TY - RPRT TI - sOPTICS: a modified density-based algorithm for identifying galaxy groups/clusters and brightest cluster galaxies AU - Ma, Hai-Xia [Nagoya University (Japan)] (ORCID:0000000252379433) AU - Takeuchi, Tsutomu T [Nagoya University (Japan); The Research Center for Statistical Machine Learning, the Institute of Statistical Mathematics, Tokyo (Japan)] (ORCID:0000000184167673) AU - Cooray, Suchetha [Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)] (ORCID:0000000292171696) AU - Zhu, Yongda [University of Arizona, Tucson, AZ (United States)] (ORCID:0000000333077525) PY - 2025 DO - 10.1093/mnras/staf115 UR - https://www.osti.gov/biblio/2575542 ID - 2575542 ER -