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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Multi-wavelength photometric and polarimetric observations of the outburst of 3C454.3 in 2009 december
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Multi-wavelength photometric and polarimetric observations of the outburst of 3C454.3 in 2009 december

机译：2009年12月3C454.3爆发的多波长光度和偏光观测

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In 2009 December, the bright blazar 3C 454.3 exhibited a strong outburst in the optical, X-ray, and gamma-ray regions. We performed photometric and polarimetric monitoring of this outburst in the optical and near-infrared bands with TRISPEC and HOWPol attached to the Kanata telescope. We also observed this outburst in the infrared band with AKARI and the radio band with the 32-m radio telescope of Yamaguchi University. The object was in an active state from JD2455055 to 2455159. It was 1.3 mag brighter than its quiescent state before JD2455055 in the optical band. After the end of the active state in JD2455159, a prominent outburst was observed in all wavelengths. The outburst continued for two months. Our optical and near-infrared polarimetric observations revealed that the position angle of the polarization (PA) apparently rotated clockwise by 240° within 11 d in the active state (JD 2455063-2455074); after this rotation, PA remained almost constant during our monitoring. In the outburst state, PA smoothly rotated counterclockwise by 350? within 35 d (JD 2455157-2455192). Thus, we detected two distinct rotation events of polarization vectors in opposite directions. We discuss these two events compared with the past rotation events observed in 2005, 2007, and 2008.
机译：2009年12月，明亮的blazar 3C 454.3在光学，X射线和伽马射线区域表现出强烈爆发。我们使用与Kanata望远镜相连的TRISPEC和HOWPol对光学和近红外波段的爆发进行了光度和偏振监测。我们还用AKARI在红外波段和山口大学的32米射电望远镜的无线电波段观察到了这种爆发。该对象处于从JD2455055到2455159的活动状态。它比光学波段JD2455055之前的静止状态亮1.3磁。在JD2455159中的活动状态结束后，在所有波长下均观察到明显的爆发。爆发持续了两个月。我们的光学和近红外极化观测结果表明，在活动状态下，极化（PA）的位置角在11 d内明显沿顺时针方向旋转了240°（JD 2455063-2455074）;旋转之后，PA在我们的监控期间几乎保持恒定。在爆发状态下，PA顺时针顺时针旋转了350？在35天内（JD 2455157-2455192）。因此，我们在相反的方向上检测到极化向量的两个不同的旋转事件。我们将这两个事件与2005、2007和2008年观察到的过去轮换事件进行了比较。

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