It is not at all clear what you are wanting -- you need to clarify what you are wanting to do.
When you say "syslog" in your post, do you mean:
- console output?
- output of a particular job (and if so, all output? one particular output?)
- system logger output?
- something else entirely? and if so, what?
If, as I suspect, you are referring to the JES output of a single job -- be aware that this is SPOOL data, not a data set that can be accessed in any normal way. There is no data set name assigned to a spool file.