We present a framework for modeling astrophysical pulses from radio pulsars and fast radio bursts (FRBs). This framework, called fitburst, generates synthetic representations of dynamic spectra that are functions of several physical and heuristic parameters; the heuristic parameters can nonetheless accommodate a vast range of distributions in spectral energy. fitburst is designed to optimize the modeling of features induced by effects that are intrinsic and extrinsic to the emission mechanism, including the magnitude and frequency dependence of pulse dispersion and scatter broadening. fitburst removes intrachannel smearing through two-dimensional upsampling, and can account for phase-wrapping of “folded” signals that are typically acquired during pulsar-timing observations. We demonstrate the effectiveness of fitburst in modeling data containing pulsars and FRBs observed with the Canadian Hydrogen Intensity Mapping Experiment telescope.

中文翻译：

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使用 fitburst 对快速射电爆发和射电脉冲星的形态进行建模

我们提出了一个对射电脉冲星和快速射电爆发（FRB）的天体物理脉冲进行建模的框架。这个框架，称为突然爆发，生成动态谱的综合表示，该动态谱是多个物理和启发式参数的函数；尽管如此，启发式参数可以适应光谱能量的大范围分布。突然爆发旨在优化由发射机制的内在和外在效应引起的特征建模，包括脉冲色散和散射展宽的幅度和频率依赖性。突然爆发通过二维上采样消除通道内拖尾，并且可以解释通常在脉冲星定时观测期间获取的“折叠”信号的相位包裹。我们证明了以下方法的有效性突然爆发在包含加拿大氢强度测绘实验望远镜观测到的脉冲星和快速射电暴的建模数据中。