== P3.5 Orient the coronagraphs == • **Phase** : 3 • **Status** : Draft • **Category** : Nighttime testing (functionality and operability) (C4) • **Recurrence** : once at commissioning • **Duration** : 40 minutes **Description** • Adjust the orientation of the coronagraphic masks with respect to the true orientation of M2 spider. **Prerequisites** • Atmospheric conditions: should be able to see bight stars on the sky (preferably close to zenith?). • Authorize SHARK-NIR on the SX side. • Suitable bright enough star close to zenith to have negligible effects from flexures (including the possibility of performing AO). **Procedure** • Pointing to a star, the first coronagraph is inserted in the path. The bearing is rotated maximizing the contrast achieved on the SCICAM. (use the pupil lens to see the pupils alignment maybe)? • This operation is repeated for all the coronagraphs. **Success criteria** • All the coronograph are aligned to the true orientation of the M2 spider by maximizing the contrast at SCICAM. • Note down the contrast achieved for all the coronograph including the atmospheric conditions and the brightness of the on-axis star. **Notes** **LBTO support** • Support from LBTI/LBTO? • Presence of John Hill usually helps while collimating for the first time. • Steve Allenson (as the TO) will be a great asset too. **Associated SHARK-NIR personnel** • JF, LM, MdP, MM (from AZ), DV? **Date performed and by whom**