Optimizing the observation of optical kilonovae with medium-size telescopes
Optimizing the observation of optical kilonovae with medium-size telescopes
复制标题
优化中型望远镜对光学千新星的观测
DOI：
10.1093/mnras/stad1102
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发表时间：
2023
影响因子：
4.8
通讯作者：
Camisasca A
中科院分区：
文献类型：
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作者：
Camisasca A
我们考虑使用中型（2米级）光学望远镜在以弧分精度定位的千新星跟踪中优化观测策略（节奏、曝光时间和滤光片选择），以便能够区分各种千新星模型和视角。为了制定有效的观测计划，我们利用了通过蒙特卡罗辐射传输代码超新星偏振光谱合成获得的合成光曲线，针对不同的千新星模型，并将其作为不同视角和距离的函数。通过在合成光曲线中添加适当的光子计数噪声，我们分析了四个具有相同总曝光时间为 8 小时、具有不同时间窗口（0.5、1、2 和 4 小时）的替代序列，每个序列都带有 i、r 和 u 滤波器，以确定最大化正确识别模型参数的机会的观察序列。我们建议避免使用滤镜并避免使用颜色曲线。我们还发现，如果距离误差≤，0.5、1和2-h时间窗序列是等效的，所以我们建议使用2-h时间窗序列，因为它具有1-d节奏，所以很容易实现。当源的距离未知时，0.5小时的时间窗序列是优选的。
We consider the optimization of the observing strategy (cadence, exposure time, and filter choice) using medium-size (2-m-class) optical telescopes in the follow-up of kilonovae localized with arcminute accuracy to be able to distinguish among various kilonova models and viewing angles. To develop an efficient observation plan, we made use of the synthetic light curves obtained with the Monte Carlo radiative transfer code POlarization Spectral Synthesis In Supernovae for different kilonova models and as a function of different viewing angles and distances. By adding the appropriate photon counting noise to the synthetic light curves, we analysed four alternative sequences having the same total time exposure of 8 h, with different time windows (0.5, 1, 2, and 4 h), each withi, r, andufilters, to determine the observing sequence that maximizes the chance of a correct identification of the model parameters. We suggest to avoidufilter and to avoid the use of colour curves. We also found that, if the error on distance is ≤, 0.5, 1, and 2-h time window sequences are equivalent, so we suggest to use 2-h one, because it has 1-d cadence, so it can be easily realized. When the distance of the source is unknown, 0.5-h time window sequence is preferable.