Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164

Autores
Roy, Abhradeep; Gupta, Alok C.; Chitnis, Varsha R.; Cellone, Sergio Aldo; Raiteri, Claudia M.; Romero, Gustavo Esteban; Wiita, Paul J.; Chatterjee, Anshu; Combi, Jorge Ariel; Liao, Mai; Sarkar, Arkadipta; Villata, Massimo
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a long-term and intraday variability study of optical multiwaveband (U BV RI) data from the blazar AO 0235+164 collected by various telescopes for ∼44 yr (1975-2019). The blazar was found to be significantly variable over the years in all wave bands with a variation of about 6 mag between its low and active states. The variations in the different wave bands are highly correlated without any time lag. We did not observe any significant trend in color variation with time, but we observed a bluer-when-brighter trend between the B − I color index and the R magnitude. Optical BV R-band spectral energy distributions always show a convex shape. Significant intraday variability was frequently seen in the quasi-simultaneous observations of AO 0235+164 made on 22 nights in the R and V bands by the CASLEO and CAHA telescopes during 1999-2019. We also estimated a central supermassive black hole mass of 7.9 × 107 M ⊙ by analyzing the broad Mg ii emission line in AO 0235+164's spectrum. We briefly explore the probable physical scenarios responsible for the observed variability.
Fil: Roy, Abhradeep. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; España
Fil: Gupta, Alok C.. Aryabhatta Research Institute Of Observational Sciences; India. Chinese Academy of Sciences; República de China
Fil: Chitnis, Varsha R.. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; España
Fil: Cellone, Sergio Aldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "El Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico "El Leoncito". Universidad Nacional de la Plata. Complejo Astronómico "El Leoncito". Universidad Nacional de San Juan. Complejo Astronómico "El Leoncito"; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Raiteri, Claudia M.. Istituto Nazionale di Astrofisica; Italia
Fil: Romero, Gustavo Esteban. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Wiita, Paul J.. The College Of New Jersey; Estados Unidos
Fil: Chatterjee, Anshu. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; España
Fil: Combi, Jorge Ariel. Universidad de Jaén; España. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Liao, Mai. University Of Science And Technology Of China; China
Fil: Sarkar, Arkadipta. Deutsches Elektronen-synchrotron; Alemania
Fil: Villata, Massimo. Istituto Nazionale di Astrofisica; Italia
Materia
Galaxies; Active galaxies
BL Lacertae objects
Quasars
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:11336/227894
Acceder
id CONICETDig_319e24fec72ebf98425f129628c314ea
oai_identifier_str oai:ri.conicet.gov.ar:11336/227894
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164Roy, AbhradeepGupta, Alok C.Chitnis, Varsha R.Cellone, Sergio AldoRaiteri, Claudia M.Romero, Gustavo EstebanWiita, Paul J.Chatterjee, AnshuCombi, Jorge ArielLiao, MaiSarkar, ArkadiptaVillata, MassimoGalaxies; Active galaxiesBL Lacertae objectsQuasarshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present a long-term and intraday variability study of optical multiwaveband (U BV RI) data from the blazar AO 0235+164 collected by various telescopes for ∼44 yr (1975-2019). The blazar was found to be significantly variable over the years in all wave bands with a variation of about 6 mag between its low and active states. The variations in the different wave bands are highly correlated without any time lag. We did not observe any significant trend in color variation with time, but we observed a bluer-when-brighter trend between the B − I color index and the R magnitude. Optical BV R-band spectral energy distributions always show a convex shape. Significant intraday variability was frequently seen in the quasi-simultaneous observations of AO 0235+164 made on 22 nights in the R and V bands by the CASLEO and CAHA telescopes during 1999-2019. We also estimated a central supermassive black hole mass of 7.9 × 107 M ⊙ by analyzing the broad Mg ii emission line in AO 0235+164's spectrum. We briefly explore the probable physical scenarios responsible for the observed variability.Fil: Roy, Abhradeep. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; EspañaFil: Gupta, Alok C.. Aryabhatta Research Institute Of Observational Sciences; India. Chinese Academy of Sciences; República de ChinaFil: Chitnis, Varsha R.. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; EspañaFil: Cellone, Sergio Aldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "El Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico "El Leoncito". Universidad Nacional de la Plata. Complejo Astronómico "El Leoncito". Universidad Nacional de San Juan. Complejo Astronómico "El Leoncito"; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Raiteri, Claudia M.. Istituto Nazionale di Astrofisica; ItaliaFil: Romero, Gustavo Esteban. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Wiita, Paul J.. The College Of New Jersey; Estados UnidosFil: Chatterjee, Anshu. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; EspañaFil: Combi, Jorge Ariel. Universidad de Jaén; España. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Liao, Mai. University Of Science And Technology Of China; ChinaFil: Sarkar, Arkadipta. Deutsches Elektronen-synchrotron; AlemaniaFil: Villata, Massimo. Istituto Nazionale di Astrofisica; ItaliaIOP Publishing2023-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/227894Roy, Abhradeep; Gupta, Alok C.; Chitnis, Varsha R.; Cellone, Sergio Aldo; Raiteri, Claudia M.; et al.; Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164; IOP Publishing; Astrophysical Journal Supplement Series; 265; 1; 3-2023; 14-330067-0049CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4365/acb059info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4365/acb059info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:54:54Zoai:ri.conicet.gov.ar:11336/227894instacron: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:34982025-10-22 11:54:54.882CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164
title Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164
spellingShingle Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164
Roy, Abhradeep
Galaxies; Active galaxies
BL Lacertae objects
Quasars
title_short Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164
title_full Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164
title_fullStr Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164
title_full_unstemmed Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164
title_sort Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164
dc.creator.none.fl_str_mv Roy, Abhradeep
Gupta, Alok C.
Chitnis, Varsha R.
Cellone, Sergio Aldo
Raiteri, Claudia M.
Romero, Gustavo Esteban
Wiita, Paul J.
Chatterjee, Anshu
Combi, Jorge Ariel
Liao, Mai
Sarkar, Arkadipta
Villata, Massimo
author Roy, Abhradeep
author_facet Roy, Abhradeep
Gupta, Alok C.
Chitnis, Varsha R.
Cellone, Sergio Aldo
Raiteri, Claudia M.
Romero, Gustavo Esteban
Wiita, Paul J.
Chatterjee, Anshu
Combi, Jorge Ariel
Liao, Mai
Sarkar, Arkadipta
Villata, Massimo
author_role author
author2 Gupta, Alok C.
Chitnis, Varsha R.
Cellone, Sergio Aldo
Raiteri, Claudia M.
Romero, Gustavo Esteban
Wiita, Paul J.
Chatterjee, Anshu
Combi, Jorge Ariel
Liao, Mai
Sarkar, Arkadipta
Villata, Massimo
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Galaxies; Active galaxies
BL Lacertae objects
Quasars
topic Galaxies; Active galaxies
BL Lacertae objects
Quasars
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present a long-term and intraday variability study of optical multiwaveband (U BV RI) data from the blazar AO 0235+164 collected by various telescopes for ∼44 yr (1975-2019). The blazar was found to be significantly variable over the years in all wave bands with a variation of about 6 mag between its low and active states. The variations in the different wave bands are highly correlated without any time lag. We did not observe any significant trend in color variation with time, but we observed a bluer-when-brighter trend between the B − I color index and the R magnitude. Optical BV R-band spectral energy distributions always show a convex shape. Significant intraday variability was frequently seen in the quasi-simultaneous observations of AO 0235+164 made on 22 nights in the R and V bands by the CASLEO and CAHA telescopes during 1999-2019. We also estimated a central supermassive black hole mass of 7.9 × 107 M ⊙ by analyzing the broad Mg ii emission line in AO 0235+164's spectrum. We briefly explore the probable physical scenarios responsible for the observed variability.
Fil: Roy, Abhradeep. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; España
Fil: Gupta, Alok C.. Aryabhatta Research Institute Of Observational Sciences; India. Chinese Academy of Sciences; República de China
Fil: Chitnis, Varsha R.. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; España
Fil: Cellone, Sergio Aldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "El Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico "El Leoncito". Universidad Nacional de la Plata. Complejo Astronómico "El Leoncito". Universidad Nacional de San Juan. Complejo Astronómico "El Leoncito"; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Raiteri, Claudia M.. Istituto Nazionale di Astrofisica; Italia
Fil: Romero, Gustavo Esteban. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Wiita, Paul J.. The College Of New Jersey; Estados Unidos
Fil: Chatterjee, Anshu. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; España
Fil: Combi, Jorge Ariel. Universidad de Jaén; España. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Liao, Mai. University Of Science And Technology Of China; China
Fil: Sarkar, Arkadipta. Deutsches Elektronen-synchrotron; Alemania
Fil: Villata, Massimo. Istituto Nazionale di Astrofisica; Italia
description We present a long-term and intraday variability study of optical multiwaveband (U BV RI) data from the blazar AO 0235+164 collected by various telescopes for ∼44 yr (1975-2019). The blazar was found to be significantly variable over the years in all wave bands with a variation of about 6 mag between its low and active states. The variations in the different wave bands are highly correlated without any time lag. We did not observe any significant trend in color variation with time, but we observed a bluer-when-brighter trend between the B − I color index and the R magnitude. Optical BV R-band spectral energy distributions always show a convex shape. Significant intraday variability was frequently seen in the quasi-simultaneous observations of AO 0235+164 made on 22 nights in the R and V bands by the CASLEO and CAHA telescopes during 1999-2019. We also estimated a central supermassive black hole mass of 7.9 × 107 M ⊙ by analyzing the broad Mg ii emission line in AO 0235+164's spectrum. We briefly explore the probable physical scenarios responsible for the observed variability.
publishDate 2023
dc.date.none.fl_str_mv 2023-03
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/11336/227894
Roy, Abhradeep; Gupta, Alok C.; Chitnis, Varsha R.; Cellone, Sergio Aldo; Raiteri, Claudia M.; et al.; Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164; IOP Publishing; Astrophysical Journal Supplement Series; 265; 1; 3-2023; 14-33
0067-0049
CONICET Digital
CONICET
url http://hdl.handle.net/11336/227894
identifier_str_mv Roy, Abhradeep; Gupta, Alok C.; Chitnis, Varsha R.; Cellone, Sergio Aldo; Raiteri, Claudia M.; et al.; Study of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164; IOP Publishing; Astrophysical Journal Supplement Series; 265; 1; 3-2023; 14-33
0067-0049
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4365/acb059
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4365/acb059
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 IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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
_version_ 1846782249418096640
score 12.982451

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