Pre- and post-explosion light curves of SN 2019fmb. Left: Pre- and post-discovery (MJD = 58 615) Sloan-gri detections from the ZTF and PS-1 surveys of SN 2019fmb. Observations from different instruments are plotted with different symbols. The phases are relative to the brightest r-band point in the SN light curve. The deepest upper limits of the object in g-, r- and z-band filters from NOAO archival data of 2016 are marked with horizontal lines in the bottom-left corner. Right: Light curve of SN 2019fmb, with the detections by ATLAS also reported. As for SN 2019bxq, the SN has a short duration.