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LAT Light Curve Analysis: Aperture Photometry and ... - Fermi - NASA

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R. Corbet<br />

<strong>Aperture</strong> <strong>Photometry</strong><br />

The simplest form of photometry is aperture<br />

photometry.<br />

You just measure the flux collected inside a<br />

particular region of the sky.<br />

This is originally done with optical telescopes by<br />

using a physical aperture (e.g. a hole in a piece<br />

of metal).<br />

Now, with imaging instruments, it is possible to<br />

use a software defined aperture.<br />

COSPAR CBW 2010<br />

4

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