Speaker
Description
Fast radio burst surveys are typically optimized for millisecond-duration events, leaving the parameter space of longer-duration coherent radio transients relatively unexplored. In this work, we investigate the selection function of the CHIME/Slow pipeline. CHIME/Slow is built on the wide-field 400–800MHz Canadian Hydrogen Intensity Mapping Experiment (CHIME) and extends transient searches to durations between 16ms and 5s, probing a largely unexplored regime between conventional FRB searches and slower radio transient studies.Using injected synthetic bursts spanning a range of widths, dispersion measures, fluences, and spectral properties, we compare injected and recovered populations to characterize the selection function across the search parameter space under the current pipeline setup. This analysis is currently in progress, with a preliminary characterization of the selection function across multiple burst properties expected by May 2026.
A quantitative characterization of the pipeline response is important both for improving search performance and for understanding how instrumental selection effects shape the observed sample of long-duration coherent radio transients.
