{
  "subject": "EP260128a: Liverpool Telescope optical observations and possible counterpart",
  "eventId": "EP260128a",
  "submittedHow": "web",
  "body": "R. A. J. Eyles-Ferris and R. L. C. Starling (Leicester) report on behalf of a larger collaboration:\n\nWe observed the field of EP260128a (Zhou et al., GCN 43549) with the 2m Liverpool Telescope on La Palma using the IO:O instrument. We obtained 6x150s exposures in each of the SDSS r’ and SDSS g’ filters starting at 2026-01-28 23:56:39 UT, approximately 16.6 minutes after the X-ray detection.\n\nWe performed image subtraction on the stacked images using reference images from Pan-STARRS and Legacy DR11 and also compared the stacked and reference images manually. In the r’ stack and within the EP/FXT localisation, we tentatively identify a low significance source at a position\n\nRA 08:33:18.17 (128.32569 deg)\nDec -10:16:19.3 (-10.27202 deg)\n\nThe source is detected to ~2.6-sigma and we measure r’ = 22.92 +/- 0.38. The source is not visible in the g’ stack (started ~18 minutes later).\n\nWe derive 3-sigma upper limits for our stacked images of r’ > 22.8 and g’ > 22.5 with AB photometry calibrated to Pan-STARRS and not corrected for Galactic extinction.",
  "format": "text/plain",
  "circularId": 43553,
  "bibcode": "2026GCN.43553....1E",
  "createdOn": 1769679217316,
  "submitter": "Rob Eyles-Ferris at U of Leicester <raje1@leicester.ac.uk>"
}