Extreme intranight variability in the BL Lacertae object AO 0235+164

We present results of two-colour photometry with high time resolution of the violently variable BL Lac object AO 0235+164. We have found extreme intranight variability with amplitudes of ~ 100% over time scales of 24 hours. Changes of 0.5 magnitudes in both R and V bands were measured within a singl...

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Autores principales: Romero, Gustavo Esteban, Cellone, Sergio Aldo, Combi, Jorge Ariel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2000
Materias:
Ciencias Astronómicas
Galaxies: BL Lacertae objects: individual: AO 0235+164
Galaxies: photometry
Radiation mechanisms: nonthermal
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/101378
https://ri.conicet.gov.ar/11336/32312
http://adsabs.harvard.edu/abs/2000A%26A...360L..47R
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-101378
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
Galaxies: BL Lacertae objects: individual: AO 0235+164
Galaxies: photometry
Radiation mechanisms: nonthermal
spellingShingle Ciencias Astronómicas
Galaxies: BL Lacertae objects: individual: AO 0235+164
Galaxies: photometry
Radiation mechanisms: nonthermal
Romero, Gustavo Esteban
Cellone, Sergio Aldo
Combi, Jorge Ariel
Extreme intranight variability in the BL Lacertae object AO 0235+164
topic_facet Ciencias Astronómicas
Galaxies: BL Lacertae objects: individual: AO 0235+164
Galaxies: photometry
Radiation mechanisms: nonthermal
description We present results of two-colour photometry with high time resolution of the violently variable BL Lac object AO 0235+164. We have found extreme intranight variability with amplitudes of ~ 100% over time scales of 24 hours. Changes of 0.5 magnitudes in both R and V bands were measured within a single night, and variations up to 1.2 magnitudes occurred from night to night. A complete outburst with an amplitude ~ 30% was observed during one of the nights, while the spectrum remained unchanged. This seems to support an origin based on a thin relativistic shock propagating in such a way that it changes the viewing angle, as recently suggested by Kraus et al. (1999) and Qian et al. (2000).
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 Extreme intranight variability in the BL Lacertae object AO 0235+164
title_short Extreme intranight variability in the BL Lacertae object AO 0235+164
title_full Extreme intranight variability in the BL Lacertae object AO 0235+164
title_fullStr Extreme intranight variability in the BL Lacertae object AO 0235+164
title_full_unstemmed Extreme intranight variability in the BL Lacertae object AO 0235+164
title_sort extreme intranight variability in the bl lacertae object ao 0235+164
publishDate 2000
url http://sedici.unlp.edu.ar/handle/10915/101378
https://ri.conicet.gov.ar/11336/32312
http://adsabs.harvard.edu/abs/2000A%26A...360L..47R
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AT cellonesergioaldo extremeintranightvariabilityinthebllacertaeobjectao0235164
AT combijorgeariel extremeintranightvariabilityinthebllacertaeobjectao0235164
bdutipo_str Repositorios
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