Deep Einstein@Home all-sky search for continuous gravitational waves in LIGO O3 public data

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We present the results of an all-sky search for continuous gravitational waves in the public LIGO O3 data.

• The search covers signal frequencies $20$ Hz $\leq f \leq 800$ Hz and a spin-down range down to $-2.6\times 10^{-9}$ Hz s$^{-1}$1, motivated by detectability studies on synthetic populations of Galactic neutron stars.
• This search is the most sensitive all-sky search to date in this frequency/spin-down region.
• The initial search was performed using the first half of the public LIGO O3 data (O3a), utilizing Graphical Processing Units provided in equal parts by the volunteers of the Einstein@Home computing project and by the ATLAS cluster.