TITLE: GCN CIRCULAR NUMBER: 39309 SUBJECT: EP250212a: Liverpool Telescope optical upper limits DATE: 25/02/13 08:45:55 GMT FROM: Rob Eyles-Ferris at U of Leicester <raje1@leicester.ac.uk> R. A. J. Eyles-Ferris, P. T. O’Brien and R. L. C. Starling (U of Leicester) report: We observed the field of the X-ray transient EP250212a (Li et al., GCN 39308) with the 2m Liverpool Telescope using the IO:O instrument. We obtained 5x90s exposures in the SDSS g’ filter starting at 2025-02-10 20:59:11 UT and 5x90s exposures in the SDSS r’ filter starting at 2025-02-10 21:08:27 UT, approximately 13.3 hours after the X-ray detection. We performed image subtraction on the stacked images using reference images from Pan-STARRS. Consistent with Malesani et al., (GCN 39306), we identify no new sources within the error region of the EP/FXT candidate. We derive 3-sigma upper limits of g’ > 20.3 and r’ > 21.0 with photometry calibrated to Pan-STARRS and not corrected for Galactic extinction. View this GCN Circular online at https://gcn.nasa.gov/circulars/39309. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...