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

Guise, E.; Honig, 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.; Rosell, A. Carnero; Carollo, D.; Kind, M. Carrasco; 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-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. und Tucker, B. E. (2022): Multiwavelength optical and NIR variability analysis of the Blazar PKS 0027-426. In: Monthly Notices of the Royal Astronomical Society, Bd. 510, Nr. 3: S. 3145-3177

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 (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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0035-8711
• Sprache: Englisch