TITLE: GCN CIRCULAR NUMBER: 38801 SUBJECT: EP250101a: Liverpool Telescope optical upper limit DATE: 25/01/03 16:39:44 GMT FROM: A. Bochenek at Liverpool John Moores University <a.m.bochenek@2023.ljmu.ac.uk> A. Bochenek and D. A. Perley (LJMU) report: We observed the field of the fast X-ray transient EP250101a (Liang et al., GCN 38778) using the IO:O optical camera on the 2m robotic Liverpool Telescope. We obtained 6x200s exposures in the SDSS i’ filter starting at 2025-01-02 22:39:43 UT, approximately 1.7 days after the trigger. Four of the images had to be discarded due to autoguider issues. We do not detect any new sources in the EP/WXT confidence region (Liang et al., GCN 38778). The 3-sigma limiting magnitude on the stacked images is i > 21.6 mag, calculated using the nearby PanSTARRS secondary standards as reference. The photometry was not corrected for extinction. View this GCN Circular online at https://gcn.nasa.gov/circulars/38801. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...