Multiband optical variability of 3C 279 on diverse time-scales

We have monitored the flat spectrum radio quasar, 3C 279, in the optical B, V, R and I passbands from 2018 February to 2018 July for 24 nights, with a total of 716 frames, to study flux, colour and spectral variability on diverse timescales. 3C 279 was observed using seven different telescopes: two...

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Detalles Bibliográficos
Autores principales: Agarwal, Aditi, Cellone, Sergio Aldo, Andruchow, Ileana, Mammana, Luis Antonio, Singh, Mridweeka, Anupama, G. C., Mihov, Boyko, Raj, Ashish, Slavcheva Mihova, L., Özdönmez, Aykut, Ege, Ergün
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2019
Materias:
Astronomía
galaxies: active
BL Lacertae objects: general
quasars: individual
BL Lacertae objects: individual: 3C 279
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125625
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125625
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Astronomía
galaxies: active
BL Lacertae objects: general
quasars: individual
BL Lacertae objects: individual: 3C 279
spellingShingle Astronomía
galaxies: active
BL Lacertae objects: general
quasars: individual
BL Lacertae objects: individual: 3C 279
Agarwal, Aditi
Cellone, Sergio Aldo
Andruchow, Ileana
Mammana, Luis Antonio
Singh, Mridweeka
Anupama, G. C.
Mihov, Boyko
Raj, Ashish
Slavcheva Mihova, L.
Özdönmez, Aykut
Ege, Ergün
Multiband optical variability of 3C 279 on diverse time-scales
topic_facet Astronomía
galaxies: active
BL Lacertae objects: general
quasars: individual
BL Lacertae objects: individual: 3C 279
description We have monitored the flat spectrum radio quasar, 3C 279, in the optical B, V, R and I passbands from 2018 February to 2018 July for 24 nights, with a total of 716 frames, to study flux, colour and spectral variability on diverse timescales. 3C 279 was observed using seven different telescopes: two in India, two in Argentina, two in Bulgaria and one in Turkey to understand the nature of the source in optical regime. The source was found to be active during the whole monitoring period and displayed significant flux variations in B, V, R, and I passbands. Variability amplitudes on intraday basis varied from 5.20% to 17.9%. A close inspection of variability patterns during our observation cycle reveals simultaneity among optical emissions from all passbands. During the complete monitoring period, progressive increase in the amplitude of variability with frequency was detected for our target. The amplitudes of variability in B, V, R and I passbands have been estimated to be 177%, 172%, 171% and 158%, respectively. Using the structure function technique, we found intraday timescales ranging from ∼23 minutes to about 115 minutes. We also studied colour-magnitude relationship and found indications of mild bluer-when-brighter trend on shorter timescales. Spectral indices ranged from 2.3 to 3.0 with no clear trend on long term basis. We have also generated spectral energy distributions for 3C 279 in optical B, V, R and I passbands for 17 nights. Finally, possible emission mechanisms causing variability in blazars are discussed briefly.
format Articulo
Preprint
author Agarwal, Aditi
Cellone, Sergio Aldo
Andruchow, Ileana
Mammana, Luis Antonio
Singh, Mridweeka
Anupama, G. C.
Mihov, Boyko
Raj, Ashish
Slavcheva Mihova, L.
Özdönmez, Aykut
Ege, Ergün
author_facet Agarwal, Aditi
Cellone, Sergio Aldo
Andruchow, Ileana
Mammana, Luis Antonio
Singh, Mridweeka
Anupama, G. C.
Mihov, Boyko
Raj, Ashish
Slavcheva Mihova, L.
Özdönmez, Aykut
Ege, Ergün
author_sort Agarwal, Aditi
title Multiband optical variability of 3C 279 on diverse time-scales
title_short Multiband optical variability of 3C 279 on diverse time-scales
title_full Multiband optical variability of 3C 279 on diverse time-scales
title_fullStr Multiband optical variability of 3C 279 on diverse time-scales
title_full_unstemmed Multiband optical variability of 3C 279 on diverse time-scales
title_sort multiband optical variability of 3c 279 on diverse time-scales
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/125625
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