论文标题
Blazar S5 0716+714的多色光学监测从2017年到2019年
Multicolor Optical Monitoring of the Blazar S5 0716+714 from 2017 to 2019
论文作者
论文摘要
从2017年11月10日至2019年6月6日，我们在光学$ g $，$ r $和$ i $ $ bands中不断监视Blazar S5 0716+714。观察总数为201个晚上，包括26973个数据点。这是一个非常大的准杂种多色样品。平均时间跨度和时间分辨率分别为每晚3.4小时2.9分钟。在观察期间，$ r $带中的目标源从$ 14^{\ rm m} .16 $到$ 12^{\ rm m} .29 .29 $和五个突出的子量，然后首先变得轻率到$ 14^{\ rm m} .76 $和$ 12^^^^^^^^^^^^^\ rmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm rmm rmmmmmmmmmmmmmm rmm rmmmmmmmmmmmmmm rmmmmmmmm rmmmmmmmmm rmm c。子赛。对于长期的变化，当较低的通量状态下明亮（FWB）的趋势明亮（FWB）趋势时，我们发现较高的磁通状态下的FWB趋势较弱。还报道了较低的通量状态下的FWB趋势，然后还报道了较高通量状态下强大的FWB趋势。大多数子灯都显示出强大的FWB趋势，除了两个FWB趋势较弱的火焰。粒子加速度和冷却机制以及来自子量的不同FWB斜坡的叠加可能会解释光学颜色行为。讨论了弯曲喷气机的场景。
We continuously monitored the blazar S5 0716+714 in the optical $g$, $r$ and $i$ bands from Nov. 10, 2017 to Jun. 06, 2019. The total number of observations is 201 nights including 26973 data points. This is a very large quasi-simultaneous multicolor sample for the blazar. The average time spans and time resolutions are 3.4 hours and 2.9 minutes per night, respectively. During the period of observations, the target source in the $r$ band brightens from $14^{\rm m}.16$ to $12^{\rm m}.29$ together with five prominent sub-flares, and then first becomes fainter to $14^{\rm m}.76$ and again brightens to $12^{\rm m}.94$ with seven prominent sub-flares. For the long-term variations, we find a strong flatter when brighter (FWB) trend at a low flux state and then a weak FWB trend at a higher flux state. A weak FWB trend at a low flux state and then a strong FWB trend at a higher flux state are also reported. Most of sub-flares show the strong FWB trends, except for two flares with a weak FWB trend. The particle acceleration and cooling mechanisms together with the superposition of different FWB-slopes from sub-flares are likely to explain the optical color behaviours. A scenario of bent jet is discussed.
