GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo during the First Half of the Third Observing Run

Cosmographic model of the astroparticle skies

“…Ultra-high energy cosmic rays (UHECR) observed by the Pierre Auger Observatory at multi EeV energies appear to be distributed on the sphere consistently with baryonic matter within a hundred Mpc [3]. The latest messenger of astroparticle physics, in the form of gravitational waves (GW), unveiled about fifty binary mergers detected by LIGO and Virgo up to the end of 2019 [4].…”

Follow-up Search for UHE Photons from Gravitational Wave Sources with the Pierre Auger Observatory

“…Four of those, namely GW170817, GW170818, GW190701_203306 and GW190814, had some overlap with the field of view of the SD during the 1 day time window. These events belong to different source classes which are a BNS merger (GW170817) [22], two binary black hole mergers (GW170818, GW190701_203306) [19,20] and a black hole-neutron star merger candidate (GW190814) [23]. The BNS event GW170817 poses a special case since its host galaxy has been identified through electromagnetic follow-up observations as NGC 4993 [22] providing a much better localization than through the GW observation alone.…”

“…In Fig. 2, the accepted regions in the space of source localization Ω 50% and luminosity distance D L are visualized on top of the distribution of all confident GW observations published in GWTC-1 [19] and GWTC-2 [20].…”

Neutrino Emission from Supermassive Binary Black Hole Mergers

“…In addition, Fig. 3 contains the stellar mass binary black hole (BBH) merger rates, since these black holes can possess a strong relativistic jet and merge partially with a spin-flip as well [13], as the data from the Gravitational-Wave Transient Catalogue GWTC-2 shows [14]. We compared two reference merger rates of BBHs: the inferred merging BBH detection rate by the LIGO and Virgo Collaborations with 90 % confidence level [15] and an estimation for this rate by radio observations by [13].…”