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WFCBOP*

An ICL procedure to aid in optimising the background rate (LEVS) threshold selection when producing WFC pointed images. WFCBOP computes (in a field-averaged sense) the optimum LEVS threshold (optimum for maximising S:N for a point source, assuming Gaussian statistics).

To run (from within ICL):

  ICL> LEVS=10000.0
  ICL> WFCBOP (ROOT) (FILT) (LEVS)

The online parameters are

   ROOT    CHAR     The root name of the data files, eg. 170096
   FILT    CHAR     The required WFC filter, eg. S1A, S2B, P1, P2
   LEVS    REAL     Contains the computed optimum LEVS limit (ct/s)

The procedure uses WFCSORT and ASTERIX routines. The procedure creates several temporary, working files, named BOPTEMP*.SDF, on the current default directory. Typical disk space occupied is 1k blocks. These files are deleted on successful completion.

Next: WFCCOUNTS Up: WFC ROSAT Prev: WFCAUTO