Two-color photometry with high temporal resolution of the extremely variable blazar PKS 0537-441

We report the results of a microvariability monitoring campaign on the southern blazar PKS 0537-441. The source was observed in the V and R optical bands throughout six consecutive nights. Strong variations at both bands, with amplitudes of ∼0.3 mag, were observed on timescales of about 2 days. Smal...

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Detalles Bibliográficos
Autores principales: Romero, Gustavo Esteban, Cellone, Sergio Aldo, Combi, Jorge Ariel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2000
Materias:
Ciencias Astronómicas
BL lacertae objects: individual (PKS 0537-441)
Galaxies: active
Galaxies: photometry
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84260
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84260
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
BL lacertae objects: individual (PKS 0537-441)
Galaxies: active
Galaxies: photometry
spellingShingle Ciencias Astronómicas
BL lacertae objects: individual (PKS 0537-441)
Galaxies: active
Galaxies: photometry
Romero, Gustavo Esteban
Cellone, Sergio Aldo
Combi, Jorge Ariel
Two-color photometry with high temporal resolution of the extremely variable blazar PKS 0537-441
topic_facet Ciencias Astronómicas
BL lacertae objects: individual (PKS 0537-441)
Galaxies: active
Galaxies: photometry
description We report the results of a microvariability monitoring campaign on the southern blazar PKS 0537-441. The source was observed in the V and R optical bands throughout six consecutive nights. Strong variations at both bands, with amplitudes of ∼0.3 mag, were observed on timescales of about 2 days. Smaller fluctuations of ∼0.05 mag on a scale of a couple of hours are superposed on the larger outburst. The spectral index was also variable during the observing period, with an average value of α = -1.6 and changes up to ∼27.5%. The spectrum varies in the sense that it becomes harder when the source is brighter, in accordance with predictions of shock-in-jet models. We discuss our results and the possible origin of the variability in this blazar in light of recent higher frequency observations.
format Articulo
Articulo
author Romero, Gustavo Esteban
Cellone, Sergio Aldo
Combi, Jorge Ariel
author_facet Romero, Gustavo Esteban
Cellone, Sergio Aldo
Combi, Jorge Ariel
author_sort Romero, Gustavo Esteban
title Two-color photometry with high temporal resolution of the extremely variable blazar PKS 0537-441
title_short Two-color photometry with high temporal resolution of the extremely variable blazar PKS 0537-441
title_full Two-color photometry with high temporal resolution of the extremely variable blazar PKS 0537-441
title_fullStr Two-color photometry with high temporal resolution of the extremely variable blazar PKS 0537-441
title_full_unstemmed Two-color photometry with high temporal resolution of the extremely variable blazar PKS 0537-441
title_sort two-color photometry with high temporal resolution of the extremely variable blazar pks 0537-441
publishDate 2000
url http://sedici.unlp.edu.ar/handle/10915/84260
work_keys_str_mv AT romerogustavoesteban twocolorphotometrywithhightemporalresolutionoftheextremelyvariableblazarpks0537441
AT cellonesergioaldo twocolorphotometrywithhightemporalresolutionoftheextremelyvariableblazarpks0537441
AT combijorgeariel twocolorphotometrywithhightemporalresolutionoftheextremelyvariableblazarpks0537441
bdutipo_str Repositorios
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