2020A&A...642A..26Z


Query : 2020A&A...642A..26Z

2020A&A...642A..26Z - Astronomy and Astrophysics, volume 642A, 26-26 (2020/10-1)

Applying saliency-map analysis in searches for pulsars and fast radio bursts.

ZHANG C., WANG C., HOBBS G., RUSSELL C.J., LI D., ZHANG S.-B., DAI S., WU J.-W., PAN Z.-C., ZHU W.-W., TOOMEY L. and REN Z.-Y.

Abstract (from CDS):


Context. We investigate the use of saliency-map analysis to aid in searches for transient signals, such as fast radio bursts and individual pulses from radio pulsars.
Aims. Our aim is to demonstrate that saliency maps provide the means to understand predictions from machine learning algorithms and can be implemented in pipelines used to search for transient events.
Methods. We implemented a new deep learning methodology to predict whether any segment of the data contains a transient event. The algorithm was trained using real and simulated data sets. We demonstrate that the algorithm is able to identify such events. The output results are visually analysed via the use of saliency maps.
Results. We find that saliency maps can produce an enhanced image of any transient feature without the need for de-dispersion or removal of radio frequency interference. The maps can be used to understand which features in the image were used in making the machine learning decision and to visualise the transient event. Even though the algorithm reported here was developed to demonstrate saliency-map analysis, we have detected a single burst event, in archival data, with dispersion measure of 41 cm–3 pc that is not associated with any currently known pulsar.

Abstract Copyright: © ESO 2020

Journal keyword(s): methods: data analysis - techniques: image processing - methods: statistical - methods: numerical - pulsars: general

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 FRB 010724 rB 01 18 06.0 -72 12 19           ~ 74 0
2 FRB 010312 rB 05 26 54.90 -64 56 19.2           ~ 17 0
3 FRB 20121102A rB 05 32 09.60 +33 05 13.4           ~ 579 0
4 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2231 1
5 PSR B1055-52 Psr 10 57 59.0450 -52 26 56.330           ~ 704 0
6 PSR J1536-5433 Psr 15 36 04.82 -54 33 15.0           ~ 12 0
7 PSR J1744-3130 Psr 17 44 05.8073853360 -31 30 04.275356436           ~ 12 0
8 NAME FRB J1852-08 rB 18 52 05.0 -08 29 35           ~ 49 0

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2022.12.07-03:41:09

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