C46 Light Curve

You have discovered a Cepheid! Ferrarese et al. (1996) named this Cepheid C46. Below is their plot of C46's light curve. On Part I, Section B of your lab sheet, record the name of the Cepheid, its grid section number (47), its average apparent V magnitude (mv), and its period (P). (Careful: the numbers decrease going up the vertical axis!) When you're done, return to the main grid section 47 page to look for another Cepheid, or return to the main WF4 8x8 grid.

Finally, the prize! When you find a Cepheid, it relinquishes its light curve, and its period. The explanation of how to determine the physical parameters of the Cepheid from the light curve will be deferred until the demo of grid section 47 is finished. To complete the demo of grid section 47, go back to the "Nope" page to learn how to get the coordinates of an object.