Workflow of PI (discussed in detail in Sect. 3.2). This part of TUVOpipe downloads all UVOT data used to search for transients. In the archival mode, the RA and Dec of the field of interest is required as input. In the real-time mode, no input is required, since it always downloads all data available on the QL page at the time when PI is initiated. In the archival mode, the ObsID version check is bypassed, since ObsID versions of data in the archive are not further updated (except in rare cases when a reprocessing of the entire archive is carried out; see Sect. 2.1). Upon completion of PI, PII of the pipeline (see Sect. 3.3) is automatically initiated.