How do I display a source list on my data?
With the event data displayed in ds9, load the region file from the ds9 menu "Regions" -> "Load Regions..." -> s3_src.reg. (s3_src.reg is an ASCII file.) If the source list is in FITS format, it's necessary to include the extension with the filename: s3_src.fits[SRCLIST].
For more information on working with source lists, refer to the Using the Output of Detect Tools thread.
