RAVEN: LIGO-Virgo-KAGRA gravitational wave focused multi-messenger pipeline

Assigning statistical significance to gravitational-wave triggers with external triggers such as electromagnetic waves (or neutrinos) is important for the astronomical community. We can compute the joint false alarm rate of these joint candidates, including sky localization information, within seconds and alert astronomers within a minute. Such analysis has to be performed simultaneously after the detection, since signals from astrophysical transients fade quickly, enabling follow-up studies that provide a deeper insight into the source objects and the physical processes within them. One such scenario would be the coincident detection of GW170817 and GRB170817A. In this talk, we will present the design and the testing of a low-latency framework adopted by the LVK collaboration, Rapid, on-source VOEvent Coincident Monitor (RAVEN). In addition, we will present the new features added to the O4 observing runs, such as using multi-ordered skymaps, filtering burst searches, sub-threshold searches, and the results from the mock data challenge (MDC) in preparation for testing for O4 readiness.