Multiwavelength optical and NIR variability analysis of the Blazar PKS 0027-426
Date
03/2022Author
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Abstract
We present multiwavelength spectral and temporal variability analysis of PKS 0027-426 using optical griz observations from Dark Energy Survey between 2013 and 2018 and VEILS Optical Light curves of Extragalactic TransienT Events (VOILETTE) between 2018 and 2019 and near-infrared (NIR) JKs observations from Visible and Infrared Survey Telescope for Astronomy Extragalactic Infrared Legacy Survey (VEILS) between 2017 and 2019. Multiple methods of cross-correlation of each combination of light curve provides measurements of possible lags between optical–optical, optical–NIR, and NIR–NIR emission, for each observation season and for the entire observational period. Inter-band time lag measurements consistently suggest either simultaneous emission or delays between emission regions on time-scales smaller than the cadences of observations. The colour–magnitude relation between each combination of filters was also studied to determine the spectral behaviour of PKS 0027-426. Our results demonstrate complex colour behaviour that changes between bluer when brighter, stable when brighter, and redder when brighter trends over different time-scales and using different combinations of optical filters. Additional analysis of the optical spectra is performed to provide further understanding of this complex spectral behaviour.
Citation
Guise , E , Hönig , S F , Almeyda , T , Horne , K , Kishimoto , M , Aguena , M , Allam , S , Andrade-Oliveira , F , Asorey , J , Banerji , M , Bertin , E , Boulderstone , B , Brooks , D , Burke , D L , Carnero Rosell , A , Carollo , D , Carrasco Kind , M , Carretero , J , Costanzi , M , da Costa , L N , Davis , T M , De Vicente , J , Doel , P , Everett , S , Ferrero , I , Flaugher , B , Frieman , J , Gandhi , P , Goad , M , Gruen , D , Gruendl , R A , Gschwend , J , Gutierrez , G , Hinton , S R , Hollowood , D L , Honscheid , K , James , D J , Johnson , M A C , Kuehn , K , Lewis , G F , Lidman , C , Lima , M , Maia , M A G , Malik , U , Menanteau , F , Miquel , R , Morgan , R , Ogando , R L C , Palmese , A , Paz-Chinchón , F , Pereira , M E S , Pieres , A , Plazas Malagón , A A , Sanchez , E , Scarpine , V , Serrano , S , Sevilla-Noarbe , I , Seymour , N , Smith , M , Soares-Santos , M , Suchyta , E , Swanson , M E C , Tarle , G , To , C & Tucker , B E 2022 , ' Multiwavelength optical and NIR variability analysis of the Blazar PKS 0027-426 ' , Monthly Notices of the Royal Astronomical Society , vol. 510 , no. 3 , pp. 3145-3177 . https://doi.org/10.1093/mnras/stab3457
Publication
Monthly Notices of the Royal Astronomical Society
Status
Peer reviewed
ISSN
0035-8711Type
Journal article
Rights
Copyright © 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at https://doi.org/10.1093/mnras/stab3457.
Description
Funding: EG and SFH acknowledge support from the Horizon 2020 ERC Starting Grant DUST-IN-THE-WIND (ERC-2015-StG-677117). EG acknowledges support from STFC for funding this PhD. Research leading to these results has received funding from the European Research Council under the European Union 7th Framework Programme (FP7/2007-2013) including ERC grant agreements 240672, 291329, and 306478. We acknowledge support from the Brazilian Instituto Nacional de Ciência Tecnologia (INCT) e-Universe (CNPq grant no. 465376/2014-2).Collections
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