What question did this study set out to answer?

The aim is to establish upper limits for gravitational wave echo searches using CCEGA parameters.

May 6, 2026Open Access

P50: CCEGA Echo Search in GW170817 and GW190425 — First Upper Limits at t = 14 ms

Key Points

The aim is to establish upper limits for gravitational wave echo searches using CCEGA parameters.
Conducted a gravitational wave echo search using CCEGA-specific parameters at t_echo of 14 ms and frequency range Δf ∈ [240, 2000] Hz.
Analyzed gravitational wave events GW170817 and GW190425 using GWOSC public data.
Non-detection was assessed against O2/O3 sensitivity limits.
First upper limits at 3σ established for the analyzed events.
Non-detection findings do not falsify CCEGA.
Implicates potential advancements in gravitational wave analysis with future Einstein Telescope observations.

Abstract

First gravitational wave echo search using CCEGA-specific parameters: tₑcho = 14 ms, Δf ∈ 240, 2000 Hz. Analysis of GW170817 (H1+L1) and GW190425 (L1) using GWOSC public data. Non-detection consistent with O2/O3 sensitivity limits. First CCEGA-specific 3σ upper limits established. Does not falsify CCEGA. Definitive test: Einstein Telescope ~2035.

P50: CCEGA Echo Search in GW170817 and GW190425 — First Upper Limits at t = 14 ms

Key Points

Abstract

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