Navigate to <https://skynet.unc.edu/astr101l/graph-legacy/>\
Click this dropdown.

Curve
Moon
Venus
Variable
Scatter
Spectrum
Dual
Gravity Pro
Radio
Cluster Pro Plus
Pulsar
Transient

Click "Upload Data File"\
Upload the .csv you downloaded in the previous part of the assignment.

Remember what number Afterglow assigned your variable star when you clicked on it? You wrote it down. Choose that number in the dropdown next to "Select Variable Star". For me it was 0.

Go back to the finder chart in your assignment. There is an apparent magnitude listed for the reference star. Copy that.

Semester: Northern-Hemisphere Fall (Southern-Hemisphere Spring)
Globular Cluster: NGC 1261
Reference Star’s Apparent Magnitude: 13.87

(enlarge)

Semester: Northern-Hemisphere Spring (Southern-Hemisphere Fall)
Globular Cluster: NGC 3201
Reference Star’s Apparent Magnitude: 13.60

(enlarge)

Semester: Northern-Hemisphere Summer (Southern-Hemisphere Winter)
Globular Cluster: M28
Reference Star’s Apparent Magnitude: 12.98

(enlarge)

Paste that number into the "Reference Star Actual Mag:" field.

Give your chart a useful title. We are graphing brightness over time.

Label your x and y axes. X is time, Y is how bright the star is.

Check that you are happy with your labels.

Click "Save Graph." It will save to your computer.\
Insert this graph into your assignment.

Plotting Tool: Graph the Change in Brightness - old tool