Notes. The host galaxies are the primary names as catalogued now in NED. Spectroscopically classified events are noted, and “Probable SN” means the light curve points we have are consistent with it being an unrelated supernova. There are two objects in the nearby galaxy NGC 253, which are certain variable stars in the outskirts of the disc (labelled VS in the table). The final column gives the 2D skymap probability contour within which the transient position lies. Some of the sources are not in the redshift range of the GW event (i.e. 0.046−0.068). A machine-readable file with all photometry for these candidates is available at the CDS. ⁽¹⁾Discovered by DECam-Growth: DG19hqpgc. ⁽²⁾Classified by Rodriguez et al. (2019). ⁽³⁾Offset by 38 from galaxy WISEA J005605.37-243830.5, but coincident with faint uncatalogued stellar source. ⁽⁴⁾Discovered by DECam-Growth: DG19wxnjc. Classified by Gomez et al. (2019b), De et al. (2019a), and Jonker et al. (2019). ⁽⁵⁾Discovered by DECam-Growth: DG19wgmjc. Classified by Tucker et al. (2019a). ⁽⁶⁾Discovered by DECam-Growth: DG19xczjc. ⁽⁷⁾Discovered by DECam-Growth: DG19gcwjc. Classification reported in Wiesner et al. (2019a), but no redshift given.