MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength context
We present a study of the very high-energy (VHE; E> 100 GeV) γ-ray emission of the blazar PKS 1424+240 observed with the MAGIC telescopes. The primary aim of this paper is the multiwavelength spectral characterization and modeling of this blazar, which is made particularly interesting by the rece...
| Autores: | , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/58583 |
| Acceso en línea: | https://hdl.handle.net/2445/58583 |
| Access Level: | acceso abierto |
| Palabra clave: | Raigs gamma Astrofísica Nucli galàctic actiu Telescopis Gamma rays Astrophysics Active galactic nuclei Telescopes |
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MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength contextMAGIC CollaborationMarcote Martin, BenitoMunar i Adrover, PereParedes i Poy, Josep MariaParedes Fortuny, XavierRibó Gomis, MarcZanin, RobertaRaigs gammaAstrofísicaNucli galàctic actiuTelescopisGamma raysAstrophysicsActive galactic nucleiTelescopesWe present a study of the very high-energy (VHE; E> 100 GeV) γ-ray emission of the blazar PKS 1424+240 observed with the MAGIC telescopes. The primary aim of this paper is the multiwavelength spectral characterization and modeling of this blazar, which is made particularly interesting by the recent discovery of a lower limit of its redshift of z ≥ 0.6 and makes it a promising candidate to be the most distant VHE source. Methods: The source has been observed with the MAGIC telescopes in VHE γ rays for a total observation time of ~33.6 h from 2009 to 2011. A detailed analysis of its γ-ray spectrum and time evolution has been carried out. Moreover, we have collected and analyzed simultaneous and quasi-simultaneous multiwavelength data. Results: The source was marginally detected in VHE γ rays during 2009 and 2010, and later, the detection was confirmed during an optical outburst in 2011. The combined significance of the stacked sample is ~7.2σ. The differential spectra measured during the different campaigns can be described by steep power laws with the indices ranging from 3.5 ± 1.2 to 5.0 ± 1.7. The MAGIC spectra corrected for the absorption due to the extragalactic background light connect smoothly, within systematic errors, with the mean spectrum in 2009-2011 observed at lower energies by the Fermi-LAT. The absorption-corrected MAGIC spectrum is flat with no apparent turn down up to 400 GeV. The multiwavelength light curve shows increasing flux in radio and optical bands that could point to a common origin from the same region of the jet. The large separation between the two peaks of the constructed non-simultaneous spectral energy distribution also requires an extremely high Doppler factor if an one zone synchrotron self-Compton model is applied. We find that a two-component synchrotron self-Compton model describes the spectral energy distribution of the source well, if the source is located at z ~ 0.6.Springer Verlag2014201420142014info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion15 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/58583Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: http://dx.doi.org/10.1051/0004-6361/201423364Astronomy and Astrophysics, 2014, vol. 567, num. A135, p. 1-15http://dx.doi.org/10.1051/0004-6361/201423364(c) Springer Verlag, 2014info:eu-repo/semantics/openAccessoai:recercat.cat:2445/585832026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength context |
| title |
MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength context |
| spellingShingle |
MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength context MAGIC Collaboration Raigs gamma Astrofísica Nucli galàctic actiu Telescopis Gamma rays Astrophysics Active galactic nuclei Telescopes |
| title_short |
MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength context |
| title_full |
MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength context |
| title_fullStr |
MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength context |
| title_full_unstemmed |
MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength context |
| title_sort |
MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength context |
| dc.creator.none.fl_str_mv |
MAGIC Collaboration Marcote Martin, Benito Munar i Adrover, Pere Paredes i Poy, Josep Maria Paredes Fortuny, Xavier Ribó Gomis, Marc Zanin, Roberta |
| author |
MAGIC Collaboration |
| author_facet |
MAGIC Collaboration Marcote Martin, Benito Munar i Adrover, Pere Paredes i Poy, Josep Maria Paredes Fortuny, Xavier Ribó Gomis, Marc Zanin, Roberta |
| author_role |
author |
| author2 |
Marcote Martin, Benito Munar i Adrover, Pere Paredes i Poy, Josep Maria Paredes Fortuny, Xavier Ribó Gomis, Marc Zanin, Roberta |
| author2_role |
author author author author author author |
| dc.subject.none.fl_str_mv |
Raigs gamma Astrofísica Nucli galàctic actiu Telescopis Gamma rays Astrophysics Active galactic nuclei Telescopes |
| topic |
Raigs gamma Astrofísica Nucli galàctic actiu Telescopis Gamma rays Astrophysics Active galactic nuclei Telescopes |
| description |
We present a study of the very high-energy (VHE; E> 100 GeV) γ-ray emission of the blazar PKS 1424+240 observed with the MAGIC telescopes. The primary aim of this paper is the multiwavelength spectral characterization and modeling of this blazar, which is made particularly interesting by the recent discovery of a lower limit of its redshift of z ≥ 0.6 and makes it a promising candidate to be the most distant VHE source. Methods: The source has been observed with the MAGIC telescopes in VHE γ rays for a total observation time of ~33.6 h from 2009 to 2011. A detailed analysis of its γ-ray spectrum and time evolution has been carried out. Moreover, we have collected and analyzed simultaneous and quasi-simultaneous multiwavelength data. Results: The source was marginally detected in VHE γ rays during 2009 and 2010, and later, the detection was confirmed during an optical outburst in 2011. The combined significance of the stacked sample is ~7.2σ. The differential spectra measured during the different campaigns can be described by steep power laws with the indices ranging from 3.5 ± 1.2 to 5.0 ± 1.7. The MAGIC spectra corrected for the absorption due to the extragalactic background light connect smoothly, within systematic errors, with the mean spectrum in 2009-2011 observed at lower energies by the Fermi-LAT. The absorption-corrected MAGIC spectrum is flat with no apparent turn down up to 400 GeV. The multiwavelength light curve shows increasing flux in radio and optical bands that could point to a common origin from the same region of the jet. The large separation between the two peaks of the constructed non-simultaneous spectral energy distribution also requires an extremely high Doppler factor if an one zone synchrotron self-Compton model is applied. We find that a two-component synchrotron self-Compton model describes the spectral energy distribution of the source well, if the source is located at z ~ 0.6. |
| publishDate |
2014 |
| dc.date.none.fl_str_mv |
2014 2014 2014 2014 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion |
| format |
article |
| status_str |
acceptedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/58583 |
| url |
https://hdl.handle.net/2445/58583 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Versió postprint del document publicat a: http://dx.doi.org/10.1051/0004-6361/201423364 Astronomy and Astrophysics, 2014, vol. 567, num. A135, p. 1-15 http://dx.doi.org/10.1051/0004-6361/201423364 |
| dc.rights.none.fl_str_mv |
(c) Springer Verlag, 2014 info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
(c) Springer Verlag, 2014 |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
15 p. application/pdf application/pdf |
| dc.publisher.none.fl_str_mv |
Springer Verlag |
| publisher.none.fl_str_mv |
Springer Verlag |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Física Quàntica i Astrofísica) reponame:Recercat. Dipósit de la Recerca de Catalunya instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| reponame_str |
Recercat. Dipósit de la Recerca de Catalunya |
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Recercat. Dipósit de la Recerca de Catalunya |
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