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

• AO support

Associated SHARK-NIR personnel

Date performed and by whom