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The arrival of Gravitational Waves and the EEE network: A few preliminary considerations

This document discusses the arrival of gravitational waves (GW) and their correlation with other cosmic messengers such as high-energy neutrinos and gamma-ray bursts. It also explores the capabilities of the EEE network in detecting GW events and provides a list of active telescopes during August 2017.

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The arrival of Gravitational Waves and the EEE network: A few preliminary considerations

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  1. The arrival of GravitationalWaves and the EEE network: Afewpreliminaryconsiderations F.Riggi & P. La Rocca EEE Meeting, March 28, 2018

  2. List of GW observed so far Label UTC Time Notes

  3. List of GW observed so far Label UTC Time Notes

  4. The event on August 14th, 2017 (UTC Time 10:30 43)

  5. The time scale: tens of milliseconds The observedeventswerelastingtimes of the order of 0.01 s 0.02’’

  6. Whataboutothermessengers Observation of GW eventstogether with otherprobesmeasured by differentexperimentshasbeen a point of interesteven in the past. Possibilities: Search for High Energy Neutrinosor Gammas

  7. A pastsearch from LIGO, VIRGO & ANTARES Analysis of old data (Jan-Sept. 2007) from LIGO, VIRGO & ANTARES for high energyneutrinos, carried out in 2013

  8. Whataboutothermessengers: Gamma RayBurst Followingrecentobservation of GW events, multimessengersearcheshavebecomeincreasinglyimportant. A recentexampleis the Gamma RayBurst (GRB) detected by FERMI and INTEGRAL Collaborations

  9. Whataboutothermessengers: Gamma RayBurst Observation of a GRB by the Fermi Gamma-RayBurst Monitor and by the INTEGRAL station on August 17, 2017 Time delay = (1.74 ± 0.05) s -3 10-15 < (c- speed of gravity)/c < +7 10 -16

  10. Whataboutothermessengers: neutrinos A combinedsearch for high energyneutrinoswithin ± 500 s

  11. The EEE network: Where and whento search The mainproblemisthatshowersinitiated by high energyprotons or nuclei arrive with an unknown delay with respect to GW or photons. Assuming a distance of 540 Mpc ( 1Mpc = 3.086 x 1022 m) Proton Energy γ (c-v)/c Delay over 540 Mpc 1 TeV 1066 4.4 10 -7 790 years 1019eV 1010 4.4 10 -21 250 µs

  12. The EEE network Doesitmakeanysense to search for correlatedevents from EEE? Individual EEE telescopes are mainly sensitive to muons from lowenergyshowers (1011- 1013eV = 0.1 – 10 TeV) Telescope clusters are sensitive to higherenergyshowers, depending on the mutualdistance Probablyalsofor individualtelescopesdetecting multi-trackevents During August 2017 only a fewtelescopeswereactive

  13. The EEE network: Active telescopes in August 2017 Telescope 14/08 17/08AREZ-01               x                   xBOLO-04               x                   xCERN-01               x                   xCERN-02               x                   xTORI-03             -- xTORI-04               x                   xTRAP-01              x                   --

  14. Nextsteps Carry out some search on the activetelescopesaround the expected UTC time for the August 14 & 17 GW events Evaluatethe background for single trackevents and multi-trackevents Search for anyeventclose to the expected time and compare to the background

  15. Just a first example.. More in the next weeks….

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