Sextractor for dummies - METU Astrophysics

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18 CHAPTER 5: HOW SE WORKS Figure 5.2: SE flow diagram from the second manual. This shows clearly the many extra options over a simple run of SE; the possibilities of weight maps, flags, crosscorellation catalogs and many more.
Chapter 6 Using SE Source Extractor can be used in basically three ways: on a single file for both detection and photometry, on two files, one for detection, the other for photometry and on two files with crossidentification in the catalogs. 6.1 Using SE on one image SE needs a series of parameters in order to run and these can be given at the command line or in a configuration file. So to run SE on a single file with all the necessary parameters in the configuration file one types: sex image -c configuration file.txt If there is no configuration file given, SE will try to read ’default.sex’ from the local directory. However, the parameter values can be fed to SE on the command line as well: sex image -c configuration file.txt -PARAMETER1 value1 -PARAMETER2 value2 The names of the parameters and their meanings and preferred values are discussed below. NOTE: if you use both a configuration file and command line parameter input, the command line input takes precedence over the configuration file value. 6.2 Using SE on separate images for detection and photometry This may sound weird but the option in SE to find all the objects in one image and then apply the apertures and positions found on another image can be quite useful. To use image1 for the detection
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68 CHAPTER 8: OUTPUT PARAMETERS Nam
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70 CHAPTER 8: OUTPUT PARAMETERS Fig
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72 CHAPTER 8: OUTPUT PARAMETERS 2 T
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74 CHAPTER 8: OUTPUT PARAMETERS hav
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76 CHAPTER 8: OUTPUT PARAMETERS
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78 CHAPTER 9: STRATEGIES FOR SE USE
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84 CHAPTER 10: AVAILABLE PACKAGES
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86 CHAPTER 11: FOLLOW-UP PROGRAMS
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88 CHAPTER 12: SE USE IN THE LITERA
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90 CHAPTER 12: SE USE IN THE LITERA
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92 CHAPTER 13: KNOWN BUGS AND FEATU
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94 CHAPTER 14: SE PARAMETER ADDITIO
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96 CHAPTER 15: EXAMPLES 15.2 Runnin
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98 CHAPTER 15: EXAMPLES 1 0.8 0.6 0
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100 CHAPTER 16: ACKNOWLEDGMENTS
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102 CHAPTER A: ’DRIZZLE’ AND RM
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104 CHAPTER B: SE PARAMETERS MAG_GA
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106 BIBLIOGRAPHY Fasano, G. and Fil
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108 INDEX Trujillo, I., Aguerri, J.
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110 INDEX DELTAPEAK B1950, 60 DELTA
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112 INDEX XPSF IMAGE, 73 XPSF WORLD
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