== P3.17 Orient the coronagraphs == 
 
- **Phase**		:	3  
- **Status**		: 	Draft	 
- **Category**	: 	Nighttime testing (functionality and operability) (C5) + Nighttime calibration (C6)
- **Recurrence**	: 	before every observing target (CI, LSS), starting from commissioning.
- **Duration**	:       4 hours

**Description**
- Adjust the orientation of the coronagraphic masks with respect to the true orientation of the M2 spider by rotating the SHARK-NIR derotator.

**Prerequisites**
- Atmospheric conditions: should be able to see bright stars in 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 pupil's alignment, maybe)?
- This operation is repeated for all the coronagraphs. 

**Templates**

**Success criteria**
- All the coronagraphs are aligned to the true orientation of the M2 spider by maximizing the contrast at SCICAM. 
- Note down the contrast achieved for all the coronagraphs, including the atmospheric conditions and the brightness of the on-axis star.

**Notes**

**LBTO support**
- AO support

**Date performed and by whom**