Each object detected during the frames analysis of a particular set of data is given a unique identifier which consists of five integers:
Several different versions of the pipelines were run on the imaging data for the EDR (Table 20). The rerun number for each run distinguishes a set of pipeline versions. Two rerun numbers are important for the EDR. The first rerun was used to select targets for spectroscopic observation. The second rerun used the most recent versions of the pipelines, and the results of this processing are distributed. Between reruns of frames, the run, camCol and fieldID of detected objects do not change, because frames acts on individual frames. However, the objID does change. Future data releases will most likely be made with yet another rerun which uses the most current version of our pipelines and calibrations.
In addition, data quality flags are set for each field, after we evaluate the processing from an entire run. These are discussed below in section 4.6.