Improved Acceleration of the GPU Fourier Domain Acceleration Search Algorithm

Adámek, Karel; Dimoudi, Sofia; Giles, Michael B.; Armour, Wes

doi:10.48550/arxiv.1711.10855

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…The data are then captured at 306.24 μs time resolution by the Transient User Supplied Equipment (TUSE), a real-time transient detection backend instrument developed by the MeerTRAP team at the University of Manchester. The GPU-based single pulse search pipeline AstroAccelerate 2 (Dimoudi & Armour 2015;Adámek & Armour 2016;Adámek et al 2017;Dimoudi et al 2018;Adámek & Armour 2019) is used to search for bursts in real-time after incoherently de-dispersing the data in the DM range 0-5118.4 pc cm −3 (see Caleb et al 2020, for more details).…”

Section: Meertrap Pipelinementioning

confidence: 99%

FRB 20210405I: the first Fast Radio Burst sub-arcsecond localised with MeerKAT

Driessen¹,

Barr²,

Buckley³

et al. 2023

Preprint

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We present the first sub-arcsecond localised Fast Radio Burst (FRB) detected using MeerKAT. The FRB, FRB 20210405I, was detected in the incoherent beam using the MeerTRAP pipeline on 2021 April 05 with a signal to noise ratio of 140.8 and a dispersion measure of 565.17 pc cm −3 . It was detected while MeerTRAP was observing commensally with the ThunderKAT large survey project, and was sufficiently bright that we could use the ThunderKAT 8s images to localise the FRB. Two different models of the dispersion measure in the Milky Way and halo suggest that the source is either right at the edge of the Galaxy, or outside. However, we use the combined localisation, dispersion measure, scattering, specific luminosity and chance coincidence probability information to find that the origin is most likely extragalactic and identify the likely host galaxy of the FRB: 2MASS J1701249−4932475. Using SALT spectroscopy and archival observations of the field, we find that the host is a disk/spiral galaxy at a redshift of 𝑧 = 0.066.

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Section: Meertrap Pipelinementioning

confidence: 99%

FRB 20210405I: the first Fast Radio Burst sub-arcsecond localised with MeerKAT

Driessen¹,

Barr²,

Buckley³

et al. 2023

Preprint

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“…More details on TUSE will be presented in an upcoming paper (Stappers et al in prep). The GPU-based single pulse search pipeline AstroAccelerate 5 (Dimoudi & Armour 2015;Adámek & Armour 2016;Adámek et al 2017;Dimoudi et al 2018;Adámek & Armour 2019) was used to search for bursts in real-time after incoherently de-dispersing the data in the DM range 0-5118.4 pc cm −3 (see Caleb et al 2020, for more details).…”

Section: Single Pulse Searchesmentioning

confidence: 99%

A MeerKAT, e-MERLIN, H.E.S.S. and Swift search for persistent and transient emission associated with three localised FRBs

Chibueze,

Caleb,

Spitler

et al. 2022

Preprint

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We report on a search for persistent radio emission from the one-off Fast Radio Burst (FRB) 20190714A, as well as from two repeating FRBs, 20190711A and 20171019A, using the MeerKAT radio telescope. For FRB 20171019A we also conducted simultaneous observations with the High Energy Stereoscopic System (H.E.S.S.) in very high energy gamma rays and searched for signals in the ultraviolet, optical, and X-ray bands. For this FRB, we obtain a UV flux upper limit of 1.39 × 10 −16 erg cm −2 s −1 Å −1 , X-ray limit of ∼ 6.6 × 10 −14 erg cm −2 s −1 and a limit on the very-high-energy gamma-ray flux Φ(𝐸 > 120 GeV) < 1.7 × 10 −12 erg cm −2 s −1 . We obtain a radio upper limit of ∼15𝜇Jy beam −1 for persistent emission at the locations of both FRBs 20190711A and 20171019A, but detect diffuse radio emission with a peak brightness of ∼53𝜇Jy beam −1 associated with FRB 20190714A at 𝑧 = 0.2365. This represents the first detection of the radio continuum emission potentially associated with the host (galaxy) of FRB 20190714A, and is only the third known FRB to have such an association. Given the possible association of a faint persistent source, FRB 20190714A may potentially be a repeating FRB whose age lies between that of FRB 20121102A and FRB 20180916A. A parallel search for repeat bursts from these FRBs revealed no new detections down to a fluence of 0.08 Jy ms for a 1 ms duration burst.

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“…The data for each beam are searched for bright bursts using the state-of-the-art, GPU-based single pulse search pipeline AstroAccelerate 3 (Dimoudi & Armour 2015;Adámek & Armour 2016;Adámek et al 2017;Dimoudi et al 2018;Adámek & Armour 2019). The real-time search was done by incoherently de-dispersing in the DM range 0-5118.4 pc cm −3 , divided into multiple sub-ranges with varying DM steps and time averaging factors.…”

Section: Single Pulse Search Pipelinementioning

confidence: 99%

Simultaneous multi-telescope observations of FRB 121102

Caleb,

Stappers,

Abbott

et al. 2020

Preprint

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We present 11 detections of FRB 121102 in ∼ 3 hours of observations during its 'active' period on the 10th of September 2019. The detections were made using the newly deployed MeerTRAP system and single pulse detection pipeline at the MeerKAT radio telescope in South Africa. Fortuitously, the Nançay radio telescope observations on this day overlapped with the last hour of MeerKAT observations and resulted in 4 simultaneous detections. The observations with MeerKAT's wide band receiver, which extends down to relatively low frequencies (900 − 1670 MHz usable L-band range), have allowed us to get a detailed look at the complex frequency structure, intensity variations and frequency-dependent sub-pulse drifting. The drift rates we measure for the full-band and sub-banded data are consistent with those published between 600 − 6500 MHz with a slope of −0.147 ± 0.014 ms −1 . Two of the detected bursts exhibit fainter 'precursors' separated from the brighter main pulse by ∼ 28 ms and ∼ 34 ms. A follow-up multi-telescope campaign on the 6th and 8th October 2019 to better understand these frequency drifts and structures over a wide and continuous band was undertaken. No detections resulted, indicating that the source was 'inactive' over a broad frequency range during this time.

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Improved Acceleration of the GPU Fourier Domain Acceleration Search Algorithm

Cited by 4 publications

References 3 publications

FRB 20210405I: the first Fast Radio Burst sub-arcsecond localised with MeerKAT

FRB 20210405I: the first Fast Radio Burst sub-arcsecond localised with MeerKAT

A MeerKAT, e-MERLIN, H.E.S.S. and Swift search for persistent and transient emission associated with three localised FRBs

Simultaneous multi-telescope observations of FRB 121102

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