MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011
Aims. We study the multifrequency emission and spectral properties of the quasar 3C 279 aimed at identifying the radiation processes taking place in the source. Methods. We observed 3C 279 in very-high-energy (VHE, E > 100GeV) gamma-rays, with the MAGIC telescopes during 2011, for the first time...
| Autores: | , , , , , , , |
|---|---|
| Formato: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Recursos: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/33894 |
| Acesso em linha: | https://hdl.handle.net/20.500.14352/33894 |
| Access Level: | acceso abierto |
| Palavra-chave: | 537 539.1 Active galactic nuclei Large-area telescope Gamma-ray emission PKS 1510-089 Multiwavelength observations Relativistic jet Blazar 3C-279 Inner jet X-ray Variability. Electricidad Electrónica (Física) Física nuclear 2202.03 Electricidad 2207 Física Atómica y Nuclear |
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MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011Antoranz Canales, PedroBarrio Uña, Juan AbelContreras González, José LuisFonseca González, María VictoriaLópez Moya, MarcosMiranda Pantoja, José MiguelSatalecka, KonstanzjaScapin, Valeria537539.1Active galactic nucleiLarge-area telescopeGamma-ray emissionPKS 1510-089Multiwavelength observationsRelativistic jetBlazar 3C-279Inner jetX-rayVariability.ElectricidadElectrónica (Física)Física nuclear2202.03 Electricidad2207 Física Atómica y NuclearAims. We study the multifrequency emission and spectral properties of the quasar 3C 279 aimed at identifying the radiation processes taking place in the source. Methods. We observed 3C 279 in very-high-energy (VHE, E > 100GeV) gamma-rays, with the MAGIC telescopes during 2011, for the first time in stereoscopic mode. We combined these measurements with observations at other energy bands: in high-energy (HE, E > 100MeV) gamma-rays from Fermi–LAT; in X-rays from RXTE; in the optical from the KVA telescope; and in the radio at 43GHz, 37 GHz, and 15 GHz from the VLBA, Metsähovi, and OVRO radio telescopes - along with optical polarisation measurements from the KVA and Liverpool telescopes. We examined the corresponding light curves and broadband spectral energy distribution and we compared the multifrequency properties of 3C 279 at the epoch of the MAGIC observations with those inferred from historical observations. Results. During the MAGIC observations (2011 February 8 to April 11) 3C 279 was in a low state in optical, X-ray, and gamma-rays. The MAGIC observations did not yield a significant detection. The derived upper limits are in agreement with the extrapolation of the HE gamma-ray spectrum, corrected for EBL absorption, from Fermi–LAT. The second part of the MAGIC observations in 2011 was triggered by a high-activity state in the optical and gamma-ray bands. During the optical outburst the optical electric vector position angle (EVPA) showed a rotation of ∼ 180◦. Unlike previous cases, there was no simultaneous rotation of the 43 GHz radio polarisation angle. No VHE gamma-rays were detected by MAGIC, and the derived upper limits suggest the presence of a spectral break or curvature between the Fermi–LAT and MAGIC bands. The combined upper limits are the strongest derived to date for the source at VHE and below the level of the previously detected flux by a factor of ∼ 2. Radiation models that include synchrotron and inverse Compton emissions match the optical to gamma-ray data, assuming an emission component inside the broad line region with size R = 1.1 × 10^(16) cm and magnetic field B = 1.45G responsible for the high-energy emission, and another one outside the broad line region and the infrared torus (R = 1.5 × 10^(17) cm and B = 0.8G) causing the optical and low-energy emission. We also study the optical polarisation in detail and interpret it with a bent trajectory model.EDP ScienciesUniversidad Complutense de Madrid20142014-07-0120142014-07-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/33894reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/338942026-06-02T12:44:21Z |
| dc.title.none.fl_str_mv |
MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011 |
| title |
MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011 |
| spellingShingle |
MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011 Antoranz Canales, Pedro 537 539.1 Active galactic nuclei Large-area telescope Gamma-ray emission PKS 1510-089 Multiwavelength observations Relativistic jet Blazar 3C-279 Inner jet X-ray Variability. Electricidad Electrónica (Física) Física nuclear 2202.03 Electricidad 2207 Física Atómica y Nuclear |
| title_short |
MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011 |
| title_full |
MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011 |
| title_fullStr |
MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011 |
| title_full_unstemmed |
MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011 |
| title_sort |
MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011 |
| 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 Satalecka, Konstanzja 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 Satalecka, Konstanzja 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 Satalecka, Konstanzja 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 Active galactic nuclei Large-area telescope Gamma-ray emission PKS 1510-089 Multiwavelength observations Relativistic jet Blazar 3C-279 Inner jet X-ray Variability. Electricidad Electrónica (Física) Física nuclear 2202.03 Electricidad 2207 Física Atómica y Nuclear |
| topic |
537 539.1 Active galactic nuclei Large-area telescope Gamma-ray emission PKS 1510-089 Multiwavelength observations Relativistic jet Blazar 3C-279 Inner jet X-ray Variability. Electricidad Electrónica (Física) Física nuclear 2202.03 Electricidad 2207 Física Atómica y Nuclear |
| description |
Aims. We study the multifrequency emission and spectral properties of the quasar 3C 279 aimed at identifying the radiation processes taking place in the source. Methods. We observed 3C 279 in very-high-energy (VHE, E > 100GeV) gamma-rays, with the MAGIC telescopes during 2011, for the first time in stereoscopic mode. We combined these measurements with observations at other energy bands: in high-energy (HE, E > 100MeV) gamma-rays from Fermi–LAT; in X-rays from RXTE; in the optical from the KVA telescope; and in the radio at 43GHz, 37 GHz, and 15 GHz from the VLBA, Metsähovi, and OVRO radio telescopes - along with optical polarisation measurements from the KVA and Liverpool telescopes. We examined the corresponding light curves and broadband spectral energy distribution and we compared the multifrequency properties of 3C 279 at the epoch of the MAGIC observations with those inferred from historical observations. Results. During the MAGIC observations (2011 February 8 to April 11) 3C 279 was in a low state in optical, X-ray, and gamma-rays. The MAGIC observations did not yield a significant detection. The derived upper limits are in agreement with the extrapolation of the HE gamma-ray spectrum, corrected for EBL absorption, from Fermi–LAT. The second part of the MAGIC observations in 2011 was triggered by a high-activity state in the optical and gamma-ray bands. During the optical outburst the optical electric vector position angle (EVPA) showed a rotation of ∼ 180◦. Unlike previous cases, there was no simultaneous rotation of the 43 GHz radio polarisation angle. No VHE gamma-rays were detected by MAGIC, and the derived upper limits suggest the presence of a spectral break or curvature between the Fermi–LAT and MAGIC bands. The combined upper limits are the strongest derived to date for the source at VHE and below the level of the previously detected flux by a factor of ∼ 2. Radiation models that include synchrotron and inverse Compton emissions match the optical to gamma-ray data, assuming an emission component inside the broad line region with size R = 1.1 × 10^(16) cm and magnetic field B = 1.45G responsible for the high-energy emission, and another one outside the broad line region and the infrared torus (R = 1.5 × 10^(17) cm and B = 0.8G) causing the optical and low-energy emission. We also study the optical polarisation in detail and interpret it with a bent trajectory model. |
| publishDate |
2014 |
| dc.date.none.fl_str_mv |
2014 2014-07-01 2014 2014-07-01 |
| 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/20.500.14352/33894 |
| url |
https://hdl.handle.net/20.500.14352/33894 |
| 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 |
EDP Sciencies |
| publisher.none.fl_str_mv |
EDP Sciencies |
| dc.source.none.fl_str_mv |
reponame:Docta Complutense instname:Universidad Complutense de Madrid (UCM) |
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Universidad Complutense de Madrid (UCM) |
| reponame_str |
Docta Complutense |
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Docta Complutense |
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1869406294836772864 |
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15,300719 |