What's New in This Revision

The entire Data Handbook has been revised and updated to include the recent publications and results from various calibration programs. We list below the main changes made in different sections.

Information on Headerlet image extensions added, sink pixel DQ flags updated (Section 2.2)
calwf3 procedure updated (Section 3.1)
Information on removal of IRAF/PyRAF added (Section 3.1)
Data processing steps and use of PAM for point-source photometry updated (Section 3.2)
calwf3 calibration example added (Section 3.5)
Earlier ‘hypothetical’ examples are replaced with a new Jupyter notebook tutorial (Section 3.5)
Geometric distortion solutions updated (Section 4.1)
'astrodrizzle' information updated (Section 4.2)
Gain values for different bin settings added (Section 5.1)
Hot pixel details updated (Section 5.2)
Subsection added on pixel stability (Section 5.3.3)
Figures added to show ghost anomalies (Section 5.5.1)
CTE discussion updated, figures updated, references to recent ISRs added (Chapter 6)
Blob discussion updated (Section 7.5)
Two new sections added on 2020 P-flats and D-flats (blobs) (Section 7.5)
Note added on flat field errors from M35 scans, discussed in Section 7.11 (Section 7.5)
IR bad pixel figure updated (Section 7.9)
Snow-ball discussion updated (Section 7.9)
IR background discussion extended and figures revised (Section 7.10)
IR time dependent sensitivity discussion updated and figures added (Section 7.11)
Error discussion updated (Section 7.11)
Discussion of extra sources of persistence (asteroids etc.) added (Section 8.3)
New CALSPEC models added (Section 9.1)
UVIS Time-Dependent zeropoints added (Section 9.1)
UV Color Terms revised (Section 9.1)
IR zeropoints (based on new standard star observations) updated (Section 9.1)
IR sensitivity evolution (from M35 and OmegaCen observations) added (Section 9.1)
IR countrate non-linearity added (Section 9.1)
Information added on UVIS/IR PSF database (Section 9.1)
Discussion on extended and emission-line photometry added (Section 9.1)
G280 Calibration updated (Section 9.3)
IR Grism dispersed background updated (Section 9.3)
IR Grism Time-Dependent Sensitivity revised (Section 9.3)
Discussion on alternatives for STSDAS added (Section 9.4)
Notebook examples added for (i) Photometry, (ii) DASH and HSTaXe cookbook (Section 9.5)
Information added on repository for further python examples (Section 9.5)
Subsection added on IR Spatial scanned photometry (Section 10.2.2)

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WFC3 Data Handbook
- • Acknowledgments
- • What's New in This Revision
- Preface
  - • Handbook Structure
  - • Typographic Conventions
- Chapter 1: WFC3 Instruments
  - • 1.1 Instrument Overview
  - • 1.2 The UVIS Channel
  - • 1.3 The IR Channel
- Chapter 2: WFC3 Data Structure
  - • 2.1 Types of WFC3 Files
  - • 2.2 WFC3 File Structure
  - • 2.3 Data Storage Requirements
  - • 2.4 Headers and Keywords
- Chapter 3: WFC3 Data Calibration
  - • 3.1 The calwf3 Data Processing Pipeline
  - • 3.2 UVIS Data Calibration Steps
  - • 3.3 IR Data Calibration Steps
  - • 3.4 Pipeline Tasks
  - • 3.5 Manual Recalibration of WFC3 Data
- Chapter 4: WFC3 Images: Distortion Correction and AstroDrizzle
- Chapter 5: WFC3-UVIS Sources of Error
  - • 5.1 Gain and Read Noise
  - • 5.2 Bias Subtraction
  - • 5.3 Dark Current and Hot Pixels
  - • 5.4 UVIS Flat Fields
  - • 5.5 Image Anomalies
  - • 5.6 Generic Detector and Camera Properties
  - • 5.7 UVIS Photometry Errors
  - • 5.8 References
- Chapter 6: WFC3 UVIS Charge Transfer Efficiency - CTE
  - • 6.1 Overview
  - • 6.2 CTE Losses And Background
  - • 6.3 The Nature Of CTE Losses
  - • 6.4 The Pixel-Based Model
  - • 6.5 Empirical Corrections
  - • 6.6 Dealing With CTE Losses in WFC3 UVIS Images
  - • 6.7 Sink Pixels
  - • 6.8 References
- Chapter 7: WFC3 IR Sources of Error
  - • 7.1 WFC3 IR Error Source Overview
  - • 7.2 Gain
  - • 7.3 WFC3 IR Bias Correction
  - • 7.4 WFC3 Dark Current and Banding
  - • 7.5 Blobs
  - • 7.6 Detector Nonlinearity Issues
  - • 7.7 Count Rate Non-Linearity
  - • 7.8 IR Flat Fields
  - • 7.9 Pixel Defects and Bad Imaging Regions
  - • 7.10 Time-Variable Background
  - • 7.11 IR Photometry Errors
  - • 7.12 References
- Chapter 8: Persistence in WFC3 IR
- Chapter 9: WFC3 Data Analysis
  - • 9.1 Photometry
  - • 9.2 Astrometry
  - • 9.3 Spectroscopy
  - • 9.4 STSDAS, STSCI_PYTHON and Astropy
  - • 9.5 Specific Tools for the Analysis of WFC3
  - • 9.6 References
- Chapter 10: WFC3 Spatial Scan Data
  - • 10.1 Analysis of Scanned Data
  - • 10.2 IR Scanned Data
  - • 10.3 UVIS Scanned Data
  - • 10.4 References

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