1.1 New for Cycle 33
We have made the following updates to the WFC3 Instrument Handbook for this cycle:
- We updated information, plots, and references throughout the handbook based on the Instrument Science Reports (ISRs) released in 2024.
- We replaced Figures 2.2, 3.1, 3.2, 3.3, 3.4, 3.5, 5.10, 5.11, 5.20, and 9.1 with equivalent but higher resolution versions
- We added Section 3.3.4, as well as Figures 3.6, 3.7, and 3.8, to compare select WFC3/UVIS and WFC3/IR bandpasses with JWST/NIRCAM filters.
- We updated Figures 5.8, 5.9, 5.13, and 5.14 to include the most recent WFC3/UVIS calibration data.
- We used the latest version of the SMOV4 in-flight WFC/IR quantum efficiency correction in the new version of Figure 5.25.
- We updated Figure 5.31 to reflect the most recent analysis of WFC3/IR pixel populations.
- We color-code bright sources and their corresponding figure-8 ghosts in the updated Figure 6.13.
- We discuss new analysis regarding the impact of x-CTE (serial CTE) in Section 6.9.
- We updated the estimated roll angle drift rate and translation in Sections 6.11.4 (UVIS) and 7.10.5 (IR).
- We revised Sections 6.11.5 and 7.10.6 to reflect that the Drift-And-SHift (DASH) observing method is unavailable in RGM.
- We added Table 7.11 to share WFC3/IR sensitivity loss rates for F098M and all five wide-band filters.
- We updated Sections 7.8 and 9.3 to reflect the new (2024) WFC3/IR time-dependent photometric calibration.
- We updated Figure 7.15 to include WFC3/IR blob positions as of May 2024.
- We used the latest (2021) calibration files to replace Figure 8.3, in which the UVIS G280 grism throughput (for the +1 and -1 orders) is plotted out to 800 nm.
- We added additional context regarding the 2020 calibration of the G280 grism to Section 8.2.
- We updated Section 8.6 to reflect new limitations to spatial scan rates (as of June 2024) due to RGM.
- The following changes have been made to Appendix E:
- We added the Cycle 32 calibration plan and time span to Table E.1 (Section E.1).
- We have added a summary of the WFC3 calibration plan for the current cycle in Section E.19.
- We added the Cycle 32 calibration plan and time span to Table E.1 (Section E.1).
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WFC3 Instrument Handbook
- • Acknowledgments
- Chapter 1: Introduction to WFC3
- Chapter 2: WFC3 Instrument Description
- Chapter 3: Choosing the Optimum HST Instrument
- Chapter 4: Designing a Phase I WFC3 Proposal
- Chapter 5: WFC3 Detector Characteristics and Performance
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Chapter 6: UVIS Imaging with WFC3
- • 6.1 WFC3 UVIS Imaging
- • 6.2 Specifying a UVIS Observation
- • 6.3 UVIS Channel Characteristics
- • 6.4 UVIS Field Geometry
- • 6.5 UVIS Spectral Elements
- • 6.6 UVIS Optical Performance
- • 6.7 UVIS Exposure and Readout
- • 6.8 UVIS Sensitivity
- • 6.9 Charge Transfer Efficiency
- • 6.10 Other Considerations for UVIS Imaging
- • 6.11 UVIS Observing Strategies
- Chapter 7: IR Imaging with WFC3
- Chapter 8: Slitless Spectroscopy with WFC3
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Chapter 9: WFC3 Exposure-Time Calculation
- • 9.1 Overview
- • 9.2 The WFC3 Exposure Time Calculator - ETC
- • 9.3 Calculating Sensitivities from Tabulated Data
- • 9.4 Count Rates: Imaging
- • 9.5 Count Rates: Slitless Spectroscopy
- • 9.6 Estimating Exposure Times
- • 9.7 Sky Background
- • 9.8 Interstellar Extinction
- • 9.9 Exposure-Time Calculation Examples
- Chapter 10: Overheads and Orbit Time Determinations
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Appendix A: WFC3 Filter Throughputs
- • A.1 Introduction
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A.2 Throughputs and Signal-to-Noise Ratio Data
- • UVIS F200LP
- • UVIS F218W
- • UVIS F225W
- • UVIS F275W
- • UVIS F280N
- • UVIS F300X
- • UVIS F336W
- • UVIS F343N
- • UVIS F350LP
- • UVIS F373N
- • UVIS F390M
- • UVIS F390W
- • UVIS F395N
- • UVIS F410M
- • UVIS F438W
- • UVIS F467M
- • UVIS F469N
- • UVIS F475W
- • UVIS F475X
- • UVIS F487N
- • UVIS F502N
- • UVIS F547M
- • UVIS F555W
- • UVIS F600LP
- • UVIS F606W
- • UVIS F621M
- • UVIS F625W
- • UVIS F631N
- • UVIS F645N
- • UVIS F656N
- • UVIS F657N
- • UVIS F658N
- • UVIS F665N
- • UVIS F673N
- • UVIS F680N
- • UVIS F689M
- • UVIS F763M
- • UVIS F775W
- • UVIS F814W
- • UVIS F845M
- • UVIS F850LP
- • UVIS F953N
- • UVIS FQ232N
- • UVIS FQ243N
- • UVIS FQ378N
- • UVIS FQ387N
- • UVIS FQ422M
- • UVIS FQ436N
- • UVIS FQ437N
- • UVIS FQ492N
- • UVIS FQ508N
- • UVIS FQ575N
- • UVIS FQ619N
- • UVIS FQ634N
- • UVIS FQ672N
- • UVIS FQ674N
- • UVIS FQ727N
- • UVIS FQ750N
- • UVIS FQ889N
- • UVIS FQ906N
- • UVIS FQ924N
- • UVIS FQ937N
- • IR F098M
- • IR F105W
- • IR F110W
- • IR F125W
- • IR F126N
- • IR F127M
- • IR F128N
- • IR F130N
- • IR F132N
- • IR F139M
- • IR F140W
- • IR F153M
- • IR F160W
- • IR F164N
- • IR F167N
- Appendix B: Geometric Distortion
- Appendix C: Dithering and Mosaicking
- Appendix D: Bright-Object Constraints and Image Persistence
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Appendix E: Reduction and Calibration of WFC3 Data
- • E.1 Overview
- • E.2 The STScI Reduction and Calibration Pipeline
- • E.3 The SMOV Calibration Plan
- • E.4 The Cycle 17 Calibration Plan
- • E.5 The Cycle 18 Calibration Plan
- • E.6 The Cycle 19 Calibration Plan
- • E.7 The Cycle 20 Calibration Plan
- • E.8 The Cycle 21 Calibration Plan
- • E.9 The Cycle 22 Calibration Plan
- • E.10 The Cycle 23 Calibration Plan
- • E.11 The Cycle 24 Calibration Plan
- • E.12 The Cycle 25 Calibration Plan
- • E.13 The Cycle 26 Calibration Plan
- • E.14 The Cycle 27 Calibration Plan
- • E.15 The Cycle 28 Calibration Plan
- • E.16 The Cycle 29 Calibration Plan
- • E.17 The Cycle 30 Calibration Plan
- • E.18 The Cycle 31 Calibration Plan
- • E.19 The Cycle 32 Calibration Plan
- • Glossary