Modified WS

[Patrick Wils <patrickwils@yahoo.com>]

I have modified the WS program (see attached file) so that it also
displays the following, besides the existing WS statistic:
- the farthest outlier (expressed in standard deviations). Observations
which deviate more than 4 standard deviations from the nightly mean,
have been removed for the other calculations.
- the mean of nightly WS values (a minimum of 10 observations is
required for a night to be included): this should be better suited for
short period variables, because a difference in nightly means has been
removed by this procedure, e.g. the WS value for the Mira star SS Her
decreases from 85 to 0.7 !  But, I bet there is still a lot of room for
improvement here.
- the range in V (maximum nightly V - minimum nightly V) expressed in
units of the maximum nightly standard deviation
- the same for I

The last two values are large for long period variables.  It seems that
the I value is often inexplicably large compared to the V value, which
might indicate a problem in the night to night calibration.  The V
value seems more acceptable.  The star in the July data set with the
largest V range is John's eclipsing binary GSC 396-1222, and SS Her is
in third place.

All suggestions for improvement are welcome.

Patrick



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