Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State Changes

Autores
Oknyansky, V. L.; Gaskell, C. M.; Mikailov, K. M.; Lipunov, V. M.; Shatsky, N. I.; Tsygankov, S. S.; Gorbovskoy, E. S.; Tatarnikov, A. M.; Metlov, V. G.; Malanchev, K. L.; Brotherton, M. B.; Kasper, D.; Du, P.; Chen, X.; Burlak, M. A.; Buckley, D. A. H.; Rebolo, R.; Serra-Ricart, M.; Podestá, Ricardo César; Levato, Orlando Hugo
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Optical and near-infrared photometry, optical spectroscopy, and soft X-ray and UV monitoring of the changing-look active galactic nucleus NGC 2617 show that it continues to have the appearance of a type-1 Seyfert galaxy. An optical light curve for 2010-2017 indicates that the change of type probably occurred between 2010 October and 2012 February and was not related to the brightening in 2013. In 2016 and 2017 NGC 2617 brightened again to a level of activity close to that in 2013 April. However, in 2017 from the end of the March to end of July 2017 it was in very low level and starting to change back to a Seyfert 1.8. We find variations in all passbands and in both the intensities and profiles of the broad Balmer lines. A new displaced emission peak has appeared in Hβ. X-ray variations are well correlated with UV-optical variability and possibly lead by ̃2-3 d. The K band lags the J band by about 21.5 ± 2.5 d and lags the combined B + J bands by ̃25 d. J lags B by about 3 d. This could be because J-band variability arises predominantly from the outer part of the accretion disc, while K-band variability is dominated by thermal re-emission by dust. We propose that spectral-type changes are a result of increasing central luminosity causing sublimation of the innermost dust in the hollow bi-conical outflow. We briefly discuss various other possible reasons that might explain the dramatic changes in NGC 2617.
Fil: Oknyansky, V. L.. Sternberg Astronomical Institute; Rusia
Fil: Gaskell, C. M.. Department of Astronomy and Astrophysics. University of California. Santa Cruz; Estados Unidos
Fil: Mikailov, K. M.. Shamakhy Astrophysical Observatory, National Academy of Sciences. Pirkuli; Azerbaiyán
Fil: Lipunov, V. M.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University ; Rusia
Fil: Shatsky, N. I.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; Rusia
Fil: Tsygankov, S. S.. Tuorla Observatory, Department of Physics and Astronomy. University of Turku.; Finlandia
Fil: Gorbovskoy, E. S.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; Rusia
Fil: Tatarnikov, A. M.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; Rusia
Fil: Metlov, V. G.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; Rusia
Fil: Malanchev, K. L.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; Rusia
Fil: Brotherton, M.B.. University of Wyoming; Estados Unidos
Fil: Kasper, D.. University of Wyoming; Estados Unidos
Fil: Du, P.. Institute of High Energy Physics. Chinese Academy of Sciences; China
Fil: Chen, X.. School of Space Science and Physics. Shandong University; China
Fil: Burlak, M. A.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; Rusia
Fil: Buckley, D. A. H.. The South African Astronomical Observatory; Sudáfrica
Fil: Rebolo, R.. Instituto de Astrofisica de Canarias; España
Fil: Serra-Ricart, M.. Instituto de Astrofisica de Canarias; España
Fil: Podestá, R.. Universidad Nacional de San Juan; Argentina
Fil: Levato, O. H.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Materia
Agn
X-Ray
Uv
Photometry
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:11336/99644

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spelling Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State ChangesOknyansky, V. L.Gaskell, C. M.Mikailov, K. M.Lipunov, V. M.Shatsky, N. I.Tsygankov, S. S.Gorbovskoy, E. S.Tatarnikov, A. M.Metlov, V. G.Malanchev, K. L.Brotherton, M. B.Kasper, D.Du, P.Chen, X.Burlak, M. A.Buckley, D. A. H.Rebolo, R.Serra-Ricart, M.Podestá, Ricardo CésarLevato, Orlando HugoAgnX-RayUvPhotometryhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Optical and near-infrared photometry, optical spectroscopy, and soft X-ray and UV monitoring of the changing-look active galactic nucleus NGC 2617 show that it continues to have the appearance of a type-1 Seyfert galaxy. An optical light curve for 2010-2017 indicates that the change of type probably occurred between 2010 October and 2012 February and was not related to the brightening in 2013. In 2016 and 2017 NGC 2617 brightened again to a level of activity close to that in 2013 April. However, in 2017 from the end of the March to end of July 2017 it was in very low level and starting to change back to a Seyfert 1.8. We find variations in all passbands and in both the intensities and profiles of the broad Balmer lines. A new displaced emission peak has appeared in Hβ. X-ray variations are well correlated with UV-optical variability and possibly lead by ̃2-3 d. The K band lags the J band by about 21.5 ± 2.5 d and lags the combined B + J bands by ̃25 d. J lags B by about 3 d. This could be because J-band variability arises predominantly from the outer part of the accretion disc, while K-band variability is dominated by thermal re-emission by dust. We propose that spectral-type changes are a result of increasing central luminosity causing sublimation of the innermost dust in the hollow bi-conical outflow. We briefly discuss various other possible reasons that might explain the dramatic changes in NGC 2617.Fil: Oknyansky, V. L.. Sternberg Astronomical Institute; RusiaFil: Gaskell, C. M.. Department of Astronomy and Astrophysics. University of California. Santa Cruz; Estados UnidosFil: Mikailov, K. M.. Shamakhy Astrophysical Observatory, National Academy of Sciences. Pirkuli; AzerbaiyánFil: Lipunov, V. M.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University ; RusiaFil: Shatsky, N. I.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; RusiaFil: Tsygankov, S. S.. Tuorla Observatory, Department of Physics and Astronomy. University of Turku.; FinlandiaFil: Gorbovskoy, E. S.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; RusiaFil: Tatarnikov, A. M.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; RusiaFil: Metlov, V. G.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; RusiaFil: Malanchev, K. L.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; RusiaFil: Brotherton, M.B.. University of Wyoming; Estados UnidosFil: Kasper, D.. University of Wyoming; Estados UnidosFil: Du, P.. Institute of High Energy Physics. Chinese Academy of Sciences; ChinaFil: Chen, X.. School of Space Science and Physics. Shandong University; ChinaFil: Burlak, M. A.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; RusiaFil: Buckley, D. A. H.. The South African Astronomical Observatory; SudáfricaFil: Rebolo, R.. Instituto de Astrofisica de Canarias; EspañaFil: Serra-Ricart, M.. Instituto de Astrofisica de Canarias; EspañaFil: Podestá, R.. Universidad Nacional de San Juan; ArgentinaFil: Levato, O. H.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaOdessa National University2017-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/99644Oknyansky, V. L.; Gaskell, C. M.; Mikailov, K. M.; Lipunov, V. M.; Shatsky, N. I.; et al.; Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State Changes; Odessa National University; Odessa Astronomical Publications; 30; 11-2017; 117-1201810-4215CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.18524/1810-4215.2017.30.114366info:eu-repo/semantics/altIdentifier/url/http://oap.onu.edu.ua/article/view/114366info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:46:33Zoai:ri.conicet.gov.ar:11336/99644instacron: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 09:46:33.339CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State Changes
title Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State Changes
spellingShingle Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State Changes
Oknyansky, V. L.
Agn
X-Ray
Uv
Photometry
title_short Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State Changes
title_full Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State Changes
title_fullStr Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State Changes
title_full_unstemmed Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State Changes
title_sort Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State Changes
dc.creator.none.fl_str_mv Oknyansky, V. L.
Gaskell, C. M.
Mikailov, K. M.
Lipunov, V. M.
Shatsky, N. I.
Tsygankov, S. S.
Gorbovskoy, E. S.
Tatarnikov, A. M.
Metlov, V. G.
Malanchev, K. L.
Brotherton, M. B.
Kasper, D.
Du, P.
Chen, X.
Burlak, M. A.
Buckley, D. A. H.
Rebolo, R.
Serra-Ricart, M.
Podestá, Ricardo César
Levato, Orlando Hugo
author Oknyansky, V. L.
author_facet Oknyansky, V. L.
Gaskell, C. M.
Mikailov, K. M.
Lipunov, V. M.
Shatsky, N. I.
Tsygankov, S. S.
Gorbovskoy, E. S.
Tatarnikov, A. M.
Metlov, V. G.
Malanchev, K. L.
Brotherton, M. B.
Kasper, D.
Du, P.
Chen, X.
Burlak, M. A.
Buckley, D. A. H.
Rebolo, R.
Serra-Ricart, M.
Podestá, Ricardo César
Levato, Orlando Hugo
author_role author
author2 Gaskell, C. M.
Mikailov, K. M.
Lipunov, V. M.
Shatsky, N. I.
Tsygankov, S. S.
Gorbovskoy, E. S.
Tatarnikov, A. M.
Metlov, V. G.
Malanchev, K. L.
Brotherton, M. B.
Kasper, D.
Du, P.
Chen, X.
Burlak, M. A.
Buckley, D. A. H.
Rebolo, R.
Serra-Ricart, M.
Podestá, Ricardo César
Levato, Orlando Hugo
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Agn
X-Ray
Uv
Photometry
topic Agn
X-Ray
Uv
Photometry
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Optical and near-infrared photometry, optical spectroscopy, and soft X-ray and UV monitoring of the changing-look active galactic nucleus NGC 2617 show that it continues to have the appearance of a type-1 Seyfert galaxy. An optical light curve for 2010-2017 indicates that the change of type probably occurred between 2010 October and 2012 February and was not related to the brightening in 2013. In 2016 and 2017 NGC 2617 brightened again to a level of activity close to that in 2013 April. However, in 2017 from the end of the March to end of July 2017 it was in very low level and starting to change back to a Seyfert 1.8. We find variations in all passbands and in both the intensities and profiles of the broad Balmer lines. A new displaced emission peak has appeared in Hβ. X-ray variations are well correlated with UV-optical variability and possibly lead by ̃2-3 d. The K band lags the J band by about 21.5 ± 2.5 d and lags the combined B + J bands by ̃25 d. J lags B by about 3 d. This could be because J-band variability arises predominantly from the outer part of the accretion disc, while K-band variability is dominated by thermal re-emission by dust. We propose that spectral-type changes are a result of increasing central luminosity causing sublimation of the innermost dust in the hollow bi-conical outflow. We briefly discuss various other possible reasons that might explain the dramatic changes in NGC 2617.
Fil: Oknyansky, V. L.. Sternberg Astronomical Institute; Rusia
Fil: Gaskell, C. M.. Department of Astronomy and Astrophysics. University of California. Santa Cruz; Estados Unidos
Fil: Mikailov, K. M.. Shamakhy Astrophysical Observatory, National Academy of Sciences. Pirkuli; Azerbaiyán
Fil: Lipunov, V. M.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University ; Rusia
Fil: Shatsky, N. I.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; Rusia
Fil: Tsygankov, S. S.. Tuorla Observatory, Department of Physics and Astronomy. University of Turku.; Finlandia
Fil: Gorbovskoy, E. S.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; Rusia
Fil: Tatarnikov, A. M.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; Rusia
Fil: Metlov, V. G.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; Rusia
Fil: Malanchev, K. L.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; Rusia
Fil: Brotherton, M.B.. University of Wyoming; Estados Unidos
Fil: Kasper, D.. University of Wyoming; Estados Unidos
Fil: Du, P.. Institute of High Energy Physics. Chinese Academy of Sciences; China
Fil: Chen, X.. School of Space Science and Physics. Shandong University; China
Fil: Burlak, M. A.. Sternberg Astronomical Institute. M.V.Lomonosov Moscow State University; Rusia
Fil: Buckley, D. A. H.. The South African Astronomical Observatory; Sudáfrica
Fil: Rebolo, R.. Instituto de Astrofisica de Canarias; España
Fil: Serra-Ricart, M.. Instituto de Astrofisica de Canarias; España
Fil: Podestá, R.. Universidad Nacional de San Juan; Argentina
Fil: Levato, O. H.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
description Optical and near-infrared photometry, optical spectroscopy, and soft X-ray and UV monitoring of the changing-look active galactic nucleus NGC 2617 show that it continues to have the appearance of a type-1 Seyfert galaxy. An optical light curve for 2010-2017 indicates that the change of type probably occurred between 2010 October and 2012 February and was not related to the brightening in 2013. In 2016 and 2017 NGC 2617 brightened again to a level of activity close to that in 2013 April. However, in 2017 from the end of the March to end of July 2017 it was in very low level and starting to change back to a Seyfert 1.8. We find variations in all passbands and in both the intensities and profiles of the broad Balmer lines. A new displaced emission peak has appeared in Hβ. X-ray variations are well correlated with UV-optical variability and possibly lead by ̃2-3 d. The K band lags the J band by about 21.5 ± 2.5 d and lags the combined B + J bands by ̃25 d. J lags B by about 3 d. This could be because J-band variability arises predominantly from the outer part of the accretion disc, while K-band variability is dominated by thermal re-emission by dust. We propose that spectral-type changes are a result of increasing central luminosity causing sublimation of the innermost dust in the hollow bi-conical outflow. We briefly discuss various other possible reasons that might explain the dramatic changes in NGC 2617.
publishDate 2017
dc.date.none.fl_str_mv 2017-11
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/11336/99644
Oknyansky, V. L.; Gaskell, C. M.; Mikailov, K. M.; Lipunov, V. M.; Shatsky, N. I.; et al.; Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State Changes; Odessa National University; Odessa Astronomical Publications; 30; 11-2017; 117-120
1810-4215
CONICET Digital
CONICET
url http://hdl.handle.net/11336/99644
identifier_str_mv Oknyansky, V. L.; Gaskell, C. M.; Mikailov, K. M.; Lipunov, V. M.; Shatsky, N. I.; et al.; Multi-Wavelength Monitoring of the Changing-Look AGN NGC 2617 during State Changes; Odessa National University; Odessa Astronomical Publications; 30; 11-2017; 117-120
1810-4215
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.18524/1810-4215.2017.30.114366
info:eu-repo/semantics/altIdentifier/url/http://oap.onu.edu.ua/article/view/114366
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
application/pdf
dc.publisher.none.fl_str_mv Odessa National University
publisher.none.fl_str_mv Odessa National University
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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