P3.18 Large spatial scale instrument and telescope flat field

• Phase : 3
• Status : Draft
• Category : Nighttime testing (functionality and operability) (C4)
• Recurrence : before every night observations (valid for all observing modes). 2/day for CI (BB filter only).
• Duration : 2 hours

Description

• Flat field taken during twilight

Prerequisites

• Authorize SHARK-NIR on the SX side.
• Atmospheric conditions: AO working conditions.
• Bad pixel map, Background or Dark.

Procedure

• This calibration is performed by sky observation combined with pointing scan in order to record a flat (that include telescope large scale transmission variations) on the detector.
• Single integration times for a given setup, using various flux level with natural light with no coronagraph.

Success criteria

• Width of flux distribution: 3.10-2

Notes

• Same as activity 7.5 in AD4

LBTO support

• Dome open during twilight

Associated SHARK-NIR personnel

Date performed and by whom