| Adaptive
aperture photometry (3) |
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| • | Petrosian
magnitudes (Petrosian
1976) |
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| § | Find the
radius where the local surface brightness is a given |
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| fraction of
the average surface brightness within the enclosed |
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| disk, and use
it to scale the aperture. |
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| § | The most
accurate for resolved galaxies with good S/N |
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| § | Used by SDSS |
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