Navigate to <https://skynet.unc.edu/astr101l/graph-legacy/>\
Get to the end of the previous assignment -- after uploading your .csv, selecting your variable star, and putting in the reference star magnitude.

Find the highest peak. Record the Period value, the x value (in this case 0.3304 -- it will be different for you).

In the Period (days) field, input the number you got from the previous step. For me this is .3304

You should start to see a trend in the data points.

Adjust the Period and Phase until the trend is a close to a clean line as you can get it, and you can easily see the highest and lowest points.

Give your graph a title. We are graphing brightness over period-folded time.

Label your axes. X is time, Y is brightness.

Type your name and save the graph. This will download the image to your computer, which you should enter into your assignment.

Find the highest point. Record the magnitude (brightness).\
In this case that number is 16.4043.

Find the lowest point. Record the magnitude (brightness).\
In this case that number is 16.9668.

Plotting Tool: Calculate the Change in Brightness - old tool