EOS P96 - Default Chapter; Table of Contents

Doc:
Issue
Date
Page
VLT-MAN-ESO-14650-4942
P96
24.06.2015
8 of 161
ESO, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
TABLE OF CONTENTS
1. Introduction ...................................................................................................................11
1.1 Scope ...................................................................................................................12
1.2 X-shooter in a nutshell ..........................................................................................12
1.3 Shortcuts to most relevant facts for proposal preparation ......................................12
1.4 List of Abbreviations & Acronyms ..........................................................................13
1.5 Reference Documents ..........................................................................................14
1.6 Acknowledgements ...............................................................................................15
1.7 Contact .................................................................................................................15
1.8 News .....................................................................................................................16
2. Technical description of the instrument .........................................................................17
2.1 Overview of the opto-mechanical design ...............................................................18
2.2 Description of the instrument sub-systems ............................................................18
2.2.1 The Backbone ...............................................................................................19
2.2.1.1 The Instrument Shutter and The calibration unit ........................................19
2.2.1.2 The Acquisition and Guiding slide ..............................................................20
2.2.1.3 The IFU .....................................................................................................21
2.2.1.4 The Acquisition and Guiding Camera ........................................................23
2.2.1.5 The dichroic box ........................................................................................24
2.2.1.6 The flexure compensation tip-tilt mirrors ....................................................24
2.2.1.7 The Focal Reducer and Atmospheric Dispersion Correctors .....................25
2.2.2 ADCs problems and disabled ADCs observing mode in SLIT and IFU ..........26
2.2.3 Detector QE curves .......................................................................................35
2.2.4 The UVB spectrograph ..................................................................................35
2.2.4.1 Slit carriage ...................................................................................................35
2.2.4.2 Optical layout ................................................................................................36
2.2.4.3 Detector ........................................................................................................37
2.2.5 The VIS spectrograph ...................................................................................39
2.2.5.1 Slit carriage ...................................................................................................39
2.2.5.2 Optical layout ................................................................................................39
2.2.5.3 Detector ........................................................................................................39
2.2.6 The NIR spectrograph ...................................................................................40
2.2.6.1 Pre-slit optics and entrance window ..............................................................40
2.2.6.2 Slit wheels .....................................................................................................40
2.2.6.3 NIR Backgrounds ..........................................................................................44
2.2.6.4 Optical layout ................................................................................................47
2.2.6.5 Detector ........................................................................................................48
2.3 Spectral format, resolution and overall performances ...........................................51
2.3.1 Spectral format ..............................................................................................51
2.3.2 Spectral resolution and sampling ...................................................................52
2.3.3 Overall sensitivity ..........................................................................................53
2.4 Instrument features and known problems to be aware of ......................................55
2.4.1 UVB and VIS detectors sequential readout ...................................................55
2.4.2 Effects of atmospheric dispersion ..................................................................55
2.4.3 Remanence ...................................................................................................55
2.4.4 Ghosts ...........................................................................................................57
2.4.5 Inter-order background ..................................................................................58
2.4.6 NIR frames with the K-band blocking filter features .......................................58
2.4.7 NIR detector: interquadrant cross-talk and electrical ghosts ..........................60
2.4.8 Instrument stability ........................................................................................60