arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2201.10680astro-ph.IM
收藏

Pan-STARRS GPC1摄像机内的串扰特性

Characterizing crosstalk within the Pan-STARRS GPC1 camera

T. J. L. de Boer, M. E. Huber, E. A. Magnier, P. M. Onaka, K. C. Chambers, C. -C. Lin, H. Gao, J. Fairlamb, R. J. Wainscoat

摘要:

使用为期一年的观测明亮恒星的专用活动的数据,我们研究了GPC 1相机中存在的串扰通道。通过分析这些数据,我们构建了一个数据集,该数据集检查相机内每个芯片的几乎每个CCD上的源星与所有可能的串扰目的地。我们使用聚类算法来查找潜在的串扰发生,然后还通过眼睛检查所有可能的组合(由硬件布局驱动)。这导致总共640个规则,通量衰减因子的范围从亮端的2.5 × 10 $^{2}$到暗端的2.5 $\times$ × 10 $^{4}$。m $_{cross}$ -m $_{src}\approx$-10.25的平均值对应于1.25 × 10 $^{4}$的衰减因子,其在明亮图像上产生平均信噪比为0.64 $\pm$ 0.1的串扰重影。我们没有发现在硬件设置中未连接的CCD之间存在串扰信号的证据。衰减因子的分布也被发现是依赖于串扰运动。一个明确的依赖于单元列偏移量被发现,一致的想法,即源星电荷在遍历单元读出线逐渐衰减。虽然我们可以看到趋势,但在现阶段,孔径星等测量的不确定性很大。

英文摘要:

Using data from a year-long dedicated campaign to observe bright stars, we study the crosstalk channels present in the GPC1 camera. By analyzing these data, we construct a dataset that checks source stars on almost every CCD of every chip within the camera against all possible crosstalk destinations. We use a clustering algorithm to find potential crosstalk occurrences, and then also check all possible combinations (driven by the hardware layout) by eye. This results in a total of 640 rules, with a flux attenuation factor ranging from 2.5x10$^{2}$ for the bright end to 2.5$\times$10$^{4}$ at the faint end. The average value of m$_{cross}$-m$_{src}\approx$-10.25 corresponds to an attenuating factor of 1.25x10$^{4}$, which produces crosstalk ghosts with an average signal-to-noise ratio of 0.64$\pm$0.1 on the bright images. We find no evidence of crosstalk signals between CCDs not connected in the hardware setup. The distribution of attenuation factors is also found to be dependent on crosstalk movement. A clear dependence on cell column offsets is found, consistent with the idea that the source star charge is progressively attenuated during the traversal of cell readout lines. While we can see the trends, the uncertainties on aperture magnitude measurements are large at this stage.

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。

↑