Optical spectroscopic and photometric observations of unclassified Active Galactic Nuclei in the Fermi-2LAC catalogue

Autores
Klindt, Lizelke; Van Soelen, Brian; Meintjes, Pieter; Väisänen, Petri; Kniazev, Alexei
Año de publicación
2015
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The Fermi-LAT 2-year Source catalogue (2LAC) contains approximately 157 sources which are classified as AGN of unknown type (AGU) with no determined redshifts. We have identified a subset of these AGUsfor follow-up studies aiming to classify them and determine redshifts, utilizing South African observatories. Optical spectroscopic observations have been performed with the Southern African Large Telescope (SALT) and short term photometric variability of the sources was studied using the SAAO 1.9-m telescope. The results for five candidates are discussed. The spectra are mainly featureless as expected for BL Lacs, however, potential spectral features are present for some sources. Similarly, photometric monitoring shows potential variability, for certain sources.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Fermi-2LAC catalogue
AGN of unknown type
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/168106
Acceder
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network_name_str SEDICI (UNLP)
spelling Optical spectroscopic and photometric observations of unclassified Active Galactic Nuclei in the Fermi-2LAC catalogueKlindt, LizelkeVan Soelen, BrianMeintjes, PieterVäisänen, PetriKniazev, AlexeiCiencias AstronómicasFermi-2LAC catalogueAGN of unknown typeThe Fermi-LAT 2-year Source catalogue (2LAC) contains approximately 157 sources which are classified as AGN of unknown type (AGU) with no determined redshifts. We have identified a subset of these AGUsfor follow-up studies aiming to classify them and determine redshifts, utilizing South African observatories. Optical spectroscopic observations have been performed with the Southern African Large Telescope (SALT) and short term photometric variability of the sources was studied using the SAAO 1.9-m telescope. The results for five candidates are discussed. The spectra are mainly featureless as expected for BL Lacs, however, potential spectral features are present for some sources. Similarly, photometric monitoring shows potential variability, for certain sources.Facultad de Ciencias Astronómicas y Geofísicas2015-10info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionObjeto de conferenciahttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdf149-152http://sedici.unlp.edu.ar/handle/10915/168106enginfo:eu-repo/semantics/altIdentifier/isbn/978-987-24948-3-4info:eu-repo/semantics/reference/url/https://sedici.unlp.edu.ar/handle/10915/167830info: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:UNLP2025-09-29T11:44:50Zoai:sedici.unlp.edu.ar:10915/168106Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:44:50.978SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Optical spectroscopic and photometric observations of unclassified Active Galactic Nuclei in the Fermi-2LAC catalogue
title Optical spectroscopic and photometric observations of unclassified Active Galactic Nuclei in the Fermi-2LAC catalogue
spellingShingle Optical spectroscopic and photometric observations of unclassified Active Galactic Nuclei in the Fermi-2LAC catalogue
Klindt, Lizelke
Ciencias Astronómicas
Fermi-2LAC catalogue
AGN of unknown type
title_short Optical spectroscopic and photometric observations of unclassified Active Galactic Nuclei in the Fermi-2LAC catalogue
title_full Optical spectroscopic and photometric observations of unclassified Active Galactic Nuclei in the Fermi-2LAC catalogue
title_fullStr Optical spectroscopic and photometric observations of unclassified Active Galactic Nuclei in the Fermi-2LAC catalogue
title_full_unstemmed Optical spectroscopic and photometric observations of unclassified Active Galactic Nuclei in the Fermi-2LAC catalogue
title_sort Optical spectroscopic and photometric observations of unclassified Active Galactic Nuclei in the Fermi-2LAC catalogue
dc.creator.none.fl_str_mv Klindt, Lizelke
Van Soelen, Brian
Meintjes, Pieter
Väisänen, Petri
Kniazev, Alexei
author Klindt, Lizelke
author_facet Klindt, Lizelke
Van Soelen, Brian
Meintjes, Pieter
Väisänen, Petri
Kniazev, Alexei
author_role author
author2 Van Soelen, Brian
Meintjes, Pieter
Väisänen, Petri
Kniazev, Alexei
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Fermi-2LAC catalogue
AGN of unknown type
topic Ciencias Astronómicas
Fermi-2LAC catalogue
AGN of unknown type
dc.description.none.fl_txt_mv The Fermi-LAT 2-year Source catalogue (2LAC) contains approximately 157 sources which are classified as AGN of unknown type (AGU) with no determined redshifts. We have identified a subset of these AGUsfor follow-up studies aiming to classify them and determine redshifts, utilizing South African observatories. Optical spectroscopic observations have been performed with the Southern African Large Telescope (SALT) and short term photometric variability of the sources was studied using the SAAO 1.9-m telescope. The results for five candidates are discussed. The spectra are mainly featureless as expected for BL Lacs, however, potential spectral features are present for some sources. Similarly, photometric monitoring shows potential variability, for certain sources.
Facultad de Ciencias Astronómicas y Geofísicas
description The Fermi-LAT 2-year Source catalogue (2LAC) contains approximately 157 sources which are classified as AGN of unknown type (AGU) with no determined redshifts. We have identified a subset of these AGUsfor follow-up studies aiming to classify them and determine redshifts, utilizing South African observatories. Optical spectroscopic observations have been performed with the Southern African Large Telescope (SALT) and short term photometric variability of the sources was studied using the SAAO 1.9-m telescope. The results for five candidates are discussed. The spectra are mainly featureless as expected for BL Lacs, however, potential spectral features are present for some sources. Similarly, photometric monitoring shows potential variability, for certain sources.
publishDate 2015
dc.date.none.fl_str_mv 2015-10
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
info:eu-repo/semantics/publishedVersion
Objeto de conferencia
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
format conferenceObject
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/168106
url http://sedici.unlp.edu.ar/handle/10915/168106
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/isbn/978-987-24948-3-4
info:eu-repo/semantics/reference/url/https://sedici.unlp.edu.ar/handle/10915/167830
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
149-152
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
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instname_str Universidad Nacional de La Plata
instacron_str UNLP
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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