Guise, E;
Honig, SF;
Almeyda, T;
Horne, K;
Kishimoto, M;
Aguena, M;
Allam, S;
... Tucker, BE; + view all
(2022)
Multiwavelength optical and NIR variability analysis of the Blazar PKS 0027-426.
Monthly Notices of the Royal Astronomical Society
, 510
(3)
pp. 3145-3177.
10.1093/mnras/stab3457.
Preview |
Text
stab3457.pdf - Published Version Download (6MB) | Preview |
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.
| Type: | Article |
|---|---|
| Title: | Multiwavelength optical and NIR variability analysis of the Blazar PKS 0027-426 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stab3457 |
| Publisher version: | https://doi.org/10.1093/mnras/stab3457 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | galaxies: active, quasars: individual: PKS 0027-426, galaxies: jets |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10145124 |
Archive Staff Only
 |
View Item |
