GCN Circular 39309
Subject
EP250212a: Liverpool Telescope optical upper limits
Date
2025-02-13T08:45:55Z (10 days ago)
From
Rob Eyles-Ferris at U of Leicester <raje1@leicester.ac.uk>
Via
Web form
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.