The High Time Resolution Universe survey - XIV. Discovery of 23 pulsars through GPU-accelerated reprocessing

Morello V, Barr ED, Cooper S, Bailes M, Bates S, Bhat NDR, Burgay M, Burke-Spolaor S, Cameron AD, Champion DJ, Eatough RP, et al. (2019)
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 483(3): 3673-3685.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
We have performed a new search for radio pulsars in archival data of the intermediate and high Galactic latitude parts of the Southern High Time Resolution Universe pulsar survey. This is the first time the entire dataset has been searched for binary pulsars, an achievement enabled by GPU-accelerated dedispersion and periodicity search codes nearly 50 times faster than the previously used pipeline. Candidate selection was handled entirely by a Machine Learning algorithm, allowing for the assessment of 17.6 million candidates in a few person-days. We have also introduced an outlier detection algorithm for efficient radio-frequency interference (RFI) mitigation on folded data, a new approach that enabled the discovery of pulsars previously masked by RFI. We discuss implications for future searches, particularly the importance of expanding work on RFI mitigation to improve survey completeness. In total, we discovered 23 previously unknown sources, including 6 millisecond pulsars and at least 4 pulsars in binary systems. We also found an elusive but credible redback candidate that we have yet to confirm.
Stichworte
methods: data analysis; pulsars: general
Erscheinungsjahr
2019
Zeitschriftentitel
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Band
483
Ausgabe
3
Seite(n)
3673-3685
ISSN
0035-8711
eISSN
1365-2966
Page URI
https://pub.uni-bielefeld.de/record/2935004

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Morello V, Barr ED, Cooper S, et al. The High Time Resolution Universe survey - XIV. Discovery of 23 pulsars through GPU-accelerated reprocessing. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2019;483(3):3673-3685.
Morello, V., Barr, E. D., Cooper, S., Bailes, M., Bates, S., Bhat, N. D. R., Burgay, M., et al. (2019). The High Time Resolution Universe survey - XIV. Discovery of 23 pulsars through GPU-accelerated reprocessing. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 483(3), 3673-3685. doi:10.1093/mnras/sty3328
Morello, V., Barr, E. D., Cooper, S., Bailes, M., Bates, S., Bhat, N. D. R., Burgay, M., Burke-Spolaor, S., Cameron, A. D., Champion, D. J., et al. (2019). The High Time Resolution Universe survey - XIV. Discovery of 23 pulsars through GPU-accelerated reprocessing. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 483, 3673-3685.
Morello, V., et al., 2019. The High Time Resolution Universe survey - XIV. Discovery of 23 pulsars through GPU-accelerated reprocessing. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 483(3), p 3673-3685.
V. Morello, et al., “The High Time Resolution Universe survey - XIV. Discovery of 23 pulsars through GPU-accelerated reprocessing”, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 483, 2019, pp. 3673-3685.
Morello, V., Barr, E.D., Cooper, S., Bailes, M., Bates, S., Bhat, N.D.R., Burgay, M., Burke-Spolaor, S., Cameron, A.D., Champion, D.J., Eatough, R.P., Flynn, C.M.L., Jameson, A., Johnston, S., Keith, M.J., Keane, E.F., Kramer, M., Levin, L., Ng, C., Petroff, E., Possenti, A., Stappers, B.W., van Straten, W., Tiburzi, C.: The High Time Resolution Universe survey - XIV. Discovery of 23 pulsars through GPU-accelerated reprocessing. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 483, 3673-3685 (2019).
Morello, V., Barr, E. D., Cooper, S., Bailes, M., Bates, S., Bhat, N. D. R., Burgay, M., Burke-Spolaor, S., Cameron, A. D., Champion, D. J., Eatough, R. P., Flynn, C. M. L., Jameson, A., Johnston, S., Keith, M. J., Keane, E. F., Kramer, M., Levin, L., Ng, C., Petroff, E., Possenti, A., Stappers, B. W., van Straten, W., and Tiburzi, Caterina. “The High Time Resolution Universe survey - XIV. Discovery of 23 pulsars through GPU-accelerated reprocessing”. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 483.3 (2019): 3673-3685.