Search For Gravitational Waves Associated With Gamma-Ray Bursts During The Second Advanced LIGO-Virgo Observing Run


Gamma-ray bursts (GRBs) are one of the most violent phenomena in the universe. They are generally divided into two categories: short-duration bursts created by a collision of two compact sources such as binary neutron stars; and long-duration bursts that are powered by the core collapse of rapidly rotating massive stars. We expect GRBs to be intrinsically linked to gravitational-wave (GW) emission, providing an opportunity for multimessenger astronomy. In this talk, I will present results from targeted GW searches associated with GRBs during the second Advanced LIGO-Virgo observing run. We have analyzed 42 (98) GRBs with modeled (unmodeled) searches and found no candidates other than GW170817. I will briefly discuss the case of GW170817-GRB170817A, as well as results for non-detections: analysis of subthreshold GRB population and lower bounds on the median source distance for various scenarios of GW emission. Finally, I will discuss the implications of these results for source rates and future observing runs.

Jul 10, 2019
Valencia, Spain
Ronaldas Macas
Postdoctoral Research Fellow

I am interested in data science and astrophysics of gravitational waves, and their application for multi-messenger astronomy.