MAGIC discovery of very high energy emission from the FSRQ PKS 1222+21

Very high energy (VHE) gamma-ray emission from the flat spectrum radio quasar (FSRQ) PKS 1222+ 21 (4C 21.35, z = 0.432) was detected with the MAGIC Cherenkov telescopes during a short observation (similar to 0.5 hr) performed on 2010 June 17. The MAGIC detection coincides with high-energy MeV/ GeV g...

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Autores: Antoranz Canales, Pedro, Barrio Uña, Juan Abel, Contreras González, José Luis, Fonseca González, María Victoria, López Moya, Marcos, Miranda Pantoja, José Miguel, Nieto Castaño, Daniel, Scapin, Valeria
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/43894
Acceso en línea:https://hdl.handle.net/20.500.14352/43894
Access Level:acceso abierto
Palabra clave:537
539.1
Extragalactic Background Light
Active Galactic Nuclei
Gamma-Ray Absorption
Relativistic Jets
Upper Limits
3C 279
Blazars
Radiation
Spectra
Constraints.
Electrónica (Física)
Electricidad
Física nuclear
2202.03 Electricidad
2207 Física Atómica y Nuclear
id ES_ff0dfb5d3d3d0a8ff86c98950cc556cb
oai_identifier_str oai:docta.ucm.es:20.500.14352/43894
network_acronym_str ES
network_name_str España
repository_id_str
spelling MAGIC discovery of very high energy emission from the FSRQ PKS 1222+21Antoranz Canales, PedroBarrio Uña, Juan AbelContreras González, José LuisFonseca González, María VictoriaLópez Moya, MarcosMiranda Pantoja, José MiguelNieto Castaño, DanielScapin, Valeria537539.1Extragalactic Background LightActive Galactic NucleiGamma-Ray AbsorptionRelativistic JetsUpper Limits3C 279BlazarsRadiationSpectraConstraints.Electrónica (Física)ElectricidadFísica nuclear2202.03 Electricidad2207 Física Atómica y NuclearVery high energy (VHE) gamma-ray emission from the flat spectrum radio quasar (FSRQ) PKS 1222+ 21 (4C 21.35, z = 0.432) was detected with the MAGIC Cherenkov telescopes during a short observation (similar to 0.5 hr) performed on 2010 June 17. The MAGIC detection coincides with high-energy MeV/ GeV gamma-ray activity measured by the Large Area Telescope (LAT) on board the Fermi satellite. The VHE spectrum measured by MAGIC extends from about 70 GeV up to at least 400 GeV and can be well described by a power-law dN/dE proportional to E-Gamma with a photon index Gamma = 3.75 +/- 0.27(stat) +/- 0.2(syst). The averaged integral flux above 100 GeV is (4.6 +/- 0.5) x 10(-10) cm(-2) s(-1) (similar to 1 Crab Nebula flux). The VHE flux measured by MAGIC varies significantly within the 30 minute exposure implying a flux doubling time of about 10 minutes. The VHE and MeV/GeV spectra, corrected for the absorption by the extragalactic background light (EBL), can be described by a single power law with photon index 2.72 +/- 0.34 between 3 GeV and 400 GeV, and is consistent with emission belonging to a single component in the jet. The absence of a spectral cutoff constrains the gamma-ray emission region to lie outside the broad-line region, which would otherwise absorb the VHE gamma-rays. Together with the detected fast variability, this challenges present emission models from jets in FSRQs. Moreover, the combined Fermi/LAT and MAGIC spectral data yield constraints on the density of the EBL in the UV-optical to near-infrared range that are compatible with recent models.IOP PublishingUniversidad Complutense de Madrid20112011-03-2020112011-03-20journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/43894reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/438942026-06-02T12:44:21Z
dc.title.none.fl_str_mv MAGIC discovery of very high energy emission from the FSRQ PKS 1222+21
title MAGIC discovery of very high energy emission from the FSRQ PKS 1222+21
spellingShingle MAGIC discovery of very high energy emission from the FSRQ PKS 1222+21
Antoranz Canales, Pedro
537
539.1
Extragalactic Background Light
Active Galactic Nuclei
Gamma-Ray Absorption
Relativistic Jets
Upper Limits
3C 279
Blazars
Radiation
Spectra
Constraints.
Electrónica (Física)
Electricidad
Física nuclear
2202.03 Electricidad
2207 Física Atómica y Nuclear
title_short MAGIC discovery of very high energy emission from the FSRQ PKS 1222+21
title_full MAGIC discovery of very high energy emission from the FSRQ PKS 1222+21
title_fullStr MAGIC discovery of very high energy emission from the FSRQ PKS 1222+21
title_full_unstemmed MAGIC discovery of very high energy emission from the FSRQ PKS 1222+21
title_sort MAGIC discovery of very high energy emission from the FSRQ PKS 1222+21
dc.creator.none.fl_str_mv Antoranz Canales, Pedro
Barrio Uña, Juan Abel
Contreras González, José Luis
Fonseca González, María Victoria
López Moya, Marcos
Miranda Pantoja, José Miguel
Nieto Castaño, Daniel
Scapin, Valeria
author Antoranz Canales, Pedro
author_facet Antoranz Canales, Pedro
Barrio Uña, Juan Abel
Contreras González, José Luis
Fonseca González, María Victoria
López Moya, Marcos
Miranda Pantoja, José Miguel
Nieto Castaño, Daniel
Scapin, Valeria
author_role author
author2 Barrio Uña, Juan Abel
Contreras González, José Luis
Fonseca González, María Victoria
López Moya, Marcos
Miranda Pantoja, José Miguel
Nieto Castaño, Daniel
Scapin, Valeria
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 537
539.1
Extragalactic Background Light
Active Galactic Nuclei
Gamma-Ray Absorption
Relativistic Jets
Upper Limits
3C 279
Blazars
Radiation
Spectra
Constraints.
Electrónica (Física)
Electricidad
Física nuclear
2202.03 Electricidad
2207 Física Atómica y Nuclear
topic 537
539.1
Extragalactic Background Light
Active Galactic Nuclei
Gamma-Ray Absorption
Relativistic Jets
Upper Limits
3C 279
Blazars
Radiation
Spectra
Constraints.
Electrónica (Física)
Electricidad
Física nuclear
2202.03 Electricidad
2207 Física Atómica y Nuclear
description Very high energy (VHE) gamma-ray emission from the flat spectrum radio quasar (FSRQ) PKS 1222+ 21 (4C 21.35, z = 0.432) was detected with the MAGIC Cherenkov telescopes during a short observation (similar to 0.5 hr) performed on 2010 June 17. The MAGIC detection coincides with high-energy MeV/ GeV gamma-ray activity measured by the Large Area Telescope (LAT) on board the Fermi satellite. The VHE spectrum measured by MAGIC extends from about 70 GeV up to at least 400 GeV and can be well described by a power-law dN/dE proportional to E-Gamma with a photon index Gamma = 3.75 +/- 0.27(stat) +/- 0.2(syst). The averaged integral flux above 100 GeV is (4.6 +/- 0.5) x 10(-10) cm(-2) s(-1) (similar to 1 Crab Nebula flux). The VHE flux measured by MAGIC varies significantly within the 30 minute exposure implying a flux doubling time of about 10 minutes. The VHE and MeV/GeV spectra, corrected for the absorption by the extragalactic background light (EBL), can be described by a single power law with photon index 2.72 +/- 0.34 between 3 GeV and 400 GeV, and is consistent with emission belonging to a single component in the jet. The absence of a spectral cutoff constrains the gamma-ray emission region to lie outside the broad-line region, which would otherwise absorb the VHE gamma-rays. Together with the detected fast variability, this challenges present emission models from jets in FSRQs. Moreover, the combined Fermi/LAT and MAGIC spectral data yield constraints on the density of the EBL in the UV-optical to near-infrared range that are compatible with recent models.
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-03-20
2011
2011-03-20
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/43894
url https://hdl.handle.net/20.500.14352/43894
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869425740303302656
score 15,300719

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