== 4.3 Exo-planet: Spectroscopic Characterization of known sub-stellar companions	 == 
•	**Phase**		:	4  
•	**Status**		: 	Draft	 
•	**Category**		: 	Science verification / Early science (C8)
•	**Recurrence**	: 	once after the completion of nighttime testing and performance check
•	**Duration**		: 	3 night(s)
**Description**
•	Exo-planet: Spectroscopic Characetization of known sub-stellar companions
**Prerequisites**
•	Authorize SHARK-NIR on the SX side.
•	Atmospheric conditions: CLEAR
•	Bad pixel map, Background or Dark, Flat-field, distortion map 
•	Cloud Cover		: no clouds
•	Astronomical Seeing	: 0.8" or better
•	Sky Background	: Any
•	Water Vapor		: low
•	Timing Windows	: no need to observe during meridian passage (field stabilized observing mode)
•	Observing Targets	: TBD We will consider stars with H mag in the range 4-12 (typical 7-9), R will have a similar distribution. Targets with a known companion at separation larger than 0.4" from the star and with contrast larger than 1E-5).
•	Observing Filters	: LSS observing mode, no filter
•	Detector Mode, DIT: according to the brightness of the target
•	Daytime Calibration Data required: dark/background, flat, wavelength calibration
•	Nighttime Calibration Data required: none

**Procedure**
•	We observe for more than 1 hour the star with the LSS observing mode. 
* We alternate the position of the slits from the position of the companion to outside the companion position to be able to create a library of images to be used to subtract the speckles. 
* An observation of the star without the coronagraphic mask is also requested to allow a proper flux calibration. 
* Also, we need observation of a standard star to be able to properly reduce the telluric lines. 
* The observation is performed in field stabilized mode. 
**Notes**

**LBTO support**
•	SOUL-AO support

**Associated SHARK-NIR personnel**

	
**Date performed and by whom**