Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalog

Autores
Benaglia, Paula; Ishwara Chandra, C.H.; Intema, H.; Colazo, Marcelo Eduardo Antonio; Gaikwad, M.
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. Observations at the radio continuum band below the gigahertz band are key when the nature and properties of nonthermal sources are investigated because their radio radiation is strongest at these frequencies. The low radio frequency range is therefore the best to spot possible counterparts to very high-energy (VHE) sources: relativistic particles of the same population are likely to be involved in radio and high-energy radiation processes. Some of these counterparts to VHE sources can be stellar sources. Aims. The Cygnus region in the northern sky is one of the richest in this type of sources that are potential counterparts to VHE sources. We surveyed the central ∼15 sq deg of the Cygnus constellation at the 325 and 610 MHz bands with angular resolutions and sensitivities of 10″ and 6″, and 0.5 and 0.2 mJy beam-1, respectively. Methods. The data were collected during 172 h in 2013-2017, using the Giant Metrewave Radio Telescope with 32 MHz bandwidth, and were calibrated using the SPAM routines. The source extraction was carried out with the PyBDSF tool, followed by verification through visual inspection of every putative catalog candidate source in order to determine its reliability. Results. In this first paper we present the catalog of sources, consisting of 1048 sources at 325 MHz and 2796 sources at 610 MHz. By cross-matching the sources from both frequencies with the objects of the SIMBAD database, we found possible counterparts for 143 of them. Most of the sources from the 325-MHz catalog (993) were detected at the 610 MHz band, and their spectral index α was computed adopting S(ν) να. The maximum of the spectral index distribution is at α = -1, which is characteristic of nonthermal emitters and might indicate an extragalactic population.
Fil: Benaglia, Paula. 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. Universidad Nacional de La Plata; Argentina
Fil: Ishwara Chandra, C.H.. National Centre For Radio Astrophysics India; India
Fil: Intema, H.. Curtin University; Australia. Leiden Observatory Research Institute; Países Bajos
Fil: Colazo, Marcelo Eduardo Antonio. Comision Nacional de Actividades Espaciales; Argentina
Fil: Gaikwad, M.. Max Planck Institute For Radio Astronomy; Alemania
Materia
CATALOGS
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB2
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB8
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB9
RADIO CONTINUUM: GENERAL
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/131123

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network_name_str CONICET Digital (CONICET)
spelling Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalogBenaglia, PaulaIshwara Chandra, C.H.Intema, H.Colazo, Marcelo Eduardo AntonioGaikwad, M.CATALOGSOPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB2OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB8OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB9RADIO CONTINUUM: GENERALhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. Observations at the radio continuum band below the gigahertz band are key when the nature and properties of nonthermal sources are investigated because their radio radiation is strongest at these frequencies. The low radio frequency range is therefore the best to spot possible counterparts to very high-energy (VHE) sources: relativistic particles of the same population are likely to be involved in radio and high-energy radiation processes. Some of these counterparts to VHE sources can be stellar sources. Aims. The Cygnus region in the northern sky is one of the richest in this type of sources that are potential counterparts to VHE sources. We surveyed the central ∼15 sq deg of the Cygnus constellation at the 325 and 610 MHz bands with angular resolutions and sensitivities of 10″ and 6″, and 0.5 and 0.2 mJy beam-1, respectively. Methods. The data were collected during 172 h in 2013-2017, using the Giant Metrewave Radio Telescope with 32 MHz bandwidth, and were calibrated using the SPAM routines. The source extraction was carried out with the PyBDSF tool, followed by verification through visual inspection of every putative catalog candidate source in order to determine its reliability. Results. In this first paper we present the catalog of sources, consisting of 1048 sources at 325 MHz and 2796 sources at 610 MHz. By cross-matching the sources from both frequencies with the objects of the SIMBAD database, we found possible counterparts for 143 of them. Most of the sources from the 325-MHz catalog (993) were detected at the 610 MHz band, and their spectral index α was computed adopting S(ν) να. The maximum of the spectral index distribution is at α = -1, which is characteristic of nonthermal emitters and might indicate an extragalactic population.Fil: Benaglia, Paula. 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. Universidad Nacional de La Plata; ArgentinaFil: Ishwara Chandra, C.H.. National Centre For Radio Astrophysics India; IndiaFil: Intema, H.. Curtin University; Australia. Leiden Observatory Research Institute; Países BajosFil: Colazo, Marcelo Eduardo Antonio. Comision Nacional de Actividades Espaciales; ArgentinaFil: Gaikwad, M.. Max Planck Institute For Radio Astronomy; AlemaniaEDP Sciences2020-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/131123Benaglia, Paula; Ishwara Chandra, C.H.; Intema, H.; Colazo, Marcelo Eduardo Antonio; Gaikwad, M.; Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalog; EDP Sciences; Astronomy and Astrophysics; 642; 10-2020; A1360004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202037916info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2020/10/aa37916-20/aa37916-20.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:50:17Zoai:ri.conicet.gov.ar:11336/131123instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:50:18.203CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalog
title Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalog
spellingShingle Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalog
Benaglia, Paula
CATALOGS
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB2
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB8
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB9
RADIO CONTINUUM: GENERAL
title_short Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalog
title_full Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalog
title_fullStr Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalog
title_full_unstemmed Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalog
title_sort Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalog
dc.creator.none.fl_str_mv Benaglia, Paula
Ishwara Chandra, C.H.
Intema, H.
Colazo, Marcelo Eduardo Antonio
Gaikwad, M.
author Benaglia, Paula
author_facet Benaglia, Paula
Ishwara Chandra, C.H.
Intema, H.
Colazo, Marcelo Eduardo Antonio
Gaikwad, M.
author_role author
author2 Ishwara Chandra, C.H.
Intema, H.
Colazo, Marcelo Eduardo Antonio
Gaikwad, M.
author2_role author
author
author
author
dc.subject.none.fl_str_mv CATALOGS
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB2
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB8
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB9
RADIO CONTINUUM: GENERAL
topic CATALOGS
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB2
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB8
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: CYG OB9
RADIO CONTINUUM: GENERAL
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. Observations at the radio continuum band below the gigahertz band are key when the nature and properties of nonthermal sources are investigated because their radio radiation is strongest at these frequencies. The low radio frequency range is therefore the best to spot possible counterparts to very high-energy (VHE) sources: relativistic particles of the same population are likely to be involved in radio and high-energy radiation processes. Some of these counterparts to VHE sources can be stellar sources. Aims. The Cygnus region in the northern sky is one of the richest in this type of sources that are potential counterparts to VHE sources. We surveyed the central ∼15 sq deg of the Cygnus constellation at the 325 and 610 MHz bands with angular resolutions and sensitivities of 10″ and 6″, and 0.5 and 0.2 mJy beam-1, respectively. Methods. The data were collected during 172 h in 2013-2017, using the Giant Metrewave Radio Telescope with 32 MHz bandwidth, and were calibrated using the SPAM routines. The source extraction was carried out with the PyBDSF tool, followed by verification through visual inspection of every putative catalog candidate source in order to determine its reliability. Results. In this first paper we present the catalog of sources, consisting of 1048 sources at 325 MHz and 2796 sources at 610 MHz. By cross-matching the sources from both frequencies with the objects of the SIMBAD database, we found possible counterparts for 143 of them. Most of the sources from the 325-MHz catalog (993) were detected at the 610 MHz band, and their spectral index α was computed adopting S(ν) να. The maximum of the spectral index distribution is at α = -1, which is characteristic of nonthermal emitters and might indicate an extragalactic population.
Fil: Benaglia, Paula. 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. Universidad Nacional de La Plata; Argentina
Fil: Ishwara Chandra, C.H.. National Centre For Radio Astrophysics India; India
Fil: Intema, H.. Curtin University; Australia. Leiden Observatory Research Institute; Países Bajos
Fil: Colazo, Marcelo Eduardo Antonio. Comision Nacional de Actividades Espaciales; Argentina
Fil: Gaikwad, M.. Max Planck Institute For Radio Astronomy; Alemania
description Context. Observations at the radio continuum band below the gigahertz band are key when the nature and properties of nonthermal sources are investigated because their radio radiation is strongest at these frequencies. The low radio frequency range is therefore the best to spot possible counterparts to very high-energy (VHE) sources: relativistic particles of the same population are likely to be involved in radio and high-energy radiation processes. Some of these counterparts to VHE sources can be stellar sources. Aims. The Cygnus region in the northern sky is one of the richest in this type of sources that are potential counterparts to VHE sources. We surveyed the central ∼15 sq deg of the Cygnus constellation at the 325 and 610 MHz bands with angular resolutions and sensitivities of 10″ and 6″, and 0.5 and 0.2 mJy beam-1, respectively. Methods. The data were collected during 172 h in 2013-2017, using the Giant Metrewave Radio Telescope with 32 MHz bandwidth, and were calibrated using the SPAM routines. The source extraction was carried out with the PyBDSF tool, followed by verification through visual inspection of every putative catalog candidate source in order to determine its reliability. Results. In this first paper we present the catalog of sources, consisting of 1048 sources at 325 MHz and 2796 sources at 610 MHz. By cross-matching the sources from both frequencies with the objects of the SIMBAD database, we found possible counterparts for 143 of them. Most of the sources from the 325-MHz catalog (993) were detected at the 610 MHz band, and their spectral index α was computed adopting S(ν) να. The maximum of the spectral index distribution is at α = -1, which is characteristic of nonthermal emitters and might indicate an extragalactic population.
publishDate 2020
dc.date.none.fl_str_mv 2020-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/131123
Benaglia, Paula; Ishwara Chandra, C.H.; Intema, H.; Colazo, Marcelo Eduardo Antonio; Gaikwad, M.; Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalog; EDP Sciences; Astronomy and Astrophysics; 642; 10-2020; A136
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/131123
identifier_str_mv Benaglia, Paula; Ishwara Chandra, C.H.; Intema, H.; Colazo, Marcelo Eduardo Antonio; Gaikwad, M.; Cygnus survey with the Giant Metrewave Radio Telescope at 325 and 610 MHz: The catalog; EDP Sciences; Astronomy and Astrophysics; 642; 10-2020; A136
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202037916
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2020/10/aa37916-20/aa37916-20.html
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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