What is the name of the object that stores events inside of an index?

A bucket is the object that stores events inside of an index. According to the Splunk documentation1,

“An index is a collection of directories, also called buckets, that contain index files. Each bucket

represents a specific time range.” A bucket can be in one of several states, such as hot, warm, cold,

frozen, or thawed1. Buckets are managed by indexers or clusters of indexers1.