Please do remember that you are dealing with a coded mask instrument not with a focusing telescope and a CCD. It is not possible to deal with one source at a time: each source is background for the others, the whole field of view - and not just the few pixels around your source - matters!
In this Section, we guide you through your first IBIS analysis, but please read also Section 8, where more details on the main parameters are given. You could end up with fake sources that are created by a blind use of parameters! More tips and tricks are given in Section 9 for advanced users.
In the example below we analyze observations of the Galactic Center, using data we have downloaded and installed as it is described in Section 6.1.
Create the Observation Group with the og_create program (see its description in the Toolbox section of [1]):
cd $REP_BASE_PROD og_create idxSwg=isgri_gc.lst ogid=isgri_gc baseDir="./" instrument=IBIS
As a result of the og_create command, the directory $REP_BASE_PROD/obs/isgri_gc is created. In this directory you find all you need for the analysis, its structure is illustrated in Figure 11.
