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

• Autor(a) principal: Guise, E.
• Data de Publicação: 2022
• Outros Autores: Honig, S. F., Almeyda, T., Horne, K., Kishimoto, M., Aguena, M., Allam, S., Andrade-Oliveira, F. [UNESP], Asorey, J., Banerji, M., Bertin, E., Boulderstone, B., Brooks, D., Burke, D. L., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Carretero, J., Costanzi, M., Costa, L. N. da, 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-Chinchon, F., Pereira, M. E. S., Pieres, A., Malagon, A. A. Plazas, 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.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1093/mnras/stab3457; http://hdl.handle.net/11449/218789
• topic: galaxies: active; quasars: individual: PKS 0027-426; galaxies: jets

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 (VOILIATE) 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.