Kavli Affiliate: Kiyoshi W. Masui
| First 5 Authors: Emmanuel Fonseca, Ziggy Pleunis, Daniela Breitman, Ketan R. Sand, Bikash Kharel
| Summary:
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 intra-channel 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 (CHIME) telescope.
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