The second set of pulsar discoveries by CHIME/FRB/Pulsar: 14 Rotating Radio Transients and 7 pulsars

Abstract

The Canadian Hydrogen Mapping Experiment (CHIME) is a radio telescope located in British Columbia, Canada. The large FOV allows CHIME/FRB to be an exceptional pulsar and Rotating Radio Transient (RRAT) finding machine, despite saving only the metadata of incoming Galactic events. We have developed a pipeline to search for pulsar/RRAT candidates using DBSCAN, a clustering algorithm. Follow-up observations are then scheduled with the more sensitive CHIME/Pulsar instrument capable of near-daily high time resolution spectra observations. We have developed the CHIME/Pulsar Single Pulse Pipeline to automate the processing of CHIME/Pulsar search-mode data. We report the discovery of 21 new Galactic sources, with 14 RRATs, 6 isolated long-period pulsars and 1 binary system. Owing to CHIME/Pulsar's observations we have obtained timing solutions for 8 of the 14 RRATs along with all the regular pulsars and the binary system. Notably we report that the binary system is in a long orbit of 412 days with a minimum companion mass of 0.1303 solar masses and no evidence of an optical companion within 10" of the pulsar position. This highlights that working synergistically with CHIME/FRB's large survey volume CHIME/Pulsar can obtain arc second localisations for low burst rate RRATs though pulsar timing. We find that the properties of our newly discovered RRATs are consistent with those of the presently known population. They tend to have lower burst rates than those found in previous surveys, which is likely due to survey bias rather than the underlying population.

References in corpus (51)

• The ATNF Pulsar Catalogue
• LOFAR: The LOw-Frequency ARray
• The Murchison Widefield Array: the Square Kilometre Array Precursor at low radio frequencies
• TEMPO2, a new pulsar timing package. I: Overview
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• Magnetars
• A fast radio burst associated with a Galactic magnetar
• A bright millisecond-duration radio burst from a Galactic magnetar
• The Parkes Multibeam Pulsar Survey: I. Observing and Data Analysis Systems, Discovery and Timing of 100 Pulsars
• Tempo2, a new pulsar timing package. II: The timing model and precision estimates
• Transient radio bursts from rotating neutron stars
• DSPSR: Digital Signal Processing Software for Pulsar Astronomy
• The First CHIME/FRB Fast Radio Burst Catalog
• NE2001.I. A New Model for the Galactic Distribution of Free Electrons and its Fluctuations
• Science with ASKAP - the Australian Square Kilometre Array Pathfinder
• The CHIME Fast Radio Burst Project: System Overview
• Science With The Australian Square Kilometre Array Pathfinder
• The Phase II Murchison Widefield Array: Design Overview
• Grand Unification in Neutron Stars
• The Green Bank Northern Celestial Cap Pulsar Survey - I: Survey Description, Data Analysis, and Initial Results
• The SUrvey for Pulsars and Extragalactic Radio Bursts II: New FRB discoveries and their follow-up
• CHIME/FRB Discovery of 25 Repeating Fast Radio Burst Sources
• FETCH: A deep-learning based classifier for fast transient classification
• The Commensal Real-time ASKAP Fast Transients (CRAFT) survey
• Further Searches for RRATs in the Parkes Multi-Beam Pulsar Survey
• The SUrvey for Pulsars and Extragalactic Radio Bursts I: Survey Description and Overview
• The LOFAR Pilot Surveys for Pulsars and Fast Radio Transients
• Optimal periodicity searching: Revisiting the Fast Folding Algorithm for large-scale pulsar surveys
• The High Time Resolution Universe Survey - III. Single-pulse searches and preliminary analysis
• The Green Bank North Celestial Cap Pulsar Survey III: 45 New Pulsar Timing Solutions
• Eight new millisecond pulsars from the first MeerKAT globular cluster census
• The CHIME Pulsar Project: System Overview
• FAST Globular Cluster Pulsar Survey: Twenty-Four Pulsars Discovered in Fifteen Globular Clusters
• Fast Radio Transient searches with UTMOST at 843 MHz
• Timing Solution and Single-pulse Properties for Eight Rotating Radio Transients
• A Study of Single Pulses in the Parkes Multibeam Pulsar Survey
• First discovery of new pulsars and RRATs with CHIME/FRB
• Detection of 25 new rotating radio transients at 111 MHz
• Eight Millisecond Pulsars Discovered in the Arecibo PALFA Survey
• A novel single-pulse search approach to detection of dispersed radio pulses using clustering and supervised machine learning
• Classifying RRATs and FRBs
• Study of 72 pulsars discovered in the PALFA survey: Timing analysis, glitch activity, emission variability, and a pulsar in an eccentric binary
• A Long-term study of three rotating radio transients
• The emission and scintillation properties of RRAT J2325-0530 at 154 MHz and 1.4 GHz
• Discovery of a steep-spectrum low-luminosity pulsar with the Murchison Widefield Array
• Hunting for radio emission from the intermittent pulsar J1107-5907 at low frequencies
• Mitigating radio frequency interference in CHIME/FRB real-time intensity data
• Evolution of the pc-scale structure of PKS 1934-638 revisited: first science with the ASKAP and New Zealand telescopes
• Rotating Radio Transients
• An Eclipsing Black Widow Pulsar in NGC 6712
• Rotating Radio Transients and Their Place Among Pulsars

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• The FAST Galactic Plane Pulsar Snapshot Survey: II. Discovery of 76 Galactic rotating radio transients and their enigma
• CHIME/FRB/Pulsar discovery of a nearby long period radio transient with a timing glitch
• The CRAFT Coherent (CRACO) upgrade I: System Description and Results of the 110-ms Radio Transient Pilot Survey
• Pushchino multibeams pulsar search. IV. Detection of new pulsars at declinations -9o < δ< +55o
• The Green Bank North Celestial Cap Survey IX: Timing Follow-up for 128 Pulsars
• Polarized radio emission of RRAT J1854+0306
• Seeking the nearest neutron stars using a new local electron density map
• On the spatial distribution of luminous blue variables in the M33 galaxy
• Deep Synoptic Array Science: Searching for Long Duration Radio Transients with the DSA-110
• The Northern High Time Resolution Universe pulsar survey: III. Single-pulse search continuation, follow-up observations, and initial results
• Constraining the selection corrected luminosity function and total pulse count for radio transients
• Exploring the nature of Galactic unassociated sources detected by the Fermi-LAT
• A study of 10 Rotating Radio Transients using Parkes radio telescope
• Pulsars identified in the LOFAR Two-metre Sky Survey at 144 MHz