【学术报告】
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报告题目：Maximising the detection probability of kilonovae associated with gravitational wave observations         

报告人：胡一鸣 （aLigo计划成员、天琴计划成员）

报告人单位：中山大学

报告时间：2017年5月9日（周二）上午 10:30-11:30

报告地点：小学校会议室

报告语言：中文

报告摘要： 

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Estimates of the source sky location for gravitational wave signals are likely to span areas of up to hundreds of square degrees or more, making it very challenging for most telescopes to search for counterpart signals in the electromagnetic spectrum. To boost the chance of successfully observing such counterparts, we have developed an algorithm that optimizes the number of observing fields and their corresponding time allocations by maximizing the detection probability. As a proof-of-concept demonstration, we optimize follow-up observations targeting kilonovae using telescopes including the CTIO-Dark Energy Camera, Subaru-HyperSuprimeCam, Pan-STARRS, and the Palomar Transient Factory. We consider three simulated gravitational wave events with 90% credible error regions spanning areas from $\sim 30\,{\deg }^{2}$ to $\sim 300\,{\deg }^{2}$. Assuming a source at $200\,\mathrm{Mpc}$, we demonstrate that to obtain a maximum detection probability, there is an optimized number of fields for any particular event that a telescope should observe. To inform future telescope design studies, we present the maximum detection probability and corresponding number of observing fields for a combination of limiting magnitudes and fields of view over a range of parameters. We show that for large gravitational wave error regions, telescope sensitivity rather than field of view is the dominating factor in maximizing the detection probability.

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