GJC: Sebastian Gomez Lopez "The inner workings of a coherent modeled multimessenger search"
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Europe/Rome
Sala Lauree (Marconi)
Sala Lauree
Marconi
Description
The multimessenger observational campaign that connected GW170817, GRB 170817A, and AT2017gfo to the same BNS merger in the galaxy NGC 4993 was extremely successful. Such coincidence of Electromagnetic(EM) and Gravitational Wave(GW) transients may be viewed as a proof of concept for all the physics and astrophysics we can obtain from a multimessenger event. Even though observing further multimessenger transients has been challenging in recent years, the GW community has implemented and incrementally improved software in preparation for analyzing two possible future scenarios. 1) A well-localized BNS or NSBH GW trigger uncovered by low-latency all-sky all-time pipelines that search for significant triggers and deliver relevant information to EM telescopes for further follow-ups. 2) A deep search for GWs conducted with targeted coherent search pipelines on EM transients reported by facilities such as Fermi-GBM and Swift, in the case of gamma-ray bursts, or CHIME, in the case of fast radio bursts. This talk will focus on the second case and will introduce PyGRB[1, 2]; a matched filtering search for compact binaries built completely within the state-of-the-art PyCBC framework [3] that uses an EM-informed detection statistic to assess the astrophysical significance of EM-GW coincidences in LIGO-Virgo-KAGRA interferometric data.
References:
[1] I. W. Harry and S. Fairhurst, “A targeted coherent search for gravitational waves from compact binary coalescences,” Phys. Rev. D, vol. 83, p. 084002, 2011.
[2] A. R. Williamson, C. Biwer, S. Fairhurst, I. W. Harry, E. Macdonald, D. Macleod, and V. Predoi, “Improved methods for detecting gravitational waves associated with short gamma-ray bursts,” Phys. Rev. D, vol. 90, no. 12, p. 122004, 2014.
[3] S. A. Usman et al., “The PyCBC search for gravitational waves from compact binary coalescence,” Class. Quant. Grav., vol. 33, no. 21, p. 215004, 2016.