The following tables have been created for the receipt of the data coming from Opal: Synchrotron radiation background from VERTEX PROP TUBES M_OPAL_PROP ( timestamp date, prop_phot_l_tot number, prop_phot_r_tot number ); Electron background: Calorimeter. M_OPAL_CAL ( timestamp date, CAL_ELEC_L_TOT number, /* forward cal: left total */ CAL_ELEC_R_TOT number /* forward cal: right total */ ); Silicon Tungsten detectors. M_OPAL_SIW ( timestamp date, SIW_ELEC_L_TOT number, /* forward det: left total */ SIW_ELEC_R_TOT number /* forward det: right total */ ); Far forward cal M_OPAL_SIW_CAL ( timestamp date, SIWCAL_ELEC_L_TOT number, /* far forward cal: left total */ SIWCAL_ELEC_R_TOT number /* far forward cal: right total */ ); BACKGROUND 1 M_OPAL_BG1 ( timestamp date, bkg1 number ); BACKGROUND 2 M_OPAL_BG2 ( timestamp date, bkg2 number ); LUMINOSITY M_OPAL_LUMI ( timestamp date, lum number, /* opal luminosity */ lum_int number, /* Integrated luminosity. */ LUM_BGD number, /* relative amount of background */ LUM_ERR number /* statistical error units of 10E30 */ ); Silicon Detector Signals M_OPAL_SILICON ( timestamp date, PHOT_DIODE_U number, PHOT_DIODE_D number, PHOT_DIODE_I number, PHOT_DIODE_O number );