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The current and next observation seasons will detect hundreds ofgravitational waves (GWs) from compact binary systems coalescence atcosmological distances. When combined with independent electromagneticmeasurements, the source redshift will be known, and we will be able to obtainprecise measurements of the Hubble constant $H_0$ via the distance-redshiftrelation. However, most observed mergers are not expected to haveelectromagnetic counterparts, which prevents a direct redshift measurement. Inthis scenario, one of the possibilities is to use the dark sirens method thatstatistically marginalizes over all the potential host galaxies within the GWlocation volume to provide a probabilistic redshift to the source. Here wepresented $H_{0}$ measurements using two new dark sirens compared to previousanalyses using DECam data, GW190924$\_$021846 and GW200202$\_$154313. Thephotometric redshifts of the possible host galaxies of these two events areacquired from the DECam Local Volume Exploration Survey (DELVE) carried out onthe Blanco telescope at Cerro Tololo in Chile. The combination of the $H_0$posterior from GW190924$\_$021846 and GW200202$\_$154313 together with thebright siren GW170817 leads to $H_{0} = 68.84^{+15.51}_{-7.74}\,\rm{km/s/Mpc}$. Including these two dark sirens improves the 68% confidenceinterval (CI) by 7% over GW170817 alone. This demonstrates that the inclusionof well-localized dark sirens in such analysis improves the precision withwhich cosmological measurements can be made. Using a sample containing 10well-localized dark sirens observed during the third LIGO/Virgo observationrun, we determine a measurement of $H_{0} = 76.00^{+17.64}_{-13.45}\, \rm{km/s/Mpc}$.

A dark siren measurement of the Hubble constant using gravitational wave events from the first three LIGO/Virgo observing runs and DELVE