\chapter{Using {\sc SExtractor}}
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\chapter{Using {\sc SExtractor}}
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\label{chap:using}
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\label{chap:using}
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{\sc SExtractor} is run from the shell with the following syntax:
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{\sc SExtractor} is run from the shell with the following \index{syntax} syntax:
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\% ~ {\tt sex} ~ {\em image} {\tt [-c} {\em configuration-file}{\tt ]} ~ {\tt [ -}{\em Parameter1} {\em Value1\ }{\tt ]}
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\% ~ {\tt sex} ~ {\em \index{image} image} {\tt [-c} {\em configuration-file}{\tt ]} ~ {\tt [ -}{\em Parameter1} {\em Value1\ }{\tt ]}
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~ {\tt [ -}{\em Parameter2} {\em Value2\ }{\tt ]} ...
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~ {\tt [ -}{\em Parameter2} {\em Value2\ }{\tt ]} ...
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The parts enclosed within brackets are optional. The file names of input
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The parts enclosed within brackets are optional. The file names of input
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catalogues can be directly provided in the command-line, or in lists that are
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catalogues can be directly provided in the command-line, or in lists that are
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ASCII files with
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ASCII files with
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each catalogue name preceded by
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each catalogue name preceded by
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'@' (one per line).
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'@' (one per line).
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% Lists are ASCII files containing the input file names (one per line).
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% Lists are ASCII files containing the input file names (one per line).
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One should use lists instead of the catalogue file names if the number of
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One should use lists instead of the catalogue file names if the number of
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input catalogues is too large to be handled directly by the shell.
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input catalogues is too large to be handled directly by the shell.
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Any ``{\tt -}{\em Parameter} {\em Value}" statement in the command-line overrides
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Any ``{\tt -}{\em Parameter} {\em Value}" statement in the command-line overrides
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the corresponding definition in the configuration-file or any default
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the corresponding definition in the configuration-file or any default
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value (see below).
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value (see below).
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