J/A+A/707/A10 Isolated single-pulse pulsar candidates (Houben+, 2026)
The Northern High Time Resolution Universe pulsar survey.
II. Single-pulse search set-up and simulations.
Houben L.J.M., Falcke H., Spitler L.G., Barr E.D., Berezina M.,
Champion D.J., Karuppusamy R., Kramer M.
<Astron. Astrophys. 707, A10 (2026)>
=2026A&A...707A..10H 2026A&A...707A..10H (SIMBAD/NED BibCode)
ADC_Keywords: Radio sources ; Pulsars ; Positional data ; Velocity dispersion
Keywords: methods: data analysis - pulsars: general
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.
Description:
Detailed parameters of the isolated SP candidates identified in the
data of 1000 sky pointings of the HTRU-North survey (using 21 cm
multibeam receiver of the 100 m Effelsberg radio telescope) with the
SP search algorithm Heimdall. The Galactic position of the centre of a
candidate's detection beam is taken as its location, expressed in
Galactic longitude and latitude. As a reference, for each candidate
the DM contribution of the Galaxy is given as determined with the
NE2001 model. The parameters are presented for the 141 SP candidates in
tablee1.dat.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablee1.dat 46 141 List of detected isolated SP candidates
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See also:
J/A+A/445/243 : Pulsar subpulse modulation properties at 21cm
(Weltevrede+, 2006)
J/ApJS/257/59 : First CHIME/FRB Fast Radio Burst Catalog
(CHIME-FRB Col.+, 2021)
J/ApJ/812/81 : Arecibo Pulsar-ALFA (PALFA) survey. IV. (Lazarus+, 2015)
B/psr : ATNF Pulsar Catalogue (Manchester+, 2005)
Byte-by-byte Description of file: tablee1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Name Given candidate name (Name)
6- 11 F6.2 deg GLON Galactic longitude (GLong)
13- 18 F6.2 deg GLAT Galactic latitude (GLAT)
20- 23 F4.2 --- SNR Heimdall SNR of candidate (SNR)
25- 30 F6.1 pc/cm3 DM Heimdall dispersion measure of candidate (DM)
32- 37 F6.1 pc/cm3 DMgal NE2001 dispersion measure of Galaxy for the
cand's position (DM_gal)
39- 42 F4.1 ms Width Heimdall pulse width of the candidate (Width)
44- 46 I3 --- N Heimdall number member count of candidate
(Members)
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Acknowledgements:
Leon Houben, l.houben(at)astro.ru.nl
References:
Barr et al., Paper I 2013MNRAS.435.2234B 2013MNRAS.435.2234B
(End) Leon Houben [IMAPP], Luc Trabelsi [CDS] 06-Jan-2026