The Structure of Micro-Variability in the WEBT BL Lacertae Observation

IF 3.2 Q2 ASTRONOMY & ASTROPHYSICS
Galaxies Pub Date : 2023-11-01 DOI:10.3390/galaxies11060108
James R. Webb, Ivan Parra Sanz
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引用次数: 0

Abstract

We present the results of an in-depth analysis of the Whole Earth Blazar Telescope (WEBT) micro-variability observations made during a campaign done in 2020 on the blazar BL Lacertae. The data consisted of 231 days of optical imaging and we separated the long-term light curve into individual single-night light curves, and then chose 41 nights that contained over 100 individual observations and also showed micro-variations well above the noise. Micro-variability is defined as excursions in the order of 0.01–0.1 magnitudes over timescales of hours or minutes either above or below a linear background sampled over the entire night. We then fit each individual micro-variability curve with model pulses from turbulent cells using the turbulent jet model.. We present the results of the pulse fitting analysis, which yields turbulent cell sizes, amplitudes and turbulent plasma characteristics.
WEBT BL观测中微变异性的结构
我们介绍了对全球Blazar望远镜(WEBT)在2020年对Blazar BL Lacertae进行的一次活动中进行的微变化观测进行深入分析的结果。数据由231天的光学成像组成,我们将长期光曲线分离为单个单夜光曲线,然后选择41个夜晚,其中包含超过100个单独的观测,并且也显示出远高于噪声的微变化。微变异性被定义为在整晚采样的线性背景之上或之下,在以小时或分钟为时间尺度的0.01-0.1量级的偏移。然后,我们使用湍流射流模型将每个个体的微变异性曲线与湍流细胞的模型脉冲拟合。我们提出了脉冲拟合分析的结果,它产生了湍流细胞的大小,振幅和湍流等离子体的特性。
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来源期刊
Galaxies
Galaxies Physics and Astronomy-Astronomy and Astrophysics
CiteScore
4.90
自引率
12.00%
发文量
100
审稿时长
11 weeks
期刊介绍: Es una revista internacional de acceso abierto revisada por pares que proporciona un foro avanzado para estudios relacionados con astronomía, astrofísica y cosmología. Areas temáticas Astronomía Astrofísica Cosmología Astronomía observacional: radio, infrarrojo, óptico, rayos X, neutrino, etc. Ciencia planetaria Equipos y tecnologías de astronomía. Ingeniería Aeroespacial Análisis de datos astronómicos. Astroquímica y Astrobiología. Arqueoastronomía Historia de la astronomía y cosmología. Problemas filosóficos en cosmología.
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