fix data use in plot_lc
fix data use in plot_lc

kbarbary/sncosmo,dannygoldstein/sncosmo,sncosmo/sncosmo,sncosmo/sncosmo,kbarbary/sncosmo,sncosmo/sncosmo,dannygoldstein/sncosmo,dannygoldstein/sncosmo,kbarbary/sncosmo