A Systematic Exploration of Kilonova Candidates from Neutron Star Mergers during the Third Gravitational-wave Observing Run

  title={A Systematic Exploration of Kilonova Candidates from Neutron Star Mergers during the Third Gravitational-wave Observing Run},
  author={Jillian C. Rastinejad and Kerry Paterson and Wen-fai Fong and David. J. Sand and Michael J. Lundquist and Griffin Hosseinzadeh and Eric Christensen and Philip N. Daly and A. R. Gibbs and S. W. Hall and F. Shelly and S. Yang},
  journal={The Astrophysical Journal},
We present a comprehensive analysis of 653 optical candidate counterparts reported during the third gravitational-wave (GW) observing run. Our sample concentrates on candidates from the 15 events (published in GWTC-2, GWTC-3, or not retracted on GraceDB) that had a >1% chance of including a neutron star in order to assess their viability as true kilonovae. In particular, we leverage tools available in real time, including pre-merger detections and cross-matching with catalogs (i.e., point… 



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