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Post-process page (Source Extraction)
The Post-process page of the
Source
Extraction Properties configures precision measurements made by
the
Extract Sources command. These measurements are made
after the
Detection and
Filtering phases are completed.
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Post-process Properties
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Precision Centroid
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Check this box to compute a precision centroid
measurement. If this is not checked, the centroid is computed from
the pixels accrued by the
Detection phase, which must be above the
threshold setting. The precision
centroid gives the same results as using the interactive centroid
measurement. This measurement uses the general centroid settings on
the
Centroid Properties dialog.
Click [Setup] to
open the
Centroid Setup dialog.
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Precision FWHM
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Check this box to compute a precision measurement
of the Full Width at Half Maximum (FWHM) on all sources found by
the Detection phase. This measurement gives the same result as
using the interactive
FWHM measurement. Note that the precision FWHM
is extremely CPU intensive and will dominate the time spent in the
entire extraction process.
Click [Setup] to
open the
FWHM Properties dialog.
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Aperture Photometry
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Check this box to perform aperture photometry on
the list of sources. Aperture photometry reports the magnitude,
magnitude uncertainty, Signal to Noise ratio, Net Count, and local
aperture background for each source.
Click [Setup] to
open the
Aperture Photometry Setup dialog for setting
the aperture radii, ellipticity, orientation, and other Properties.
The aperture Properties are described for the
Aperture Tool.
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Detect Variability
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Check this box to detect sources that vary in
brightness among images in the image set. The threshold variability
is specified in the
Variability Properties dialog opened using the
[Setup...] button.
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Related Topics
Extract Sources command
Source
Extraction Properties
Aperture Photometry
Centroid Measurements
FWHM Measurements
Mira Pro x64 User's Guide, Copyright Ⓒ 2023 Mirametrics, Inc. All
Rights Reserved.
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