Wide Field Camera 3 Instrument Handbook for Cycle 19 - Space ...

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Table of Contents
3.3 Comparison of WFC3 with Other HST Imaging
Instruments .................................................................................18
3.3.1 Wavelength Coverage..........................................................18
3.3.2 Field of View .......................................................................19
3.3.3 Detector Performance ..........................................................20
3.3.4 System Throughputs and Discovery Efficiencies................20
Chapter 4: Designing a Phase I WFC3
Proposal.......................................................................................24
4.1 Phase I and Phase II Proposals ............................................24
4.2 Preparing a Phase I Proposal................................................25
4.2.1 Which WFC3 Channel(s) and Filter(s)? ..............................25
4.2.2 What Exposure Times?........................................................25
4.2.3 What Aperture or Subarray? ................................................27
4.2.4 What Overheads and How Many HST Orbits? ...................27
4.2.5 Any Special Calibration Observations?...............................28
4.2.6 What is the Total Orbit Request?.........................................28
Chapter 5: WFC3 Detector Characteristics
and Performance.................................................................29
5.1 Overview of this Chapter ......................................................29
5.2 The WFC3 UVIS Channel CCD Detectors......................30
5.2.1 Basics of CCD Operation ....................................................30
5.2.2 The WFC3 CCDs.................................................................31
5.3 WFC3 CCD Readout Formats.............................................33
5.3.1 Full-frame Readout ..............................................................33
5.3.2 Subarrays .............................................................................34
5.3.3 On-Chip Binning..................................................................34
5.4 WFC3 CCD Characteristics and Performance ................34
5.4.1 Quantum Efficiency.............................................................34
5.4.2 Multiple-Electron Events at Short Wavelengths .................35
5.4.3 Flat Fields ............................................................................36
5.4.4 Long-Wavelength Fringing..................................................38
5.4.5 Linearity and Saturation.......................................................40
5.4.6 Gain......................................................................................40
5.4.7 Read Noise...........................................................................41
5.4.8 Dark Current ........................................................................42
5.4.9 Bad Pixels ............................................................................43
5.4.10 Cosmic Rays ......................................................................45
5.4.11 Charge-Transfer Efficiency ...............................................46
5.4.12 Crosstalk ............................................................................49