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
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/20253
Ver los metadatos del registro completo
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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 Técnicas2025-10-22T12:07:23Zoai: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:34982025-10-22 12:07:23.456CONICET 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 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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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 |
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eng |
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