Example of multiple UVOT images in which our pipeline detected an asteroid. In the template image, no asteroid is observed. In the two science images, which were taken a few hours apart, a source appears at different positions, indicated by the red arrows. Our pipeline detected the source in both images as two separate transients, with both having used the left image as the template for the image subtraction. This source was matched using the SkyBot database to the known object Alleghenia 457. All images were in the field of the known AGN PMNJ0948+0022 and taken in the U filter. The ObsIDs and extension numbers for the three images are, from left to right: 00031306073[1], 00031306074[1], 00031306074[2]. The exposures in the images began, from left to right, on 13 November 2021 at 05:54:39, 20 November 2021 at 16:21:55, and 20 November 2021 at 19:43:05. All three images are 2.5′ × 2.5′. North is up and east is to the left.