Deep Einstein@Home search for Continuous Gravitational Waves from the Central Compact Objects in the Supernova Remnants Cas A, Vela Jr. and G347.3-0.5 using LIGO public O3 data

We perform a search for continuous nearly monochromatic gravitational waves from the central compact objects associated with the supernova remnants (SNRs) Cas A, Vela Jr. and G347.3 using LIGO O3 public data.

The searches for all three targets have the board frequency range from 20 and 1500 Hz. The search is deployed on the volunteer computing project Einstein@Home for six monthes, with thousands of participants donating compute cycles to make this endeavour possible. After the search is done, we perform multi-stages sub-threshold follow-up searches for over 10 million most promising waveforms out of $10^{19}$ of the original search. 

The follow-up searches are currently on going which are expected to be done before March, 2024. We yet don't know if we can find any signal candidates or not. However, even there is no candidate found in the end, we can set the upper limits on the amplitude of gravitational wave signals from these three targets  which are approximately 80% more constraining than the most sensitive seaches up to date [1].