Since the event files are current, we can proceed with some simple analysis demonstrations. The following sections describe the use of Hera tasks using the both the command line and GUI interfaces, except in cases where one of the methods is particularly easy. People new to Hera (or SAS) will likely prefer the GUI, at least at first; however, as they become more familiar with the software and the keywords, they will probably migrate to the command line, which is faster. Assuming that the parameter values for any given task are the same, it does not matter if a task is invoked on the command line or in the GUI; the output files will be identical. The heraXmmselect GUI, in the ``experimental'' folder of ``XMM-SAS'', provides a very simple method for producing and displaying images, spectra, and light curves, and is the recommended method for extracting data unless large numbers of sources are being analyzed.
An event list from the MOS1 can be loaded by highlighting the event file mos1.fits in the PROC directory, then double-clicking on heraXmmselect. A Table Selection window will pop up to confirm your selection; clicking ``Go'' will start heraXmmselect. If using the Command Window, be sure it knows which directory you are working in by highlighting the directory in the GUI.