Filter information serviceMean wavelength. Defined as integ[x*filter(x) dx]/integ[filter(x) dx]Mean wavelength. Defined as integ[x*filter(x) dx]/integ[filter(x) dx]Effective wavelength. Defined as integ[x*filter(x)*vega(x) dx]/integ[filter(x)*vega(x) dx]Effective wavelength. Defined as integ[x*filter(x)*vega(x) dx]/integ[filter(x)*vega(x) dx]Minimum filter wavelength. Defined as the first lambda value with a transmission at least 1% of maximum transmissionMinimum filter wavelength. Defined as the first lambda value with a transmission at least 1% of maximum transmissionMaximum filter wavelength. Defined as the last lambda value with a transmission at least 1% of maximum transmissionMaximum filter wavelength. Defined as the last lambda value with a transmission at least 1% of maximum transmissionEffective width. Defined as integ[x*filter(x) dx].\nEquivalent to the horizontal size of a rectangle with height equal to maximum transmission and with the same area that the one covered by the filter transmission curve.Effective width. Defined as integ[x*filter(x) dx].\nEquivalent to the horizontal size of a rectangle with height equal to maximum transmission and with the same area that the one covered by the filter transmission curve.Full width at half maximum. Defined as the difference between the two wavelengths for which filter transmission is half maximumFull width at half maximum. Defined as the difference between the two wavelengths for which filter transmission is half maximumInstrumentObservational facilityPhotometric system