Workflow of PIV (discussed in detail in Sect. 3.5). This is the part of TUVOpipe that collects information about each transient to supplement the UVOT light curve in order to obtain a preliminary classification and help determine whether further investigation is warranted. The operation of PIV is identical between the archival and real-time modes of the pipeline. The output of PIV (shown in Fig. 12) is all the light curves produced in PIII supplemented with basic source information, information from external catalogue queries, and variability information.