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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/131123
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/131123 |
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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 |
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EDP Sciences |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.070432 |