This function returns a data.frame of which rows are duplicated and their time stamps.
which_duplicated(data = data.frame(), group, time)a data.frame containing burst or time data (if necessary)
a list where each entry is a vector of groupings where length == nrow(data)|nrow(time). Or a character vector describing the column name they are located in data
a vector of as.POSIXct time, or a character of the column name where it can be found in data