Multiwavelength optical and NIR variability analysis of the Blazar PKS 0027-426
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
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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