Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS
- Autores
- Archambault, S.; Archer, A.; Benbow, W.; Buchovecky, M.; Bugaev, V.; Cerruti, M.; Connolly, M.P.; Cui, W.; Falcone, A.; Alonso, M. Fernández; Finley, J.P.; Fleischhack, H.; Fortson, L.; Furniss, A.; Griffin, S.; Hütten, M.; Hervet, O.; Holder, J.; Humensky, T.B.; Johnson, C.A.; Kaaret, P.; Kar, P.; Kieda, D.; Krause, M.; Krennrich, F.; Lang, M.J.; Lin, T.T.Y.; Maier, G.; McArthur, S.; Moriarty, P.; Nieto, D.; O'Brien, S.; Ong, R.A.; Otte, A.N.; Pohl, M.; Popkow, A.; Pueschel, E.; Quinn, J.; Ragan, K.; Reynolds, P.T.; Richards, G.T.; Roache, E.; Rovero, Adrian Carlos; Sadeh, I.; Shahinyan, K.; Staszak, D.; Telezhinsky, I.; Tyler, J.; Wakely, S.P.; Weinstein, A.; Weisgarber, T.; Wilcox, P.; Wilhelm, A.; Williams, D.A.; Zitzer, B.
- Año de publicación
- 2017
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We present a search for magnetically broadened gamma-ray emission around active galactic nuclei (AGNs), using VERITAS observations of seven hard-spectrum blazars. A cascade process occurs when multi-TeV gamma-rays from an AGN interact with extragalactic background light (EBL) photons to produce electron-positron pairs, which then interact with cosmic microwave background photons via inverse-Compton scattering to produce gamma-rays. Due to the deflection of the electron-positron pairs, a non-zero intergalactic magnetic field (IGMF) would potentially produce detectable effects on the angular distribution of the cascade emission. In particular, an angular broadening compared to the unscattered emission could occur. Through non-detection of angularly broadened emission from 1ES 1218+304, the source with the largest predicted cascade fraction, we exclude a range of IGMF strengths around 10-14 G at the 95% confidence level. The extent of the exclusion range varies with the assumptions made about the intrinsic spectrum of 1ES 1218+304 and the EBL model used in the simulation of the cascade process. All of the sources are used to set limits on the flux due to extended emission.
Fil: Archambault, S.. Mcgill University;
Fil: Archer, A.. Washington University in St. Louis; Estados Unidos
Fil: Benbow, W.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Buchovecky, M.. University of California at Los Angeles; Estados Unidos
Fil: Bugaev, V.. Washington University in St. Louis; Estados Unidos
Fil: Cerruti, M.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Connolly, M.P.. National University Of Ireland Galway;
Fil: Cui, W.. Tsinghua University; . Purdue University; Estados Unidos
Fil: Falcone, A.. Pennsylvania State University;
Fil: Alonso, M. Fernández. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Finley, J.P.. Purdue University; Estados Unidos
Fil: Fleischhack, H.. Deutsche Elektronen-synchrotron;
Fil: Fortson, L.. University of Minnesota; Estados Unidos
Fil: Furniss, A.. California State University; Estados Unidos
Fil: Griffin, S.. Mcgill University;
Fil: Hütten, M.. Deutsche Elektronen-synchrotron;
Fil: Hervet, O.. Santa Cruz Institute For Particle Physics;
Fil: Holder, J.. Bartol Research Institute;
Fil: Humensky, T.B.. Columbia University In The City Of New York;
Fil: Johnson, C.A.. Santa Cruz Institute For Particle Physics;
Fil: Kaaret, P.. University of Iowa; Estados Unidos
Fil: Kar, P.. University of Utah; Estados Unidos
Fil: Kieda, D.. University of Utah; Estados Unidos
Fil: Krause, M.. Deutsche Elektronen-synchrotron;
Fil: Krennrich, F.. IOWA STATE UNIVERSITY (ISU);
Fil: Lang, M.J.. National University Of Ireland Galway;
Fil: Lin, T.T.Y.. Mcgill University;
Fil: Maier, G.. Deutsche Elektronen-synchrotron;
Fil: McArthur, S.. Purdue University; Estados Unidos
Fil: Moriarty, P.. National University Of Ireland Galway;
Fil: Nieto, D.. Columbia University In The City Of New York;
Fil: O'Brien, S.. University College Dublin;
Fil: Ong, R.A.. University of California at Los Angeles; Estados Unidos
Fil: Otte, A.N.. Instituto Tecnológico de Georgia; Estados Unidos. Georgia Institute of Techology; Estados Unidos
Fil: Pohl, M.. Deutsche Elektronen-synchrotron; . Universitat Potsdam; Alemania
Fil: Popkow, A.. University of California at Los Angeles; Estados Unidos
Fil: Pueschel, E.. University College Dublin;
Fil: Quinn, J.. University College Dublin;
Fil: Ragan, K.. Mcgill University;
Fil: Reynolds, P.T.. Cork Institute Of Technology;
Fil: Richards, G.T.. Instituto Tecnológico de Georgia; Estados Unidos. Georgia Institute of Techology; Estados Unidos
Fil: Roache, E.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Rovero, Adrian Carlos. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Sadeh, I.. Deutsche Elektronen-synchrotron;
Fil: Shahinyan, K.. University of Minnesota; Estados Unidos
Fil: Staszak, D.. University of Chicago; Estados Unidos
Fil: Telezhinsky, I.. Deutsche Elektronen-synchrotron; . Universitat Potsdam; Alemania
Fil: Tyler, J.. Mcgill University;
Fil: Wakely, S.P.. University of Chicago; Estados Unidos
Fil: Weinstein, A.. IOWA STATE UNIVERSITY (ISU);
Fil: Weisgarber, T.. University Of Wisconsin Madison;
Fil: Wilcox, P.. University of Iowa; Estados Unidos
Fil: Wilhelm, A.. Deutsche Elektronen-synchrotron; . Universitat Potsdam; Alemania
Fil: Williams, D.A.. Santa Cruz Institute For Particle Physics;
Fil: Zitzer, B.. Mcgill University; - Materia
-
BL LACERTAE OBJECTS: GENERAL
GALAXIES: ACTIVE
GAMMA RAYS: GALAXIES
MAGNETIC FIELDS - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/42265
Ver los metadatos del registro completo
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Search for Magnetically Broadened Cascade Emission from Blazars with VERITASArchambault, S.Archer, A.Benbow, W.Buchovecky, M.Bugaev, V.Cerruti, M.Connolly, M.P.Cui, W.Falcone, A.Alonso, M. FernándezFinley, J.P.Fleischhack, H.Fortson, L.Furniss, A.Griffin, S.Hütten, M.Hervet, O.Holder, J.Humensky, T.B.Johnson, C.A.Kaaret, P.Kar, P.Kieda, D.Krause, M.Krennrich, F.Lang, M.J.Lin, T.T.Y.Maier, G.McArthur, S.Moriarty, P.Nieto, D.O'Brien, S.Ong, R.A.Otte, A.N.Pohl, M.Popkow, A.Pueschel, E.Quinn, J.Ragan, K.Reynolds, P.T.Richards, G.T.Roache, E.Rovero, Adrian CarlosSadeh, I.Shahinyan, K.Staszak, D.Telezhinsky, I.Tyler, J.Wakely, S.P.Weinstein, A.Weisgarber, T.Wilcox, P.Wilhelm, A.Williams, D.A.Zitzer, B.BL LACERTAE OBJECTS: GENERALGALAXIES: ACTIVEGAMMA RAYS: GALAXIESMAGNETIC FIELDShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present a search for magnetically broadened gamma-ray emission around active galactic nuclei (AGNs), using VERITAS observations of seven hard-spectrum blazars. A cascade process occurs when multi-TeV gamma-rays from an AGN interact with extragalactic background light (EBL) photons to produce electron-positron pairs, which then interact with cosmic microwave background photons via inverse-Compton scattering to produce gamma-rays. Due to the deflection of the electron-positron pairs, a non-zero intergalactic magnetic field (IGMF) would potentially produce detectable effects on the angular distribution of the cascade emission. In particular, an angular broadening compared to the unscattered emission could occur. Through non-detection of angularly broadened emission from 1ES 1218+304, the source with the largest predicted cascade fraction, we exclude a range of IGMF strengths around 10-14 G at the 95% confidence level. The extent of the exclusion range varies with the assumptions made about the intrinsic spectrum of 1ES 1218+304 and the EBL model used in the simulation of the cascade process. All of the sources are used to set limits on the flux due to extended emission.Fil: Archambault, S.. Mcgill University;Fil: Archer, A.. Washington University in St. Louis; Estados UnidosFil: Benbow, W.. Harvard-Smithsonian Center for Astrophysics; Estados UnidosFil: Buchovecky, M.. University of California at Los Angeles; Estados UnidosFil: Bugaev, V.. Washington University in St. Louis; Estados UnidosFil: Cerruti, M.. Harvard-Smithsonian Center for Astrophysics; Estados UnidosFil: Connolly, M.P.. National University Of Ireland Galway;Fil: Cui, W.. Tsinghua University; . Purdue University; Estados UnidosFil: Falcone, A.. Pennsylvania State University;Fil: Alonso, M. Fernández. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Finley, J.P.. Purdue University; Estados UnidosFil: Fleischhack, H.. Deutsche Elektronen-synchrotron;Fil: Fortson, L.. University of Minnesota; Estados UnidosFil: Furniss, A.. California State University; Estados UnidosFil: Griffin, S.. Mcgill University;Fil: Hütten, M.. Deutsche Elektronen-synchrotron;Fil: Hervet, O.. Santa Cruz Institute For Particle Physics;Fil: Holder, J.. Bartol Research Institute;Fil: Humensky, T.B.. Columbia University In The City Of New York;Fil: Johnson, C.A.. Santa Cruz Institute For Particle Physics;Fil: Kaaret, P.. University of Iowa; Estados UnidosFil: Kar, P.. University of Utah; Estados UnidosFil: Kieda, D.. University of Utah; Estados UnidosFil: Krause, M.. Deutsche Elektronen-synchrotron;Fil: Krennrich, F.. IOWA STATE UNIVERSITY (ISU);Fil: Lang, M.J.. National University Of Ireland Galway;Fil: Lin, T.T.Y.. Mcgill University;Fil: Maier, G.. Deutsche Elektronen-synchrotron;Fil: McArthur, S.. Purdue University; Estados UnidosFil: Moriarty, P.. National University Of Ireland Galway;Fil: Nieto, D.. Columbia University In The City Of New York;Fil: O'Brien, S.. University College Dublin;Fil: Ong, R.A.. University of California at Los Angeles; Estados UnidosFil: Otte, A.N.. Instituto Tecnológico de Georgia; Estados Unidos. Georgia Institute of Techology; Estados UnidosFil: Pohl, M.. Deutsche Elektronen-synchrotron; . Universitat Potsdam; AlemaniaFil: Popkow, A.. University of California at Los Angeles; Estados UnidosFil: Pueschel, E.. University College Dublin;Fil: Quinn, J.. University College Dublin;Fil: Ragan, K.. Mcgill University;Fil: Reynolds, P.T.. Cork Institute Of Technology;Fil: Richards, G.T.. Instituto Tecnológico de Georgia; Estados Unidos. Georgia Institute of Techology; Estados UnidosFil: Roache, E.. Harvard-Smithsonian Center for Astrophysics; Estados UnidosFil: Rovero, Adrian Carlos. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Sadeh, I.. Deutsche Elektronen-synchrotron;Fil: Shahinyan, K.. University of Minnesota; Estados UnidosFil: Staszak, D.. University of Chicago; Estados UnidosFil: Telezhinsky, I.. Deutsche Elektronen-synchrotron; . Universitat Potsdam; AlemaniaFil: Tyler, J.. Mcgill University;Fil: Wakely, S.P.. University of Chicago; Estados UnidosFil: Weinstein, A.. IOWA STATE UNIVERSITY (ISU);Fil: Weisgarber, T.. University Of Wisconsin Madison;Fil: Wilcox, P.. University of Iowa; Estados UnidosFil: Wilhelm, A.. Deutsche Elektronen-synchrotron; . Universitat Potsdam; AlemaniaFil: Williams, D.A.. Santa Cruz Institute For Particle Physics;Fil: Zitzer, B.. Mcgill University;IOP Publishing2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/42265Archambault, S.; Archer, A.; Benbow, W.; Buchovecky, M.; Bugaev, V.; et al.; Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS; IOP Publishing; Astrophysical Journal; 835; 2; 20170004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/835/2/288info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.3847/1538-4357/835/2/288/metainfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:20:03Zoai:ri.conicet.gov.ar:11336/42265instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:20:04.011CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS |
title |
Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS |
spellingShingle |
Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS Archambault, S. BL LACERTAE OBJECTS: GENERAL GALAXIES: ACTIVE GAMMA RAYS: GALAXIES MAGNETIC FIELDS |
title_short |
Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS |
title_full |
Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS |
title_fullStr |
Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS |
title_full_unstemmed |
Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS |
title_sort |
Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS |
dc.creator.none.fl_str_mv |
Archambault, S. Archer, A. Benbow, W. Buchovecky, M. Bugaev, V. Cerruti, M. Connolly, M.P. Cui, W. Falcone, A. Alonso, M. Fernández Finley, J.P. Fleischhack, H. Fortson, L. Furniss, A. Griffin, S. Hütten, M. Hervet, O. Holder, J. Humensky, T.B. Johnson, C.A. Kaaret, P. Kar, P. Kieda, D. Krause, M. Krennrich, F. Lang, M.J. Lin, T.T.Y. Maier, G. McArthur, S. Moriarty, P. Nieto, D. O'Brien, S. Ong, R.A. Otte, A.N. Pohl, M. Popkow, A. Pueschel, E. Quinn, J. Ragan, K. Reynolds, P.T. Richards, G.T. Roache, E. Rovero, Adrian Carlos Sadeh, I. Shahinyan, K. Staszak, D. Telezhinsky, I. Tyler, J. Wakely, S.P. Weinstein, A. Weisgarber, T. Wilcox, P. Wilhelm, A. Williams, D.A. Zitzer, B. |
author |
Archambault, S. |
author_facet |
Archambault, S. Archer, A. Benbow, W. Buchovecky, M. Bugaev, V. Cerruti, M. Connolly, M.P. Cui, W. Falcone, A. Alonso, M. Fernández Finley, J.P. Fleischhack, H. Fortson, L. Furniss, A. Griffin, S. Hütten, M. Hervet, O. Holder, J. Humensky, T.B. Johnson, C.A. Kaaret, P. Kar, P. Kieda, D. Krause, M. Krennrich, F. Lang, M.J. Lin, T.T.Y. Maier, G. McArthur, S. Moriarty, P. Nieto, D. O'Brien, S. Ong, R.A. Otte, A.N. Pohl, M. Popkow, A. Pueschel, E. Quinn, J. Ragan, K. Reynolds, P.T. Richards, G.T. Roache, E. Rovero, Adrian Carlos Sadeh, I. Shahinyan, K. Staszak, D. Telezhinsky, I. Tyler, J. Wakely, S.P. Weinstein, A. Weisgarber, T. Wilcox, P. Wilhelm, A. Williams, D.A. Zitzer, B. |
author_role |
author |
author2 |
Archer, A. Benbow, W. Buchovecky, M. Bugaev, V. Cerruti, M. Connolly, M.P. Cui, W. Falcone, A. Alonso, M. Fernández Finley, J.P. Fleischhack, H. Fortson, L. Furniss, A. Griffin, S. Hütten, M. Hervet, O. Holder, J. Humensky, T.B. Johnson, C.A. Kaaret, P. Kar, P. Kieda, D. Krause, M. Krennrich, F. Lang, M.J. Lin, T.T.Y. Maier, G. McArthur, S. Moriarty, P. Nieto, D. O'Brien, S. Ong, R.A. Otte, A.N. Pohl, M. Popkow, A. Pueschel, E. Quinn, J. Ragan, K. Reynolds, P.T. Richards, G.T. Roache, E. Rovero, Adrian Carlos Sadeh, I. Shahinyan, K. Staszak, D. Telezhinsky, I. Tyler, J. Wakely, S.P. Weinstein, A. Weisgarber, T. Wilcox, P. Wilhelm, A. Williams, D.A. Zitzer, B. |
author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
dc.subject.none.fl_str_mv |
BL LACERTAE OBJECTS: GENERAL GALAXIES: ACTIVE GAMMA RAYS: GALAXIES MAGNETIC FIELDS |
topic |
BL LACERTAE OBJECTS: GENERAL GALAXIES: ACTIVE GAMMA RAYS: GALAXIES MAGNETIC FIELDS |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
We present a search for magnetically broadened gamma-ray emission around active galactic nuclei (AGNs), using VERITAS observations of seven hard-spectrum blazars. A cascade process occurs when multi-TeV gamma-rays from an AGN interact with extragalactic background light (EBL) photons to produce electron-positron pairs, which then interact with cosmic microwave background photons via inverse-Compton scattering to produce gamma-rays. Due to the deflection of the electron-positron pairs, a non-zero intergalactic magnetic field (IGMF) would potentially produce detectable effects on the angular distribution of the cascade emission. In particular, an angular broadening compared to the unscattered emission could occur. Through non-detection of angularly broadened emission from 1ES 1218+304, the source with the largest predicted cascade fraction, we exclude a range of IGMF strengths around 10-14 G at the 95% confidence level. The extent of the exclusion range varies with the assumptions made about the intrinsic spectrum of 1ES 1218+304 and the EBL model used in the simulation of the cascade process. All of the sources are used to set limits on the flux due to extended emission. Fil: Archambault, S.. Mcgill University; Fil: Archer, A.. Washington University in St. Louis; Estados Unidos Fil: Benbow, W.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos Fil: Buchovecky, M.. University of California at Los Angeles; Estados Unidos Fil: Bugaev, V.. Washington University in St. Louis; Estados Unidos Fil: Cerruti, M.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos Fil: Connolly, M.P.. National University Of Ireland Galway; Fil: Cui, W.. Tsinghua University; . Purdue University; Estados Unidos Fil: Falcone, A.. Pennsylvania State University; Fil: Alonso, M. Fernández. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina Fil: Finley, J.P.. Purdue University; Estados Unidos Fil: Fleischhack, H.. Deutsche Elektronen-synchrotron; Fil: Fortson, L.. University of Minnesota; Estados Unidos Fil: Furniss, A.. California State University; Estados Unidos Fil: Griffin, S.. Mcgill University; Fil: Hütten, M.. Deutsche Elektronen-synchrotron; Fil: Hervet, O.. Santa Cruz Institute For Particle Physics; Fil: Holder, J.. Bartol Research Institute; Fil: Humensky, T.B.. Columbia University In The City Of New York; Fil: Johnson, C.A.. Santa Cruz Institute For Particle Physics; Fil: Kaaret, P.. University of Iowa; Estados Unidos Fil: Kar, P.. University of Utah; Estados Unidos Fil: Kieda, D.. University of Utah; Estados Unidos Fil: Krause, M.. Deutsche Elektronen-synchrotron; Fil: Krennrich, F.. IOWA STATE UNIVERSITY (ISU); Fil: Lang, M.J.. National University Of Ireland Galway; Fil: Lin, T.T.Y.. Mcgill University; Fil: Maier, G.. Deutsche Elektronen-synchrotron; Fil: McArthur, S.. Purdue University; Estados Unidos Fil: Moriarty, P.. National University Of Ireland Galway; Fil: Nieto, D.. Columbia University In The City Of New York; Fil: O'Brien, S.. University College Dublin; Fil: Ong, R.A.. University of California at Los Angeles; Estados Unidos Fil: Otte, A.N.. Instituto Tecnológico de Georgia; Estados Unidos. Georgia Institute of Techology; Estados Unidos Fil: Pohl, M.. Deutsche Elektronen-synchrotron; . Universitat Potsdam; Alemania Fil: Popkow, A.. University of California at Los Angeles; Estados Unidos Fil: Pueschel, E.. University College Dublin; Fil: Quinn, J.. University College Dublin; Fil: Ragan, K.. Mcgill University; Fil: Reynolds, P.T.. Cork Institute Of Technology; Fil: Richards, G.T.. Instituto Tecnológico de Georgia; Estados Unidos. Georgia Institute of Techology; Estados Unidos Fil: Roache, E.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos Fil: Rovero, Adrian Carlos. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina Fil: Sadeh, I.. Deutsche Elektronen-synchrotron; Fil: Shahinyan, K.. University of Minnesota; Estados Unidos Fil: Staszak, D.. University of Chicago; Estados Unidos Fil: Telezhinsky, I.. Deutsche Elektronen-synchrotron; . Universitat Potsdam; Alemania Fil: Tyler, J.. Mcgill University; Fil: Wakely, S.P.. University of Chicago; Estados Unidos Fil: Weinstein, A.. IOWA STATE UNIVERSITY (ISU); Fil: Weisgarber, T.. University Of Wisconsin Madison; Fil: Wilcox, P.. University of Iowa; Estados Unidos Fil: Wilhelm, A.. Deutsche Elektronen-synchrotron; . Universitat Potsdam; Alemania Fil: Williams, D.A.. Santa Cruz Institute For Particle Physics; Fil: Zitzer, B.. Mcgill University; |
description |
We present a search for magnetically broadened gamma-ray emission around active galactic nuclei (AGNs), using VERITAS observations of seven hard-spectrum blazars. A cascade process occurs when multi-TeV gamma-rays from an AGN interact with extragalactic background light (EBL) photons to produce electron-positron pairs, which then interact with cosmic microwave background photons via inverse-Compton scattering to produce gamma-rays. Due to the deflection of the electron-positron pairs, a non-zero intergalactic magnetic field (IGMF) would potentially produce detectable effects on the angular distribution of the cascade emission. In particular, an angular broadening compared to the unscattered emission could occur. Through non-detection of angularly broadened emission from 1ES 1218+304, the source with the largest predicted cascade fraction, we exclude a range of IGMF strengths around 10-14 G at the 95% confidence level. The extent of the exclusion range varies with the assumptions made about the intrinsic spectrum of 1ES 1218+304 and the EBL model used in the simulation of the cascade process. All of the sources are used to set limits on the flux due to extended emission. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/42265 Archambault, S.; Archer, A.; Benbow, W.; Buchovecky, M.; Bugaev, V.; et al.; Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS; IOP Publishing; Astrophysical Journal; 835; 2; 2017 0004-637X CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/42265 |
identifier_str_mv |
Archambault, S.; Archer, A.; Benbow, W.; Buchovecky, M.; Bugaev, V.; et al.; Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS; IOP Publishing; Astrophysical Journal; 835; 2; 2017 0004-637X CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/835/2/288 info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.3847/1538-4357/835/2/288/meta |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
IOP Publishing |
publisher.none.fl_str_mv |
IOP Publishing |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
_version_ |
1844614178109652992 |
score |
13.070432 |