A search for radio emission from double-neutron star merger GW190425 using Apertif

Boersma, Oliver M.; Leeuwen, J. van; Adams, Elizabeth A. K.; Adebahr, B.; Kutkin, A. M.; Oosterloo, Tom; Blok, W. J. G. de; Brink, R. van den; Coolen, A. H. W. M.; Connor, Liam; Damstra, S.; Dénes, H.; Hess, Kelley M.; Hulst, J. M. van der; Hut, B.; Ivashina, Marianna; Loose, G. M.; Lucero, D. M.; Maan, Yogesh; Mika, Á.; Moss, V. A.; Mulder, H.; Oostrum, L. C.; Ruiter, M.; Schuur, D. van der; Smits, R.; Vermaas, N. J.; Vohl, Dany; Ziemke, J.

doi:10.1051/0004-6361/202140578

Cited by 17 publications

(9 citation statements)

References 36 publications

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“…The follow-up in the radio domain was mostly focused on the characterization of specific candidate counterparts, either neutrino, X-ray or optical candidates [435,478,515]. No confirmed radio counterparts have been reported.…”

Section: Appendix A: Low-latency Alert System and Multimessenger Foll...mentioning

confidence: 99%

GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run

Abbott,

Acernese

et al. 2021

Preprint

378

697

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The third Gravitational-wave Transient Catalog (GWTC-3) describes signals detected with Advanced LIGO and Advanced Virgo up to the end of their third observing run. Updating the previous GWTC-2.1, we present candidate gravitational waves from compact binary coalescences during the second half of the third observing run (O3b) between 1 November 2019, 15:00 UTC and 27 March 2020, 17:00 UTC. There are 35 compact binary coalescence candidates identified by at least one of our search algorithms with a probability of astrophysical origin pastro > 0.5. Of these, 18 were previously reported as low-latency public alerts, and 17 are reported here for the first time. Based upon estimates for the component masses, our O3b candidates with pastro > 0.5 are consistent with gravitational-wave signals from binary black holes or neutron star-black hole binaries, and we identify none from binary neutron stars. However, from the gravitational-wave data alone, we are not able to measure matter effects that distinguish whether the binary components are neutron stars or black holes. The range of inferred component masses is similar to that found with previous catalogs, but the O3b candidates include the first confident observations of neutron star-black hole binaries. Including the 35 candidates from O3b in addition to those from GWTC-2.1, GWTC-3 contains 90 candidates found by our analysis with pastro > 0.5 across the first three observing runs. These observations of compact binary coalescences present an unprecedented view of the properties of black holes and neutron stars.

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Section: Appendix A: Low-latency Alert System and Multimessenger Foll...mentioning

confidence: 99%

GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run

Abbott,

Acernese

et al. 2021

Preprint

378

697

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“…Nonetheless, the individual components are below the highest precise NS mass measurement of 2.14 M [78]. Still an ambiguity in determining the nature of the components remains, since no matter effects were visible in the GW signal nor was an associated electromagnetic observation reported [96,97]. Fig.…”

Section: Interpretation Of the Detected Eventsmentioning

confidence: 87%

Leveraging gravitational-wave memory to distinguish neutron star--black hole binaries from black hole binaries

Tiwari,

Ebersold,

Hamilton

2021

Preprint

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In the observation of gravitational waves (GWs) from a compact binary coalescence system where the mass of one of the companions is ≤ 5 M the nature of the object is ambiguous until the measurements of tidal effects give evidence for the presence of a neutron star (NS) or a low mass black hole (BH). The relevance of tidal effects in a neutron star-black hole (NSBH) binary system depends crucially upon the mass and the spin of the companion BH. These effects become important predominantly when the binary system is of comparable mass and/or has large aligned spins. Depending upon the masses and spins the NS can even get tidally disrupted before the innermost stable circular orbit (ISCO) is reached. The gravitational-wave signatures of various tidal effects are encoded in the phasing of the signal and in the case of tidal disruption an abrupt cutoff of the signal amplitude occurs. In this work we show that tidal effects can also be captured by the nonlinear memory of the GW signal. Although small in amplitude, nonlinear memory is present at low frequency in contrast to the oscillatory GW signal. We introduce nonlinear memory in the NSBH and binary black hole (BBH) waveform models and show how the addition of memory aids in distinguishing NSBH systems from BBH systems for a larger part of the parameter space. We discuss the recently detected events of interest by LIGO-Virgo and provide the future prospects for the third generation detectors where nonlinear memory can play a crucial role in inferring the nature of the coalescence as BBH or NSBH from its GW signal alone.

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“…Apertif allows for the study of both kinds of emission. Afterglow searches are carried out in image domain (Boersma et al 2021) while prompt emission could be detected in time domain.…”

Section: Prompt and Slow Emission From Neutron-star Mergersmentioning

confidence: 99%

The Apertif Radio Transient System (ARTS): Design, commissioning, data release, and detection of the first five fast radio bursts

Leeuwen¹,

Kooistra²,

Oostrum³

et al. 2023

A&A

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Fast radio bursts (FRBs) must be powered by uniquely energetic emission mechanisms. This requirement has eliminated a number of possible source types, but several remain. Identifying the physical nature of FRB emitters arguably requires good localisation of more detections, as well as broad-band studies enabled by real-time alerting. In this paper, we present the Apertif Radio Transient System (ARTS), a supercomputing radio-telescope instrument that performs real-time FRB detection and localisation on the Westerbork Synthesis Radio Telescope (WSRT) interferometer. It reaches coherent-addition sensitivity over the entire field of the view of the primary-dish beam. After commissioning results verified that the system performed as planned, we initiated the Apertif FRB survey (ALERT). Over the first 5 weeks we observed at design sensitivity in 2019, we detected five new FRBs, and interferometrically localised each of them to 0.4−10 sq. arcmin. All detections are broad band, very narrow, of the order of 1 ms in duration, and unscattered. Dispersion measures are generally high. Only through the very high time and frequency resolution of ARTS are these hard-to-find FRBs detected, producing an unbiased view of the intrinsic population properties. Most localisation regions are small enough to rule out the presence of associated persistent radio sources. Three FRBs cut through the halos of M31 and M33. We demonstrate that Apertif can localise one-off FRBs with an accuracy that maps magneto-ionic material along well-defined lines of sight. The rate of one every ∼7 days ensures a considerable number of new sources are detected for such a study. The combination of the detection rate and localisation accuracy exemplified by the first five ARTS FRBs thus marks a new phase in which a growing number of bursts can be used to probe our Universe.

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A search for radio emission from double-neutron star merger GW190425 using Apertif

Cited by 17 publications

References 36 publications

GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run

GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run

Leveraging gravitational-wave memory to distinguish neutron star--black hole binaries from black hole binaries

The Apertif Radio Transient System (ARTS): Design, commissioning, data release, and detection of the first five fast radio bursts

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