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Activity 1: Using Timing Data to Understand Periodic Sources. We learn about systems that vary periodically with time by studying data collected from the same source over time (many times the period of the pattern). Data is displayed in the form of a lightcurve. A lightcurve has time as its X-axis (units of seconds, hours, or days, for example) and some measure of brightness, intensity or counts received as the Y-axis. What we can learn from a lightcurve, and what does the lightcurve from a periodic source look like? In this guided activity, you will learn how to use Hera's suite of timing analysis tools to find the orbital period of a system where a rotating neutron star is in orbit with a supergiant B star. But before starting, try these exercises to help familiarize you with periodic sources you may see in everyday life. Exploration of Periodic Sources in Everyday Life
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