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Lightcurves, Spectra, and Images

Try this!

Look at the following pictures and graphs.


wavelength vs. intensity for Spica, the Sun, and Antares


flux vs. RXTE mission day

The grey points and line indicate the average flux.


Hydra A

Answer the following questions based on the above graphs and picture.

  1. Which of the above is a light curve?

  2. Which of the above used the Chandra X-ray Observatory in order to gather the data?

  3. In graph A, what is the highest intensity recorded?

  4. In graph B, what is the average flux, in counts/sec/SSC, at day 3116?

  5. Graph A uses what units for its measurement of wavelength?

This activity was developed by Kim Cochrane, Bowie High School, Bowie Maryland.

If words seem to be missing from the articles, please read this.

Imagine the Universe! is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center.

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Project Leader: Dr. Barbara Mattson
Curator: Meredith Gibb
Responsible NASA Official: Phil Newman
All material on this site has been created and updated between 1997-2014.
This page last updated: Monday, 17-Sep-2007 12:02:59 EDT