Data driven modeling of backgrounds in the ICARUS detector

The ICARUS T600 detector is a 760-ton Liquid Argon Time Projection Chamber (LArTPC) currently operating at Fermilab as a standalone detector and soon will be utilized as the Far Detector in the Short Baseline Neutrino (SBN) program. After a successful three year run in the Gran Sasso underground laboratory, the T600 detector received significant upgrades at CERN before being transported to the experimental hall at Fermilab. Now fully commissioned, ICARUS began regular data taking in May 2021 studying neutrinos from the Booster Neutrino Beam (BNB) and the Neutrinos at the Main Injector (NUMI) off-axis beam. After the first physics runs, many improvements were made to advance the detector performance. To better model backgrounds, ICARUS makes use of an overlay technique where we superimpose simulated neutrino events on detector beam off data. In this talk, I will present an overview of the status of the experiment and how we use overlays for data-driven modeling of backgrounds.