GCN Circular 43875

Subject

EP260227a: Liverpool Telescope observations

Event

EP260227a

Date

2026-02-28T10:29:52Z (12 days ago)

From

Rob Eyles-Ferris at U of Leicester <raje1@leicester.ac.uk>

Via

Web form

R. A. J. Eyles-Ferris and N. R. Tanvir (Leicester) report on behalf of a larger collaboration:

We observed the field of EP260227a (Wang et al., GCN 43869

) with the 2m Liverpool Telescope on La Palma using the IO:O instrument. We obtained 6x150s exposures in each of the SDSS g’ r’ i’ z’ filters starting at 2026-02-28 04:25:03 UT, approximately 8.21 hours after the X-ray detection.

We detect the optical counterpart (Eyles-Ferris et al., GCN 43867

; Li et al., GCN ; Fu et al., GCN ; Mandarakas et al., GCN ) in the r’, i’ and z’ bands. We measure the following magnitudes calibrated to Pan-STARRS and not corrected for Galactic extinction.

t_mid (hours)	Filter	AB magnitude
8.35	g’	>22.28 (3-sigma)
8.63	i’	21.12 +/- 0.08
8.92	r’	21.61 +/- 0.22
9.21	z’	20.74 +/- 0.11

Compared to the photometry tabulated by Fu et al. (GCN 43873

) and Mandarakas et al. (GCN ), our observations suggest the source has not faded significantly between these three epochs.