Hasasia: A Python package for Pulsar Timing Array Sensitivity Curves. Hasasia is a Python package for calculating and building accurate PTA sensitivity curves, largely based on the formalism presented in (Hazboun, Romano, & Smith, 2019). This software is designed for use by astronomers interested in sources of nanohertz gravitational waves and PTA data analysts alike. It uses standard Python packages, such as Numpy (Oliphant, n.d.) and Astropy (Astropy Collaboration et al., 2018) to build sensitivity curves from generic PTAs of individually constructed pulsars. Hasasia includes the ability to add time-correlated (red) noise into the noise power spectral density of individual pulsars. The strongest expected signal in the PTA band is the stochastic gravitational wave background from supermassive binary black holes, which is also modeled as a red noise process. Therefore, it is important to take low-frequency noise into account when assessing the sensitivity of a PTA.

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  1. Jeffrey S. Hazboun, Joseph D. Romano, Tristan L. Smith: Hasasia: A Python package for Pulsar Timing Array Sensitivity Curves (2019) not zbMATH