Multiwavelength optical and NIR variability analysis of the Blazar PKS 0027-426
Multiwavelength optical and NIR variability analysis of the Blazar PKS 0027-426
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Blazer PKS 的多波长光学和 NIR 变异性分析 0027-426
DOI：
10.1093/mnras/stab3457
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发表时间：
2022
影响因子：
4.8
通讯作者：
Banerji, M
中科院分区：
文献类型：
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作者：
Guise, E;Hönig, S F;Almeyda, T;Horne, K;Kishimoto, M;Aguena, M;Allam, S;Andrade-Oliveira, F;Asorey, J;Banerji, M
我们利用2013年至2018年暗能量巡天的光学栅格观测和河外瞬变事件的VEILS光学光变曲线，对PKS 0027-426进行了多波长光谱和时间变化分析。（VOILETTE）2018年至2019年期间的近红外（NIR）JKsobservations来自天文学河外红外遗产调查（VEILS）的可见光和红外调查望远镜在2017年到2019年之间。光变曲线的每种组合的互相关的多种方法为每个观测季节和整个观测期间提供了光学-光学、光学-近红外和近红外-近红外发射之间可能的滞后测量。波段间的时间滞后测量始终表明，无论是同时发射或发射区域之间的时间尺度小于观测的节奏延迟。还研究了每种滤光片组合之间的颜色-幅度关系，以确定PKS 0027-426的光谱行为。我们的结果展示了复杂的颜色行为，在不同的时间尺度上并使用不同的光学滤波器组合，在更亮时趋势更蓝、更亮时趋势稳定和更亮时趋势更红之间变化。对光谱进行额外的分析，以进一步了解这种复杂的光谱行为。
We present multiwavelength spectral and temporal variability analysis of PKS 0027-426 using opticalgrizobservations 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)JKsobservations 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.