Light curves of the same RRab star with a period of 0.658936 days. The identifiers are 839368005575354240, 169841701110866261 and ZTF17aaajjtn, for Gaia DR2, Pan-STARRS1 DR2 and ZTF DR10, respectively. For Gaia, the observation in the G_BP filter is shown in blue circles and orange triangles for G_RP. For Pan-STARRS1 on the second panel, the filters ɡ_P1, r_P1, i_P1, z_P1, y_P1 are identified by green circles, red triangles, purple inverted triangles, brown squares, and gray diagonal crosses, respectively. For ZTF, g is shown in olive circles and r in cyan diamonds.