The pipeline processing of the Swift Data is performed at the Swift Data Center (SDC) at the Goddard Space Flight Center (GSFC). Data received from the spacecraft, via telemetry dumps to the ground station - Level 0 files - are used to create FITS files containing image and event data from from the 3 instruments. These files are then sent through the pipeline, which leads to the formation of calibrated images and cleaned event lists.
The image below shows a flow diagram indicating the different levels of Swift data processing. The raw telemetry is converted to Level 1 FITS files, which then undergo a small amount of processing. Level 2 calibrated event lists and sky images are produced after data screening and coordinate transformation.
The version number - 008 in this example - indicates how many times the data have been through the pipeline. A brief overview of the Swift file naming convention is given here.