The Input Catalogue for the OMC camera onboard INTEGRAL

The Optical Monitoring Camera (OMC) onboard INTEGRAL ( launched on October 17, 2002) has been designed to obtain V-Johnson photometry simultaneously with high energy observations at X-ray (3-35 keV) and gamma-ray (15 keV-10 MeV) performed by the main instruments onboard INTEGRAL. Due to technical limitations on the data processing electronics and the available telemetry, it is necessary to know, a priori, the objects to be monitored within the field of view (FOV) of the OMC. The OMC Input Catalogue - and subsequent updates - provides this information: astrometric and photometric reference stars for calibration and scientific targets for accurate photometric variability studies.