标题： MeerKAT脉冲星测时阵列的一个简单优化 显示英文标题

标题： A simple optimisation for the MeerKAT Pulsar Timing Array

摘要： MeerKAT 射电望远镜的脉冲星定时阵列计划（MPTA）的目标是探测纳赫兹频率的引力波（GWs）。最近，MPTA 和几个其他脉冲星定时阵列（PTA）联盟宣布了这种信号的证据。 给定一组脉冲星和观测策略，我们考虑是否可以通过对观测时间表进行小的调整来提高由大量黑洞双星群体产生的随机引力波背景信号的信噪比（S/N）。 我们的方法使用贪心算法在阵列中的脉冲星之间重新分配可用的积分时间。 致力于 MPTA 观测的总时间保持不变，因此当前的观测策略只有最小的干扰。 我们假设一个与所报告的一致的引力波信号。 为了演示我们的方法，我们也对 MPTA 中脉冲星的噪声特性做了一些简化假设。 根据这些假设，我们发现对于一个$\approx 20\%$年的 PTA 寿命，观测时间表的小幅调整可以提高信噪比$10\,{\rm yr}$。 显示英文摘要

摘要： The goal of the MeerKAT radio telescope's pulsar timing array programme (MPTA) is the detection of gravitational waves (GWs) of nanohertz frequencies. Evidence for such a signal was recently announced by the MPTA and several other pulsar timing array (PTA) consortia. Given an array of pulsars and an observation strategy, we consider whether small adjustments to the observing schedule can provide gains in signal-to-noise ratio (S/N) for a stochastic GW background signal produced by a population of massive black hole binaries. Our approach uses a greedy algorithm to reallocate available integration time between pulsars in the array. The overall time dedicated to MPTA observing is kept constant so that there is only minimal disruption to the current observation strategy. We assume a GW signal consistent with those reported. For the sake of demonstrating our method, we also make several simplifying assumptions about the noise properties of the pulsars in the MPTA. Given these assumptions, we find that small adjustments to the observing schedule can provide an increased S/N by $\approx 20\%$ for a $10\,{\rm yr}$ PTA lifespan.