INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars
- Autores
- De Becker, M.; Rauw, G.; Pittard, J. M.; Sana, H.; Stevens, I. R.; Romero, Gisela Andrea
- Año de publicación
- 2007
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Aims. We analyze INTEGRAL-ISGRI data in order to probe the hard X-ray emission (above 20 keV) from point sources in the Cyg OB2 region and to investigate the putative non-thermal high-energy emission from early-type stars (Wolf-Rayet and O-type stars). Among the targets located in the field of view, we focus on the still unidentified EGRET source 3EG 2033+4118 that may be related to massive stars known to produce non-thermal emission in the radio domain, and on the wide colliding-wind binary WR 140. Methods. Using a large set of data obtained with the IBIS-ISGRI imager onboard INTEGRAL, we run the OSA software package in order to find point sources in the fully coded field of view of the instrument. Results. Our data do not allow the detection of a lower-energy counterpart of 3EG J2033+4118 nor of any other new point sources in the field of view, and we derive upper limits on the high-energy flux for a few targets: 3EG J2033+4118, TeV J2032+4130, WR 140, WR 146 and WR 147. The results are discussed in the context of the multiwavelength investigation of these objects. Conclusions. The upper limits derived are valuable constraints for models aimed at understanding the acceleration of particles in non-thermal emitting massive stars, and of the still unidentified very-high gamma-ray source TeV J2032+4130.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
Acceleration of particles
Gamma rays: observations
Radiation mechanisms: non-thermal
Stars: early-type
X-rays: stars - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/83012
Ver los metadatos del registro completo
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INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive starsDe Becker, M.Rauw, G.Pittard, J. M.Sana, H.Stevens, I. R.Romero, Gisela AndreaCiencias AstronómicasAcceleration of particlesGamma rays: observationsRadiation mechanisms: non-thermalStars: early-typeX-rays: starsAims. We analyze INTEGRAL-ISGRI data in order to probe the hard X-ray emission (above 20 keV) from point sources in the Cyg OB2 region and to investigate the putative non-thermal high-energy emission from early-type stars (Wolf-Rayet and O-type stars). Among the targets located in the field of view, we focus on the still unidentified EGRET source 3EG 2033+4118 that may be related to massive stars known to produce non-thermal emission in the radio domain, and on the wide colliding-wind binary WR 140. Methods. Using a large set of data obtained with the IBIS-ISGRI imager onboard INTEGRAL, we run the OSA software package in order to find point sources in the fully coded field of view of the instrument. Results. Our data do not allow the detection of a lower-energy counterpart of 3EG J2033+4118 nor of any other new point sources in the field of view, and we derive upper limits on the high-energy flux for a few targets: 3EG J2033+4118, TeV J2032+4130, WR 140, WR 146 and WR 147. The results are discussed in the context of the multiwavelength investigation of these objects. Conclusions. The upper limits derived are valuable constraints for models aimed at understanding the acceleration of particles in non-thermal emitting massive stars, and of the still unidentified very-high gamma-ray source TeV J2032+4130.Facultad de Ciencias Astronómicas y Geofísicas2007info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf905-910http://sedici.unlp.edu.ar/handle/10915/83012enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20077734info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:15:41Zoai:sedici.unlp.edu.ar:10915/83012Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:42.122SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars |
title |
INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars |
spellingShingle |
INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars De Becker, M. Ciencias Astronómicas Acceleration of particles Gamma rays: observations Radiation mechanisms: non-thermal Stars: early-type X-rays: stars |
title_short |
INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars |
title_full |
INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars |
title_fullStr |
INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars |
title_full_unstemmed |
INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars |
title_sort |
INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars |
dc.creator.none.fl_str_mv |
De Becker, M. Rauw, G. Pittard, J. M. Sana, H. Stevens, I. R. Romero, Gisela Andrea |
author |
De Becker, M. |
author_facet |
De Becker, M. Rauw, G. Pittard, J. M. Sana, H. Stevens, I. R. Romero, Gisela Andrea |
author_role |
author |
author2 |
Rauw, G. Pittard, J. M. Sana, H. Stevens, I. R. Romero, Gisela Andrea |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Ciencias Astronómicas Acceleration of particles Gamma rays: observations Radiation mechanisms: non-thermal Stars: early-type X-rays: stars |
topic |
Ciencias Astronómicas Acceleration of particles Gamma rays: observations Radiation mechanisms: non-thermal Stars: early-type X-rays: stars |
dc.description.none.fl_txt_mv |
Aims. We analyze INTEGRAL-ISGRI data in order to probe the hard X-ray emission (above 20 keV) from point sources in the Cyg OB2 region and to investigate the putative non-thermal high-energy emission from early-type stars (Wolf-Rayet and O-type stars). Among the targets located in the field of view, we focus on the still unidentified EGRET source 3EG 2033+4118 that may be related to massive stars known to produce non-thermal emission in the radio domain, and on the wide colliding-wind binary WR 140. Methods. Using a large set of data obtained with the IBIS-ISGRI imager onboard INTEGRAL, we run the OSA software package in order to find point sources in the fully coded field of view of the instrument. Results. Our data do not allow the detection of a lower-energy counterpart of 3EG J2033+4118 nor of any other new point sources in the field of view, and we derive upper limits on the high-energy flux for a few targets: 3EG J2033+4118, TeV J2032+4130, WR 140, WR 146 and WR 147. The results are discussed in the context of the multiwavelength investigation of these objects. Conclusions. The upper limits derived are valuable constraints for models aimed at understanding the acceleration of particles in non-thermal emitting massive stars, and of the still unidentified very-high gamma-ray source TeV J2032+4130. Facultad de Ciencias Astronómicas y Geofísicas |
description |
Aims. We analyze INTEGRAL-ISGRI data in order to probe the hard X-ray emission (above 20 keV) from point sources in the Cyg OB2 region and to investigate the putative non-thermal high-energy emission from early-type stars (Wolf-Rayet and O-type stars). Among the targets located in the field of view, we focus on the still unidentified EGRET source 3EG 2033+4118 that may be related to massive stars known to produce non-thermal emission in the radio domain, and on the wide colliding-wind binary WR 140. Methods. Using a large set of data obtained with the IBIS-ISGRI imager onboard INTEGRAL, we run the OSA software package in order to find point sources in the fully coded field of view of the instrument. Results. Our data do not allow the detection of a lower-energy counterpart of 3EG J2033+4118 nor of any other new point sources in the field of view, and we derive upper limits on the high-energy flux for a few targets: 3EG J2033+4118, TeV J2032+4130, WR 140, WR 146 and WR 147. The results are discussed in the context of the multiwavelength investigation of these objects. Conclusions. The upper limits derived are valuable constraints for models aimed at understanding the acceleration of particles in non-thermal emitting massive stars, and of the still unidentified very-high gamma-ray source TeV J2032+4130. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/83012 |
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http://sedici.unlp.edu.ar/handle/10915/83012 |
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eng |
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eng |
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info:eu-repo/semantics/altIdentifier/issn/0004-6361 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20077734 |
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