Figure 1 : Phased I-band light curves of blue large-amplitude pulsators (BLAPs) detected by the OGLE survey.

From: Blue large-amplitude pulsators as a new class of variable stars

Figure 1

Period, P, is given for each object. The light curve shapes of the new variables are remarkably similar to the shapes of δ Sct, RR Lyrae and δ Cep-type stars pulsating in the fundamental mode, but those have much longer periods.