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
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/42265

id CONICETDig_85c4008e00016fc787862f831b98fa17
oai_identifier_str oai:ri.conicet.gov.ar:11336/42265
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling 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
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score 13.070432