Calculated bulge stellar spectrum of Mrk 509 host galaxy shown in the range observed by the OM optical grism. The spectrum is obtained from the HSTmeasurement at rest wavelength of 5100 Å given in Bentz et al. (2009) and using the bulge model template of Kinney et al. (1996) to calculate the flux at other wavelengths. The two data points (green crosses) superimposed on the spectrum are the nuclear stellar flux for the standard B and V filters measured by Kotilainen & Ward (1994); the horizontal bars represent the filter bandpasses.