Short-time scale Fermi-LAT γ-ray light curves of PKS 0346−27 in May 2018. Top to bottom panels: six hour, three hour, and orbital (95 min) binning, respectively. Filled blue points represent significant detections, downward gray arrows represent 95% confidence level upper limits. The detection threshold is set at TS > 9 and F/ΔF >  2. For ease of representation, the length of the arrows has been set as equal to the average error for significantly detected bins in the corresponding light curve. The dashed blue lines represent the average flux considering only bins with significant detections.