== P3.11 Ghost positions on the SCICAM == • **Phase** : 3 • **Status** : Draft • **Category** : Nighttime testing (functionality and operability) (C4) • **Recurrence** : once at commissioning • **Duration** : 50 minutes **Description** • Locate the ghost positions at the SCICAM for on-axis and off-axis sources. **Prerequisites** • Atmospheric conditions: photometric. • Authorize SHARK-NIR on the SX side. • Bright stars as targets. • AO working. **Procedure** • Center the bright star (on-axis) and for varying observing conditions, obtain short and long-exposure images to locate the ghosts/features at the SCICAM. • Repeat this for every science filter. • Repeat the above two which has one (or more) bright stars off-axis as well. • Separate the ghosts from the filter defects if any (previously located/known). **Success criteria** • xxx **Notes** **LBTO support** • Support from LBTI/LBTO? **Associated SHARK-NIR personnel** • JF, LM, MdP **Date performed and by whom**