5. Observational Techniques

Data Analysis — Quiz

Test your understanding of data analysis with 5 practice questions.

Practice Questions

Question 1

In CCD photometry, what is the primary function of a weight map?

Question 2

Given the following brightness measurements with uncertainties: $10\pm2$, $12\pm3$, $11\pm1$, what is the weighted mean brightness?

Question 3

For a quantity $Z = X\,Y^2$ with independent uncertainties $\Delta X$ and $\Delta Y$, which expression gives the relative uncertainty $\Delta Z/Z$?

Question 4

What is the purpose of sigma-clipping in astronomical data analysis?

Question 5

Why might astronomers apply a Savitzky–Golay filter to time-series photometric data?