500 fb-1 SM Data Sample at Ecm=500 GeV

Stdhep files for an Ecm=500 GeV SM data sample are
available at ftp://ftp-lcd.slac.stanford.edu/ilc/ILC500/StandardModel/ .
The sample corresponds to 250 fb-1 with -80% electron/ +30% positron polarization,
and 250 fb-1 with +80% electron/ -30% positron polarization.

Due to the presence of many high cross section processes the events are not completely unweighted.
The event weight must therefore always be considered when analyzing events.
This weight stored in the variable EVENTWEIGHTLH in the stdhep common block HEPEV4.