. Williams,R. G. Wagner +77 more
TL;DR: The first atmospheric Cherenkov telescope of VERITAS (the Very Energetic Radiation Imaging Telescope Array System) has been in operation since February 2005 and has been used for the first time in this article.
Journal ArticleDOI
Radio Imaging of the Very-High-Energy gamma-Ray Emission Region in the Central Engine of a Radio Galaxy
V. A. Acciari,E. Aliu,T. C. Arlen,Manuel A. Bautista,M. Beilicke,Wystan Benbow,S. M. Bradbury,J. H. Buckley,V. Bugaev,Yousaf M. Butt,Karen Byrum,A. Cannon,O. Celik,A. Cesarini,Y. C. Chow,L. Ciupik,P. Cogan,Wei Cui,R. Dickherber,S. J. Fegan,J. P. Finley,P. Fortin,Lucy Fortson,Amy Furniss,Daniel Gall,G. H. Gillanders,J. Grube,R. Guenette,Geza Gyuk,D. S. Hanna,Jamie Holder,D. Horan,C. M. Hui,Thomas Brian Humensky,A. Imran,P. Kaaret,N. Karlsson,David Kieda,John Kildea,A. Konopelko,Henric Krawczynski,Frank Krennrich,M. J. Lang,S. LeBohec,Gernot Maier,A. McCann,M. McCutcheon,J. Millis,P. Moriarty,R. A. Ong,A. N. Otte,D. Pandel,J. S. Perkins,D. Petry,Martin Pohl,John L. Quinn,K. Ragan,Luis C. Reyes,P. T. Reynolds,E. Roache,H. J. Rose,M. Schroedter,G. H. Sembroski,A. W. Smith,S. P. Swordy,M. Theiling,John Toner,A. Varlotta,S. Vincent,S. P. Wakely,J. E. Ward,T. C. Weekes,Amanda Weinstein,D. A. Williams,Stephanie Wissel,Matthew Wood,R. C. Walker,F. Davies,P. E. Hardee,W. Junor,C. Ly,Felix Aharonian,A. G. Akhperjanian,Gisela Anton,Almeida U. Barres De,A. R. Bazer-Bachi,Yvonne Becherini,B. Behera,K. Bernloehr,A. Bochow,C. Boisson,J. Bolmont,V. Borrel,J. Brucker,F. Brun,Pierre Brun,R. Buehler,T. Bulik,I. Buesching,Timothé Boutelier,P. M. Chadwick,A. Charbonnier,R. C. G. Chaves,A. Cheesebrough,L.-M. Chounet,A. C. Clapson,G. Coignet,M. Dalton,M. K. Daniel,I.D. Davids,B. Degrange,Christoph Deil,Hugh Dickinson,A. Djannati-Ataï,W. Domainko,L. O'c. Drury,Franky Dubois,Guillaume Dubus,J. Dyks,Michal Dyrda,K. Egberts,Dimitrios Emmanoulopoulos,P. Espigat,Christian Farnier,F. Feinstein,A. Fiasson,A. Foerster,G. Fontaine,M. Fuessling,Stefano Gabici,Y. A. Gallant,L. Gérard,D. Gerbig,B. Giebels,J. F. Glicenstein,B. Glueck,P. Goret,D. Goehring,D. Hauser,M. Hauser,S. Heinz,G. Heinzelmann,Gilles Henri,G. Hermann,Jim Hinton,A. Hoffmann,Werner Hofmann,M. Holleran,S. Hoppe,Dieter Horns,A. Jacholkowska,Jager O. C. de,C. Jahn,I. Jung,K. Katarzyński,U. F. Katz,Sarah Kaufmann,Eckhard Kendziorra,M. Kerschhaggl,D. Khangulyan,B. Khélifi,D. Keogh,W. Kluzniak,T. Kneiske,Nu. Komin,K. Kosack,G. Lamanna,J.-P. Lenain,Thomas Lohse,V. Marandon,J. M. Martin,Olivier Martineau-Huynh,Alexandre Marcowith,David Maurin,T. J. L. McComb,M. C. Medina,Rafał Moderski,Emmanuel Moulin,M. Naumann-Godo,Naurois M. De,D. Nedbal,D. Nekrassov,B. Nicholas,Jacek Niemiec,S. J. Nolan,Stefan Ohm,J-F. Olive,E. de Oña Wilhelmi,K. J. Orford,Michał Ostrowski,M. Panter,M. Paz Arribas,G. Pedaletti,G. Pelletier,P.-O. Petrucci,S. Pita,Michael Punch,M. Raue,S. M. Rayner,M. Renaud,Frank M. Rieger,J. Ripken,L. Rob,S. Rosier-Lees,Gavin Rowell,B. Rudak,Cameron B Rulten,J. Ruppel,V. Sahakian,Andrea Santangelo,Reinhard Schlickeiser,F. M. Schoeck,R. Schroeder,Ullrich Schwanke,S. Schwarzburg,S. Schwemmer,A. Shalchi,M. Sikora,J. L. Skilton,Helene Sol,D. Spangler,Lukasz Stawarz,R. Steenkamp,C. Stegmann,F. Stinzing,G. Superina,Anna Szostek,P. H. Tam,J.-P. Tavernet,Regis Terrier,O. Tibolla,O. Tibolla,M. Tluczykont,Eldik C. Van,G. Vasileiadis,Christo Venter,L. Venter,J. P. Vialle,Pascal Vincent,M. Vivier,H. J. Voelk,F. Volpe,Stefan Wagner,Martin Ward,Andrzej A. Zdziarski,A. Zech,H. Anderhub,L. A. Antonelli,P. Antoranz,Michael Backes,C. Baixeras,S. Balestra,Juan Abel Barrio,Denis Bastieri,J. Becerra Gonzlez,J. K. Becker,W. Bednarek,K. Berger,Elisa Bernardini,Adrian Biland,Ralph Bock,Giacomo Bonnoli,Pol Bordas,D. Borla Tridon,Valentí Bosch-Ramon,D. Bose,Ilana M. Braun,Thomas Bretz,I. Britvitch,M. Camara,E. Carmona,S. Commichau,Jose Luis Contreras,Juan Cortina,M. T. Costado,Stefano Covino,V. Curtef,Francesco Dazzi,Angelis A. De,Pozo E. de Cea Del,C. Delgado Mendez,Los Reyes R. De,Lotto B. De,Maria M. De,Sabata F. De,Aaron Dominguez,Daniela Dorner,Michele Doro,D. Elsaesser,Manel Errando,Daniel Ferenc,E. Fernndez,R. Firpo,M. V. Fonseca,Ll. Font,Nicola Galante,R. J. García López,M. Garczarczyk,M. Gaug,Florian Goebel,D. Hadasch,Masaaki Hayashida,A. Herrero,Dorothee Hildebrand,D. Hoehne-Moench,J. Hose,Chieh Hsu,T. Jogler,Daniel Kranich,Barbera A. La,A. Laille,E. Leonardo,Elina Lindfors,Saverio Lombardi,Francesco Longo,Morgan Lopez,E. Lorenz,Pratik Majumdar,G. Maneva,Nijil Mankuzhiyil,Karl Mannheim,L. Maraschi,Mosè Mariotti,M. I. Martínez,Daniel Mazin,Mario Meucci,Jose Miguel Miranda,R. Mirzoyan,H. Miyamoto,Javier Moldon,Mariano Moles,Abelardo Moralejo,Daniel Nieto,Kari Nilsson,Jelena Ninkovic,Igor Oya,Riccardo Paoletti,J. M. Paredes,M. Pasanen,D. Pascoli,Felicitas Pauss,R. G. Pegna,Miguel A. Pérez-Torres,Massimo Persic,L. Peruzzo,Francisco Prada,E. Prandini,N. Puchades,Ignasi Reichardt,Wolfgang Rhode,Marc Ribó,J. Rico,M. Rissi,A. Robert,S. Ruegamer,A. Saggion,T. Y. Saito,M. Salvati,Miguel A. Sánchez-Conde,Konstancja Satalecka,V. Scalzotto,V. Scapin,T. Schweizer,M. Shayduk,S. N. Shore,N. Sidro,Diego F. Torres,A. Sierpowska-Bartosik,A. Sillanpää,Julian Sitarek,Dorota Sobczyńska,Felix Spanier,Antonio Stamerra,L. S. Stark,L. O. Takalo,Fabrizio Tavecchio,Petar Temnikov,D. Tescaro,Masahiro Teshima,Nicola Turini,H. Vankov,Robert Wagner,Victor Zabalza,Fabio Zandanel,Roberta Zanin,J. Zapatero +385 more
TL;DR: Radio and VHE observations of the radio galaxy Messier 87 are revealed, revealing a period of extremely strong VHE gamma-ray flares accompanied by a strong increase of theRadio flux from its nucleus, implying that charged particles are accelerated to very high energies in the immediate vicinity of the black hole.
Journal ArticleDOI
Insights into the high-energy γ-ray emission of Markarian 501 from extensive multifrequency observations in the Fermi era
A. A. Abdo,A. A. Abdo,Markus Ackermann,Marco Ajello,Alice Allafort,Luca Baldini,Jean Ballet,Guido Barbiellini,Matthew G. Baring,Denis Bastieri,Keith Bechtol,R. Bellazzini,B. Berenji,Roger Blandford,Elliott D. Bloom,Emanuele Bonamente,A. W. Borgland,A. Bouvier,T. J. Brandt,J. Bregeon,A. Brez,M. Brigida,Pascal Bruel,R. Buehler,S. Buson,G. A. Caliandro,R. A. Cameron,A. Cannon,A. Cannon,P. Caraveo,S. Carrigan,J. M. Casandjian,E. Cavazzuti,Claudia Cecchi,Omer Celik,Omer Celik,E. Charles,A. Chekhtman,A. Chekhtman,C. C. Cheung,C. C. Cheung,James Chiang,Stefano Ciprini,R. Claus,Johann Cohen-Tanugi,Jan Conrad,S. Cutini,Charles D. Dermer,F. de Palma,E. Do Couto E Silva,Persis S. Drell,Richard Dubois,D. Dumora,C. Favuzzi,S. J. Fegan,Elizabeth C. Ferrara,W. B. Focke,P. Fortin,Marco Frailis,Lars Fuhrmann,Yasushi Fukazawa,Stefan Funk,P. Fusco,F. Gargano,D. Gasparrini,N. Gehrels,S. Germani,Nicola Giglietto,F. Giordano,Marcello Giroletti,T. Glanzman,G.L. Godfrey,I. A. Grenier,L. Guillemot,Sylvain Guiriec,M. Hayashida,E. Hays,D. Horan,R. E. Hughes,Gudlaugur Johannesson,A. S. Johnson,W. N. Johnson,Matthias Kadler,T. Kamae,Hideaki Katagiri,Jun Kataoka,Jürgen Knödlseder,M. Kuss,J. Lande,Luca Latronico,Sang Hun Lee,M. Lemoine-Goumard,Francesco Longo,F. Loparco,B. Lott,M. N. Lovellette,M. N. Lovellette,P. Lubrano,Grzegorz Madejski,A. Makeev,A. Makeev,Walter Max-Moerbeck,Mn Mazziotta,Julie McEnery,Julie McEnery,J. Mehault,Peter F. Michelson,W. Mitthumsiri,Tsunefumi Mizuno,A. A. Moiseev,A. A. Moiseev,C. Monte,M. E. Monzani,A. Morselli,Igor V. Moskalenko,S. Murgia,M. Naumann-Godo,Sho Nishino,P. L. Nolan,J. P. Norris,E. Nuss,T. Ohsugi,Atsushi Okumura,Nicola Omodei,E. Orlando,J. F. Ormes,David Paneque,David Paneque,J. H. Panetta,D. Parent,Vasiliki Pavlidou,T. J. Pearson,V. Pelassa,M. Pepe,Melissa Pesce-Rollins,F. Piron,T. A. Porter,S. Rainò,Riccardo Rando,M. Razzano,A. C. S. Readhead,A. Reimer,A. Reimer,Olaf Reimer,Olaf Reimer,Joseph L. Richards,Joachim Ripken,Steven Ritz,M. Roth,H. F.W. Sadrozinski,David Sánchez,A. Sander,Jeffrey D. Scargle,Carmelo Sgrò,E. J. Siskind,P. D. Smith,Gloria Spandre,P. Spinelli,Łukasz Stawarz,Mark Stevenson,M. S. Strickman,Kirill Sokolovsky,D. J. Suson,Hiromitsu Takahashi,Tadayuki Takahashi,Takaaki Tanaka,J. B. Thayer,J. G. Thayer,D. J. Thompson,L. Tibaldo,Diego F. Torres,G. Tosti,A. Tramacere,A. Tramacere,Yasunobu Uchiyama,T. L. Usher,Justin Vandenbroucke,V. Vasileiou,V. Vasileiou,N. Vilchez,V. Vitale,A. P. Waite,Paul J. Wang,Ann E. Wehrle,Brian L Winer,K. S. Wood,Zhenwei Yang,T. Ylinen,T. Ylinen,J. A. Zensus,M. Ziegler,Jelena Aleksić,L. A. Antonelli,P. Antoranz,Michael Backes,Juan Abel Barrio,J. Becerra González,J. Becerra González,W. Bednarek,Andrei Berdyugin,K. Berger,Elisa Bernardini,Adrian Biland,Oscar Blanch,R. K. Bock,A. Boller,G. Bonnoli,Pol Bordas,D. Borla Tridon,Valentí Bosch-Ramon,D. Bose,Ilana M. Braun,Thomas Bretz,M. Camara,E. Carmona,A. Carosi,Pierre Colin,E. Colombo,Jose Luis Contreras,Juan Cortina,Stefano Covino,Francesco Dazzi,A. De Angelis,E. De Cea del Pozo,B. De Lotto,M. De Maria,F. De Sabata,C. Delgado Mendez,A. Diago Ortega,A. Diago Ortega,M. Doert,Aaron Dominguez,D. Dominis Prester,Daniela Dorner,Michele Doro,Dominik Elsaesser,Daniel Ferenc,M. V. Fonseca,Ll. Font,R. J. García López,R. J. García López,M. Garczarczyk,Markus Gaug,Gianluca Giavitto,N. Godinovi,D. Hadasch,Artemio Herrero,Artemio Herrero,D. Hildebrand,D. Höhne-Mönch,J. Hose,Dario Hrupec,T. Jogler,S. Klepser,T. Krähenbühl,D. Kranich,J. Krause,A. La Barbera,E. Leonardo,Elina Lindfors,Saverio Lombardi,M. López,E. Lorenz,E. Lorenz,P. Majumdar,E. Makariev,G. Maneva,Nijil Mankuzhiyil,K. Mannheim,L. Maraschi,Mosè Mariotti,M. I. Martínez,Daniel Mazin,Mario Meucci,Jose Miguel Miranda,R. Mirzoyan,Hiroko Miyamoto,J. Moldón,Abelardo Moralejo,Daniel Nieto,K. Nilsson,Reiko Orito,I. Oya,Riccardo Paoletti,Josep M. Paredes,S. Partini,M. Pasanen,F. Pauss,R. Pegna,Miguel A. Pérez-Torres,Massimo Persic,J. Peruzzo,J. Pochon,P. G. Prada Moroni,Francisco Prada,Elisa Prandini,N. Puchades,Ivica Puljak,T. Reichardt,R. Reinthal,Wolfgang Rhode,Marc Ribó,J. Rico,M. Rissi,S. Rügamer,A. Saggion,K. Saito,Takashi Saito,M. Salvati,Miguel A. Sánchez-Conde,Miguel A. Sánchez-Conde,Konstancja Satalecka,V. Scalzotto,V. Scapin,C. Schultz,T. Schweizer,M. Shayduk,S. N. Shore,Agnieszka Sierpowska-Bartosik,A. Sillanpää,Julian Sitarek,Dorota Sobczyńska,Felix Spanier,S. Spiro,Antonio Stamerra,B. Steinke,J. Storz,N. Strah,J. C. Struebig,Tihomir Surić,L. O. Takalo,Fabrizio Tavecchio,Petar Temnikov,Tomislav Terzić,D. Tescaro,Masahiro Teshima,H. Vankov,Robert Wagner,Q. Weitzel,Victor Zabalza,Fabio Zandanel,R. Zanin,V. A. Acciari,T. C. Arlen,T. Aune,Wystan Benbow,D. Boltuch,S. M. Bradbury,J. H. Buckley,V. Bugaev,A. Cesarini,L. Ciupik,Wei Cui,R. Dickherber,Manel Errando,A. D. Falcone,J. P. Finley,G. Finnegan,Lucy Fortson,Amy Furniss,N. Galante,Daniel Gall,G. H. Gillanders,S. Godambe,J. Grube,R. Guenette,Geza Gyuk,D. S. Hanna,Jamie Holder,D. Huang,C. M. Hui,Thomas Brian Humensky,Philip Kaaret,N. Karlsson,M. Kertzman,David Kieda,A. Konopelko,Henric Krawczynski,F. Krennrich,M. J. Lang,Gernot Maier,S. McArthur,A. McCann,M. McCutcheon,P. Moriarty,Reshmi Mukherjee,R. A. Ong,A. N. Otte,D. Pandel,J. S. Perkins,A. Pichel,M. Pohl,John L. Quinn,K. Ragan,L. C. Reyes,P. T. Reynolds,E. Roache,H. J. Rose,A. C. Rovero,M. Schroedter,G. H. Sembroski,G. D. Şentürk,D. Steele,D. Steele,S. P. Swordy,G. Tešić,M. Theiling,S. Thibadeau,A. Varlotta,S. Vincent,S. P. Wakely,J. E. Ward,T. C. Weekes,Amanda Weinstein,T. Weisgarber,David A. Williams,Matthew Wood,B. Zitzer,M. Villata,C. M. Raiteri,Hugh D. Aller,M. F. Aller,A. A. Arkharov,Dmitry A. Blinov,P. Calcidese,Wen Ping Chen,N. V. Efimova,Givi N. Kimeridze,Tatiana S. Konstantinova,E. N. Kopatskaya,Ekaterina Koptelova,Omar M. Kurtanidze,Sofia O. Kurtanidze,Anne Lähteenmäki,Valeri M. Larionov,Valeri M. Larionov,Elena G. Larionova,L. V. Larionova,R. Ligustri,D. A. Morozova,M. G. Nikolashvili,Lorand A. Sigua,Ivan S. Troitsky,E. Angelakis,M. Capalbi,A. Carraminana,L. Carrasco,P. Cassaro,E. De la Fuente,Mark Gurwell,Yuri Y. Kovalev,Yu. A. Kovalev,Thomas P. Krichbaum,Hans A. Krimm,Hans A. Krimm,Paolo Leto,Matthew L. Lister,Giuseppe Maccaferri,Joseph Moody,Y. Mori,I. Nestoras,Andrea Orlati,C. Pagani,C. Pace,R. Pearson,M. Perri,B. G. Piner,Alexander B. Pushkarev,Eduardo Ros,Eduardo Ros,A. C. Sadun,T. Sakamoto,Merja Tornikoski,Y. Yatsu,A. C. Zook +474 more
TL;DR: In this paper, the gamma-ray activity of the blazar Mrk 501 during the first 480 days of Fermi operation was reported, and it was shown that the energy distribution of the freshly accelerated radiating electrons required to fit the time-averaged data has a broken power-law form in the energy range 0.3GeV-10TeV, with spectral indices 2.2 and 2.20.
Journal ArticleDOI
Detection of Pulsed Gamma Rays Above 100 GeV from the Crab Pulsar
E. Aliu,T. Arlen,T. Aune,M. Beilicke,Wystan Benbow,A. Bouvier,S. M. Bradbury,J. H. Buckley,V. Bugaev,Karen Byrum,A. Cannon,A. Cesarini,Jodi Christiansen,L. Ciupik,E. Collins-Hughes,M. P. Connolly,Wei Cui,R. Dickherber,C. Duke,Manel Errando,Abraham D. Falcone,J. P. Finley,G. Finnegan,Lucy Fortson,A. Furniss,N. Galante,Daniel Gall,K. G. Gibbs,G. H. Gillanders,S. Godambe,S. Griffin,J. Grube,R. Guenette,Geza Gyuk,D. Hanna,Jamie Holder,H. Huan,Gareth Hughes,C. M. Hui,T. B. Humensky,A. Imran,Philip Kaaret,N. Karlsson,M. Kertzman,David Kieda,Henric Krawczynski,Frank Krennrich,M. J. Lang,Maxim Lyutikov,A. S. Madhavan,Gernot Maier,P. Majumdar,S. McArthur,A. McCann,M. McCutcheon,P. Moriarty,Reshmi Mukherjee,Paul D. Nuñez,R. A. Ong,Matthew R. Orr,A. N. Otte,N. H. Park,J. S. Perkins,F. Pizlo,Martin Pohl,H. Prokoph,John L. Quinn,K. Ragan,L. C. Reyes,P. T. Reynolds,E. Roache,H. J. Rose,J. Ruppel,D. B. Saxon,M. Schroedter,G. H. Sembroski,G. D. Şentürk,A. W. Smith,D. Staszak,G. Tešić,M. Theiling,S. Thibadeau,K. Tsurusaki,J. Tyler,A. Varlotta,Vladimir Vassiliev,S. Vincent,M. Vivier,S. P. Wakely,J. E. Ward,T. C. Weekes,Amanda Weinstein,T. Weisgarber,David A. Williams,B. Zitzer +94 more
TL;DR: This detection constrains the mechanism and emission region of gamma-ray radiation in the pulsar’s magnetosphere and requires that these gamma rays be produced more than 10 stellar radii from the neutron star.