The Northern High Time Resolution Universe pulsar survey: II. Single-pulse search set-up and simulations

Abstract

The High Time Resolution Universe (HTRU) survey is an all-sky survey looking for pulsars and other radio transients. A new single-pulse (SP) search pipeline is presented, tailored to the northern part of the HTRU survey collected with the 100m Effelsberg Radio Telescope. In a selection of this data, synthetic SPs are injected with frequency-time structures resembling those of the detected Fast Radio Burst (FRB) population and processed by the pipeline to characterize its performance. Therefore, several new software toolkits have been developed (FRBfaker and RFIbye) to enable the injection of SPs with complex frequency-time structures and cope with the Radio Frequency Interference (RFI) in the survey's data. The operation of these toolkits is described alongside the overall functionality of the SP pipeline. Qualification of the pipeline confirmed that it is ready to process all the HTRU-North data. Additionally, the survey's sensitivity to SPs, the impact of RFI thereon, the performance of the deep-learning classifier FETCH, and some insights that may be used to improve the pipeline's performance in the future are determined. Within the small data sample analysed, 21 known pulsars and a RRAT are detected. In addition, eight faint SP trains that might originate from yet undiscovered neutron stars and 141 isolated SP candidates were discovered.

21 pages, 15 figures, 5 tables

References in corpus (22)

• A bright millisecond radio burst of extragalactic origin
• The Five-Hundred-Meter Aperture Spherical Radio Telescope (FAST) Project
• The First CHIME/FRB Fast Radio Burst Catalog
• A radio transient with unusually slow periodic emission
• A long-period radio transient active for three decades
• The SUrvey for Pulsars and Extragalactic Radio Bursts I: Survey Description and Overview
• An Interference Removal Technique for Radio Pulsar Searches
• Sub-second periodicity in a fast radio burst
• The FRB 20121102A November rain in 2018 observed with the Arecibo Telescope
• Five new real-time detections of Fast Radio Bursts with UTMOST
• An emission state switching radio transient with a 54 minute period
• Constraints on the low frequency spectrum of FRB 121102
• Initial results from a realtime FRB search with the GBT
• The emission of interpulses by a 6.45-hour period coherent radio transient
• An Injection System for the CHIME/FRB Experiment
• Estimating fast transient detection pipeline efficiencies at UTMOST via real-time injection of mock FRBs
• Systematic performance of the ASKAP Fast Radio Burst search algorithm
• One-off and Repeating Fast Radio Bursts: A Statistical Analysis
• The Apertif Radio Transient System (ARTS): Design, Commissioning, Data Release, and Detection of the first 5 Fast Radio Bursts
• The Northern Cross Fast Radio Burst project IV. Multi-wavelength study of the actively repeating FRB 20220912A
• Eighteen new fast radio bursts in the High Time Resolution Universe survey
• A Target Search for Fast Radio Bursts Associated with Two Fast Blue Optical Transients: AT2018cow and CSS161010

Cited by in corpus (2)

• A broadband study of FRB20240114A with the Effelsberg 100-m radio telescope
• The Northern High Time Resolution Universe pulsar survey: III. Single-pulse search continuation, follow-up observations, and initial results