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dc.contributor.author
Paredes, Josep Maria
dc.contributor.author
Marti, Josep
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Ishwara Chandra, C. H.
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Torres, Diego F.
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Romero, Gustavo Esteban
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Combi, Jorge Ariel
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Bosch Ramon, Valentí
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Muñoz Arjonilla, Álvaro José
dc.contributor.author
Sánchez Sutil, Juan R.
dc.date.available
2017-12-01T17:23:08Z
dc.date.issued
2008-12
dc.identifier.citation
Paredes, Josep Maria; Marti, Josep; Ishwara Chandra, C. H.; Torres, Diego F.; Romero, Gustavo Esteban; et al.; Radio detections towards unidentified variable EGRET sources; EDP Sciences; Astronomy and Astrophysics; 482; 12-2008; 247-253
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/29458
dc.description.abstract
Context. A considerable fraction of the gamma-ray sources discovered with the Energetic Gamma-Ray Experiment Telescope (EGRET) remain unidentified. The EGRET sources that have been properly identified are either pulsars or variable sources at both radio and gamma-ray wavelengths. Most of the variable sources are strong radio blazars.However, some low galactic-latitude EGRET sources, with highly variable gamma-ray emission, lack any evident counterpart according to the radio data available until now. Aims. The primary goal of this paper is to identify and characterise the potential radio counterparts of four highly variable gamma-ray sources in the galactic plane through mapping the radio surroundings of the EGRET confidence contours and determining the variable radio sources in the field whenever possible. Methods. We have carried out a radio exploration of the fields of the selected EGRET sources using the Giant Metrewave Radio Telescope (GMRT) interferometer at 21 cm wavelength, with pointings being separated by months. Results. We detected a total of 151 radio sources. Among them, we identified a few radio sources whose flux density has apparently changed on timescales of months. Despite the limitations of our search, their possible variability makes these objects a top-priority target for multiwavelength studies of the potential counterparts of highly variable, unidentified gamma-ray sources.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Radio Continuum
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Gamma Rays
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X Ray Binaries
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Radio detections towards unidentified variable EGRET sources
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-10-12T19:39:03Z
dc.journal.volume
482
dc.journal.pagination
247-253
dc.journal.pais
Francia
dc.journal.ciudad
Les Ulis Cedex A
dc.description.fil
Fil: Paredes, Josep Maria. Universidad de Barcelona; España
dc.description.fil
Fil: Marti, Josep. Universidad de Jaén; España
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Fil: Ishwara Chandra, C. H.. National Centre for Radio Astrophysics; India
dc.description.fil
Fil: Torres, Diego F.. Universitat Autònoma de Barcelona; España
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Fil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
dc.description.fil
Fil: Combi, Jorge Ariel. Universidad de Jaén; España
dc.description.fil
Fil: Bosch Ramon, Valentí. Max Planck Institut f¨ur Kernphysik; Alemania
dc.description.fil
Fil: Muñoz Arjonilla, Álvaro José. Universidad de Jaén; España
dc.description.fil
Fil: Sánchez Sutil, Juan R.. Universidad de Jaén; España
dc.journal.title
Astronomy and Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361:20078299
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2008/16/aa8299-07/aa8299-07.html
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