The task ingestsrcnames prepares the source-list file to be used as the input file for the task makethumbs. When a user wants to run makethumbs multiple times for one observation using the same input source-list and catalogue, preprocessing the source-list file with this task is likely to speed up the process by makethumbs considerably or possibly dramatically.
In practice, this task reads both a source list file in each observation (as is included in the distribution of the pipe-line processing) and an external catalogue file in the format of the 2XMM catalogue, matches them, then outputs the modified source list file that contains the new columns of IAUNAME, DETID, SRCID and INCATFLG. Among these the first three will be just propagated from the catalogue to the output file, whereas the last one, the boolean column of INCATFLG, indicates whether the source (in the output, as well as, input source lists) is included in the catalogue (TRUE) or not (FALSE).
The matching between the sources in the source list and external catalogue is based on the columns (or header attribute) of OBS_ID and SRC_NUM.
For further detail, please refer to the reference of makethumbs.
