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arXiv 1902.08367astro-ph.IM
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RoboPol:四通道光学成像偏振计

RoboPol: A four-channel optical imaging polarimeter

A. N. Ramaprakash, C. V. Rajarshi, H. K. Das, P. Khodade, D. Modi, G. Panopoulou, S. Maharana, D. Blinov, E. Angelakis, C. Casadio, L. Fuhrmann, T. Hovatta, S. … 展开作者

A. N. Ramaprakash, C. V. Rajarshi, H. K. Das, P. Khodade, D. Modi, G. Panopoulou, S. Maharana, D. Blinov, E. Angelakis, C. Casadio, L. Fuhrmann, T. Hovatta, S. Kiehlmann, O. G. King, N. Kylafis, A. Kougentakis, A. Kus, A. Mahabal, A. Marecki, I. Myserlis, G. Paterakis, E. Paleologou, I. Liodakis, I. Papadakis, I. Papamastorakis, V. Pavlidou, E. Pazderski, T. J. Pearson, A. C. S. Readhead, P. Reig, A. Slowikowska, K. Tassis, J. A. Zensus

摘要:

我们提出了RoboPol的设计和性能,四通道光学偏振计在希腊克里特岛的Skinakas天文台工作。RoboPol能够在一次天空曝光中测量相对线性斯托克斯参数$q$和$u$(以及总强度$I$)。虽然主要用于测量R波段点光源的偏振,但该仪器具有额外的滤光片(B、V和I),可在大视场(13.6' $\times$ 13.6')上进行多波长成像偏振测量。我们证明了仪器在五年的运行中的准确性和稳定性。在视场的中心区域和R波段实现最佳性能。对于这样的测量,系统不确定性在分数线性偏振$p$中低于0.1%(0.05%极大似然)。在所有观测季节中,仪器偏振在$p$中变化在0.1%以内,偏振角在1 $^\circ$以内。

英文摘要:

We present the design and performance of RoboPol, a four-channel optical polarimeter operating at the Skinakas Observatory in Crete, Greece. RoboPol is capable of measuring both relative linear Stokes parameters $q$ and $u$ (and the total intensity $I$) in one sky exposure. Though primarily used to measure the polarization of point sources in the R-band, the instrument features additional filters (B, V and I), enabling multi-wavelength imaging polarimetry over a large field of view (13.6' $\times$ 13.6'). We demonstrate the accuracy and stability of the instrument throughout its five years of operation. Best performance is achieved within the central region of the field of view and in the R band. For such measurements the systematic uncertainty is below 0.1% in fractional linear polarization, $p$ (0.05% maximum likelihood). Throughout all observing seasons the instrumental polarization varies within 0.1% in $p$ and within 1$^\circ$ in polarization angle.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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