GCN Circular 41669
Subject
EP250827b: continued Liverpool Telescope observations
Event
Date
2025-09-03T12:19:38Z (21 days ago)
From
Rob Eyles-Ferris at U of Leicester <raje1@leicester.ac.uk>
Via
Web form
R. A. J. Eyles-Ferris and R. L. C. Starling (U of Leicester) report on behalf of a larger collaboration:
We observed the position of EP250827b/AT 2025wkm (Schroeder et al., GCN 41635) with the 2m Liverpool Telescope using the IO:O instrument. We obtained a series of exposures in the SDSS u’g’r’i’z’ filters starting at 2025-09-03 01:45:07 UT, approximately 162.5 hours after the X-ray detection.
We performed image subtraction on the stacked g’r’i’z’ images using reference images from Pan-STARRS. AT 2025wkm is clearly detected in all our subtractions and appears to be currently rising in all bands. We measure r’ = 19.90 +/- 0.05, calibrated to Pan-STARRS and not corrected for Galactic extinction, which corresponds to an absolute magnitude of -18.91 adopting the redshift of 0.120 of Sevilla and Ho (GCN 41639). We note no significant change in colour (g’ - r’ ~ 0) when compared with our earlier epoch photometry (Eyles-Ferris and Starling, GCN 41655).
Further observations are planned.