Multiwavelength Observations of the very high energy Blazar 1ES2344+514

Autores
Acciari, V. A.; Aliu, E.; Arlen, T.; Aune, T.; Beilicke, M.; Benbow, W.; Boltuch, D.; Bugaev, V.; Cannon, A.; Ciupik, L.; Cogan, P.; Colin, P.; Dickherber, R.; Falcone, A.; Fegan, S. J.; Finley, J. P.; Fortin, P.; Fortson, L. F.; Furniss, A.; Gall, D.; Gillanders, G. H.; Grube, J.; Guenette, R.; Gyup, G.; Hanna, D.; Holder, J.; Horan, D.; Hui, C. M.; Humensky, T. B.; Pichel, Ana Carolina
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Multiwavelength observations of the high-frequency-peaked blazar 1ES 2344+514 were performed from October 2007 to January 2008. The campaign represents the first contemporanous data on the object at very high energy (VHE, E > 100 GeV) gamma-ray, X-ray, and UV energies. Observations with VERITAS in VHE gamma-rays yield a strong detection of 20 sigmas with 633 excess events in a total exposure of 18.1 hours live-time. A strong VHE gamma-ray flare on December 7, 2007 is measured at F(>300 GeV) = (6.76 ± 0.62) × 10^-11 cm^-2 s^-1 , corresponding to 48% of the Crab Nebula flux. Excluding this flaring episode, nightly variability at lower fluxes is observed with a time-averaged mean of F(>300 GeV) = (1.06 ± 0.09) × 10^-11 cm^-2 s^-1 (7.6% of the Crab Nebula flux). The differential photon spectrum between 390 GeV and 8.3 TeV for the time-averaged observations excluding December 7, 2007 is well described by a power law with a photon index of 2.78 ± 0.09 (stat) ± 0.15 (syst). A slightly harder photon index of 2.43 ± 0.22stat ± 0.15syst is measured on the flaring night of December 7, 2007. Over the full period of VERITAS observations contemporaneous X-ray and UV data were taken with Swift and RXTE. Variability by a factor of ~7 is evident in the 2-10 keV flux between nightly observations. On December 8, 2007 the highest ever observed X-ray flux from 1ES 2344+514 was measured by Swift XRT at a flux of F(2-10 keV) = (6.58 ± 0.37) × 10^-11 erg cm^-2 s^-1. Evidence for a correlation between the X-ray flux and VHE gamma-ray flux on nightly time-scales is indicated with a Pearson correlation coefficient of r = 0.60 ± 0.11. Contemporaneous spectral energy distributions (SEDs) of 1ES 2344+514 are presented for two distinct flux states. A one-zone synchrotron self-Compton (SSC) model describes both SEDs using parameters consistent with previous SSC modeling of 1ES 2344+514 from non-contemporaneous observations.
Fil: Acciari, V. A.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Aliu, E.. University of Delaware; Estados Unidos
Fil: Arlen, T.. University of California; Estados Unidos
Fil: Aune, T.. University of California; Estados Unidos
Fil: Beilicke, M.. University of Washington; Estados Unidos
Fil: Benbow, W.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Boltuch, D.. University of Delaware; Estados Unidos
Fil: Bugaev, V.. University of Washington; Estados Unidos
Fil: Cannon, A.. University College Dublin; Irlanda
Fil: Ciupik, L.. Adler Planetarium and Astronomy Museum; Estados Unidos
Fil: Cogan, P.. McGill University; Canadá
Fil: Colin, P.. University of Utah; Estados Unidos
Fil: Dickherber, R.. University of Washington; Estados Unidos
Fil: Falcone, A.. University of Pennsylvania; Estados Unidos
Fil: Fegan, S. J.. University of California; Estados Unidos
Fil: Finley, J. P.. Purdue University; Estados Unidos
Fil: Fortin, P.. Columbia University; Estados Unidos
Fil: Fortson, L. F.. Adler Planetarium and Astronomy Museum; Estados Unidos
Fil: Furniss, A.. University of California; Estados Unidos
Fil: Gall, D.. Purdue University; Estados Unidos
Fil: Gillanders, G. H.. National University of Ireland; Irlanda
Fil: Grube, J.. University College Dublin; Irlanda
Fil: Guenette, R.. McGill University; Canadá
Fil: Gyup, G.. Adler Planetarium and Astronomy Museum; Estados Unidos
Fil: Hanna, D.. McGill University; Canadá
Fil: Holder, J.. University of Delaware; Estados Unidos
Fil: Horan, D.. Ecole Polytechnique; Francia
Fil: Hui, C. M.. University of Utah; Estados Unidos
Fil: Humensky, T. B.. University Of Chicago; Estados Unidos
Fil: Pichel, Ana Carolina. 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
Materia
galaxies
BL Lacertae objects
individual
1ES 2344+514
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:11336/20253

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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Multiwavelength Observations of the very high energy Blazar 1ES2344+514Acciari, V. A.Aliu, E.Arlen, T.Aune, T.Beilicke, M.Benbow, W.Boltuch, D.Bugaev, V.Cannon, A.Ciupik, L.Cogan, P.Colin, P.Dickherber, R.Falcone, A.Fegan, S. J.Finley, J. P.Fortin, P.Fortson, L. F.Furniss, A.Gall, D.Gillanders, G. H.Grube, J.Guenette, R.Gyup, G.Hanna, D.Holder, J.Horan, D.Hui, C. M.Humensky, T. B.Pichel, Ana CarolinagalaxiesBL Lacertae objectsindividual1ES 2344+514https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Multiwavelength observations of the high-frequency-peaked blazar 1ES 2344+514 were performed from October 2007 to January 2008. The campaign represents the first contemporanous data on the object at very high energy (VHE, E > 100 GeV) gamma-ray, X-ray, and UV energies. Observations with VERITAS in VHE gamma-rays yield a strong detection of 20 sigmas with 633 excess events in a total exposure of 18.1 hours live-time. A strong VHE gamma-ray flare on December 7, 2007 is measured at F(>300 GeV) = (6.76 ± 0.62) × 10^-11 cm^-2 s^-1 , corresponding to 48% of the Crab Nebula flux. Excluding this flaring episode, nightly variability at lower fluxes is observed with a time-averaged mean of F(>300 GeV) = (1.06 ± 0.09) × 10^-11 cm^-2 s^-1 (7.6% of the Crab Nebula flux). The differential photon spectrum between 390 GeV and 8.3 TeV for the time-averaged observations excluding December 7, 2007 is well described by a power law with a photon index of 2.78 ± 0.09 (stat) ± 0.15 (syst). A slightly harder photon index of 2.43 ± 0.22stat ± 0.15syst is measured on the flaring night of December 7, 2007. Over the full period of VERITAS observations contemporaneous X-ray and UV data were taken with Swift and RXTE. Variability by a factor of ~7 is evident in the 2-10 keV flux between nightly observations. On December 8, 2007 the highest ever observed X-ray flux from 1ES 2344+514 was measured by Swift XRT at a flux of F(2-10 keV) = (6.58 ± 0.37) × 10^-11 erg cm^-2 s^-1. Evidence for a correlation between the X-ray flux and VHE gamma-ray flux on nightly time-scales is indicated with a Pearson correlation coefficient of r = 0.60 ± 0.11. Contemporaneous spectral energy distributions (SEDs) of 1ES 2344+514 are presented for two distinct flux states. A one-zone synchrotron self-Compton (SSC) model describes both SEDs using parameters consistent with previous SSC modeling of 1ES 2344+514 from non-contemporaneous observations.Fil: Acciari, V. A.. Harvard-Smithsonian Center for Astrophysics; Estados UnidosFil: Aliu, E.. University of Delaware; Estados UnidosFil: Arlen, T.. University of California; Estados UnidosFil: Aune, T.. University of California; Estados UnidosFil: Beilicke, M.. University of Washington; Estados UnidosFil: Benbow, W.. Harvard-Smithsonian Center for Astrophysics; Estados UnidosFil: Boltuch, D.. University of Delaware; Estados UnidosFil: Bugaev, V.. University of Washington; Estados UnidosFil: Cannon, A.. University College Dublin; IrlandaFil: Ciupik, L.. Adler Planetarium and Astronomy Museum; Estados UnidosFil: Cogan, P.. McGill University; CanadáFil: Colin, P.. University of Utah; Estados UnidosFil: Dickherber, R.. University of Washington; Estados UnidosFil: Falcone, A.. University of Pennsylvania; Estados UnidosFil: Fegan, S. J.. University of California; Estados UnidosFil: Finley, J. P.. Purdue University; Estados UnidosFil: Fortin, P.. Columbia University; Estados UnidosFil: Fortson, L. F.. Adler Planetarium and Astronomy Museum; Estados UnidosFil: Furniss, A.. University of California; Estados UnidosFil: Gall, D.. Purdue University; Estados UnidosFil: Gillanders, G. H.. National University of Ireland; IrlandaFil: Grube, J.. University College Dublin; IrlandaFil: Guenette, R.. McGill University; CanadáFil: Gyup, G.. Adler Planetarium and Astronomy Museum; Estados UnidosFil: Hanna, D.. McGill University; CanadáFil: Holder, J.. University of Delaware; Estados UnidosFil: Horan, D.. Ecole Polytechnique; FranciaFil: Hui, C. M.. University of Utah; Estados UnidosFil: Humensky, T. B.. University Of Chicago; Estados UnidosFil: Pichel, Ana Carolina. 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; ArgentinaIOP Publishing2011-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/20253Acciari, V. A.; Aliu, E.; Arlen, T.; Aune, T.; Beilicke, M.; et al.; Multiwavelength Observations of the very high energy Blazar 1ES2344+514; IOP Publishing; Astrophysical Journal; 738; 2; 7-2011; 1-8; 1690004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/738/2/169info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-637X/738/2/169/metainfo:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1106.4594info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:35:01Zoai:ri.conicet.gov.ar:11336/20253instacron: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 10:35:01.498CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Multiwavelength Observations of the very high energy Blazar 1ES2344+514
title Multiwavelength Observations of the very high energy Blazar 1ES2344+514
spellingShingle Multiwavelength Observations of the very high energy Blazar 1ES2344+514
Acciari, V. A.
galaxies
BL Lacertae objects
individual
1ES 2344+514
title_short Multiwavelength Observations of the very high energy Blazar 1ES2344+514
title_full Multiwavelength Observations of the very high energy Blazar 1ES2344+514
title_fullStr Multiwavelength Observations of the very high energy Blazar 1ES2344+514
title_full_unstemmed Multiwavelength Observations of the very high energy Blazar 1ES2344+514
title_sort Multiwavelength Observations of the very high energy Blazar 1ES2344+514
dc.creator.none.fl_str_mv Acciari, V. A.
Aliu, E.
Arlen, T.
Aune, T.
Beilicke, M.
Benbow, W.
Boltuch, D.
Bugaev, V.
Cannon, A.
Ciupik, L.
Cogan, P.
Colin, P.
Dickherber, R.
Falcone, A.
Fegan, S. J.
Finley, J. P.
Fortin, P.
Fortson, L. F.
Furniss, A.
Gall, D.
Gillanders, G. H.
Grube, J.
Guenette, R.
Gyup, G.
Hanna, D.
Holder, J.
Horan, D.
Hui, C. M.
Humensky, T. B.
Pichel, Ana Carolina
author Acciari, V. A.
author_facet Acciari, V. A.
Aliu, E.
Arlen, T.
Aune, T.
Beilicke, M.
Benbow, W.
Boltuch, D.
Bugaev, V.
Cannon, A.
Ciupik, L.
Cogan, P.
Colin, P.
Dickherber, R.
Falcone, A.
Fegan, S. J.
Finley, J. P.
Fortin, P.
Fortson, L. F.
Furniss, A.
Gall, D.
Gillanders, G. H.
Grube, J.
Guenette, R.
Gyup, G.
Hanna, D.
Holder, J.
Horan, D.
Hui, C. M.
Humensky, T. B.
Pichel, Ana Carolina
author_role author
author2 Aliu, E.
Arlen, T.
Aune, T.
Beilicke, M.
Benbow, W.
Boltuch, D.
Bugaev, V.
Cannon, A.
Ciupik, L.
Cogan, P.
Colin, P.
Dickherber, R.
Falcone, A.
Fegan, S. J.
Finley, J. P.
Fortin, P.
Fortson, L. F.
Furniss, A.
Gall, D.
Gillanders, G. H.
Grube, J.
Guenette, R.
Gyup, G.
Hanna, D.
Holder, J.
Horan, D.
Hui, C. M.
Humensky, T. B.
Pichel, Ana Carolina
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
dc.subject.none.fl_str_mv galaxies
BL Lacertae objects
individual
1ES 2344+514
topic galaxies
BL Lacertae objects
individual
1ES 2344+514
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Multiwavelength observations of the high-frequency-peaked blazar 1ES 2344+514 were performed from October 2007 to January 2008. The campaign represents the first contemporanous data on the object at very high energy (VHE, E > 100 GeV) gamma-ray, X-ray, and UV energies. Observations with VERITAS in VHE gamma-rays yield a strong detection of 20 sigmas with 633 excess events in a total exposure of 18.1 hours live-time. A strong VHE gamma-ray flare on December 7, 2007 is measured at F(>300 GeV) = (6.76 ± 0.62) × 10^-11 cm^-2 s^-1 , corresponding to 48% of the Crab Nebula flux. Excluding this flaring episode, nightly variability at lower fluxes is observed with a time-averaged mean of F(>300 GeV) = (1.06 ± 0.09) × 10^-11 cm^-2 s^-1 (7.6% of the Crab Nebula flux). The differential photon spectrum between 390 GeV and 8.3 TeV for the time-averaged observations excluding December 7, 2007 is well described by a power law with a photon index of 2.78 ± 0.09 (stat) ± 0.15 (syst). A slightly harder photon index of 2.43 ± 0.22stat ± 0.15syst is measured on the flaring night of December 7, 2007. Over the full period of VERITAS observations contemporaneous X-ray and UV data were taken with Swift and RXTE. Variability by a factor of ~7 is evident in the 2-10 keV flux between nightly observations. On December 8, 2007 the highest ever observed X-ray flux from 1ES 2344+514 was measured by Swift XRT at a flux of F(2-10 keV) = (6.58 ± 0.37) × 10^-11 erg cm^-2 s^-1. Evidence for a correlation between the X-ray flux and VHE gamma-ray flux on nightly time-scales is indicated with a Pearson correlation coefficient of r = 0.60 ± 0.11. Contemporaneous spectral energy distributions (SEDs) of 1ES 2344+514 are presented for two distinct flux states. A one-zone synchrotron self-Compton (SSC) model describes both SEDs using parameters consistent with previous SSC modeling of 1ES 2344+514 from non-contemporaneous observations.
Fil: Acciari, V. A.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Aliu, E.. University of Delaware; Estados Unidos
Fil: Arlen, T.. University of California; Estados Unidos
Fil: Aune, T.. University of California; Estados Unidos
Fil: Beilicke, M.. University of Washington; Estados Unidos
Fil: Benbow, W.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Boltuch, D.. University of Delaware; Estados Unidos
Fil: Bugaev, V.. University of Washington; Estados Unidos
Fil: Cannon, A.. University College Dublin; Irlanda
Fil: Ciupik, L.. Adler Planetarium and Astronomy Museum; Estados Unidos
Fil: Cogan, P.. McGill University; Canadá
Fil: Colin, P.. University of Utah; Estados Unidos
Fil: Dickherber, R.. University of Washington; Estados Unidos
Fil: Falcone, A.. University of Pennsylvania; Estados Unidos
Fil: Fegan, S. J.. University of California; Estados Unidos
Fil: Finley, J. P.. Purdue University; Estados Unidos
Fil: Fortin, P.. Columbia University; Estados Unidos
Fil: Fortson, L. F.. Adler Planetarium and Astronomy Museum; Estados Unidos
Fil: Furniss, A.. University of California; Estados Unidos
Fil: Gall, D.. Purdue University; Estados Unidos
Fil: Gillanders, G. H.. National University of Ireland; Irlanda
Fil: Grube, J.. University College Dublin; Irlanda
Fil: Guenette, R.. McGill University; Canadá
Fil: Gyup, G.. Adler Planetarium and Astronomy Museum; Estados Unidos
Fil: Hanna, D.. McGill University; Canadá
Fil: Holder, J.. University of Delaware; Estados Unidos
Fil: Horan, D.. Ecole Polytechnique; Francia
Fil: Hui, C. M.. University of Utah; Estados Unidos
Fil: Humensky, T. B.. University Of Chicago; Estados Unidos
Fil: Pichel, Ana Carolina. 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
description Multiwavelength observations of the high-frequency-peaked blazar 1ES 2344+514 were performed from October 2007 to January 2008. The campaign represents the first contemporanous data on the object at very high energy (VHE, E > 100 GeV) gamma-ray, X-ray, and UV energies. Observations with VERITAS in VHE gamma-rays yield a strong detection of 20 sigmas with 633 excess events in a total exposure of 18.1 hours live-time. A strong VHE gamma-ray flare on December 7, 2007 is measured at F(>300 GeV) = (6.76 ± 0.62) × 10^-11 cm^-2 s^-1 , corresponding to 48% of the Crab Nebula flux. Excluding this flaring episode, nightly variability at lower fluxes is observed with a time-averaged mean of F(>300 GeV) = (1.06 ± 0.09) × 10^-11 cm^-2 s^-1 (7.6% of the Crab Nebula flux). The differential photon spectrum between 390 GeV and 8.3 TeV for the time-averaged observations excluding December 7, 2007 is well described by a power law with a photon index of 2.78 ± 0.09 (stat) ± 0.15 (syst). A slightly harder photon index of 2.43 ± 0.22stat ± 0.15syst is measured on the flaring night of December 7, 2007. Over the full period of VERITAS observations contemporaneous X-ray and UV data were taken with Swift and RXTE. Variability by a factor of ~7 is evident in the 2-10 keV flux between nightly observations. On December 8, 2007 the highest ever observed X-ray flux from 1ES 2344+514 was measured by Swift XRT at a flux of F(2-10 keV) = (6.58 ± 0.37) × 10^-11 erg cm^-2 s^-1. Evidence for a correlation between the X-ray flux and VHE gamma-ray flux on nightly time-scales is indicated with a Pearson correlation coefficient of r = 0.60 ± 0.11. Contemporaneous spectral energy distributions (SEDs) of 1ES 2344+514 are presented for two distinct flux states. A one-zone synchrotron self-Compton (SSC) model describes both SEDs using parameters consistent with previous SSC modeling of 1ES 2344+514 from non-contemporaneous observations.
publishDate 2011
dc.date.none.fl_str_mv 2011-07
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/11336/20253
Acciari, V. A.; Aliu, E.; Arlen, T.; Aune, T.; Beilicke, M.; et al.; Multiwavelength Observations of the very high energy Blazar 1ES2344+514; IOP Publishing; Astrophysical Journal; 738; 2; 7-2011; 1-8; 169
0004-637X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/20253
identifier_str_mv Acciari, V. A.; Aliu, E.; Arlen, T.; Aune, T.; Beilicke, M.; et al.; Multiwavelength Observations of the very high energy Blazar 1ES2344+514; IOP Publishing; Astrophysical Journal; 738; 2; 7-2011; 1-8; 169
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/10.1088/0004-637X/738/2/169
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-637X/738/2/169/meta
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1106.4594
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
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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