O3a Lensing – Search for Lensing Signatures in GW Data

#GWGreatestHits Gravitational waves can be gravitationally lensed (deflected or bent) by intervening cosmic objects, such as stars, black holes, galaxies, and galaxy clusters. During the third observing run, the LIGO-Virgo collaboration searched for lensing signatures in their data. Although they found no such evidence, even this improves understanding of the rate of merging binaries in the early Universe.

Indian researchers of the LIGO-India Scientific Collaboration (LISC), primarily from Inter-University Centre for Astronomy & Astrophysics (IUCAA), Pune, and International Centre for Theoretical Sciences (ICTS), Bengaluru, have played a major role in various aspects of the project. Dr. Anupreeta More (IUCAA) acted as lead of one of the investigations, in addition to reviewing other analyses. She was also a key contributor to the publication, together with Dr. Apratim Ganguly (IUCAA & ICTS) and Dr. Shasvath Kapadia (ICTS). Dr. Ganguly, along with Srashti Goyal (ICTS), were also involved in reviewing multiple analyses. Prof. Parameswaran Ajith (ICTS) also provided critical comments and suggestions at various stages of this project.