Dust Properties of the Interstellar Object 3I/ATLAS Revealed by Optical and Near-Infrared Polarimetry

The data are related to the paper by Choi et al. (ApJL, under review), "Dust Properties of the Interstellar Object 3I/ATLAS Revealed by Optical and Near-Infrared Polarimetry". All data were obtained using the Seoul National University (SNU) Quadruple Imaging Device for POLarimetry (SQUIDPOL),attached to the Cassegrain focus of the 0.6-m Ritchey-Chrétien telescope at the SNU Pyeongchang Observatory.