Contents

• Introduction
  • Features
  • Free Software
  • Contributing
  • About this Manual
  • Related Projects
  
  
• Getting Started
  • Building and Running gcx
  • Starting with gcx
  • Navigating the Image
  • Examining the FITS Header
  • Stars
  • World Coordinate System
  • Aperture Photometry
  • Going Further
  
  
• Image Files
  • FITS Header fields
  • Viewing Image Files
  • Saving and Exporting Images
  
  
• Stars and Catalogs
  • Star Detection
  • Loading Catalog Stars
    • Object Catalogs
    • Field Star Catalogs
  • Star Files
  • Setting up Catalogs
    • Setting up GSC
    • Setting up Tycho2
    • Setting up Object Catalog Files
  
  
• World Coordinates
  • World Coordinate System Parameters
  • World Coordinate System States
  • Obtaining an Initial WCS
  • Fitting the WCS to an Image
    • WCS Fitting Commands
  
  
• CCD Reduction
  • CCD Camera Response Model
  • Bias and Dark Frames
    • Working without Bias Frames
  • Flat-field Frames
  • Reducing the Data Frames
  • Frame Combining Methods
  • CCD Reduction with gcx
    • Loading and Selecting Image Frames
    • Creating a Master Bias or Master Dark Frame
    • Creating a Bias-Subtracted Master Dark Frame
    • Creating a Master Flat Frame
    • Reducing the Data Frames
    • Aligning and Stacking Frames
    • Running CCD Reductions from the Command Line
  
  
• Aperture Photometry
  • Measuring Apertures
  • Sky Estimation
  • Placing the Apertures
  • Finding the Ensemble Photometry Solution
  • Annotations
  • Running Aperture Photometry
  • Creating Recipy Files
    • Target Stars
    • Standard Stars
    • Creating the Recipy File
    • Working without an Image Frame
    • Creating Recipies from the Command Line
  
  
• Multi-Frame and All-Sky Reduction
  • Color Transformation Coefficients
    • Transforming the Stars
  • All-Sky Reduction
    • Extinction Coefficient Fitting
    • Calculating Zero Points
  • Running Multi-Frame Reduction
    • Specifying Reduction Bands
    • Loading Report Files
    • Fitting Individual Zero Points
    • Plots
    • Fitting Color Transformation Coefficients
    • All-Sky Reduction
  • Reporting
  
  
• Noise Modelling
  • CCD Noise Sources
  • Noise of a Pixel Value
  • Dark Frame Subtraction
  • Flat Fielding
  • Instrumental Magnitude Error of a Star
  
  
• Robust Averaging
• Native Star Files
• Command Line Options
• Report Converter
• Global Options
  • File and Device Options
    • Fits Field Names
  • General Observation Setup Data
  • Telescope control options
  • Guiding options
  • CCD Reduction options
  • Star Detection and Search Options
  • Wcs Fitting Options
  • Aperture Photometry Options
  • Multi-Frame Photometry Options
  • Star Display Options
    • Star Display Colors
    • Star Display Shapes
  
  
• About this document ...