GCN Circular 45016
Subject
EP260618a: Liverpool Telescope optical observations
Event
Date
2026-06-20T14:22:19Z (25 days ago)
From
A. Bochenek at Liverpool John Moores University <a.m.bochenek@2023.ljmu.ac.uk>
Via
Web form
A. Bochenek, D. A. Perley (LJMU), report:
We observed the field of EP260618a (Yang et al., GCN 44978; Jiang et al., GCN 44991) using the IO:O optical camera on the 2m robotic Liverpool Telescope. We obtained 6x150s exposures in SDSS griz filters, starting at 2026-06-19 02:32:19 UT, approximately 17.96 hours after EP trigger.
Some z-band exposures had to be discarded prior to stacking. We detect a source in the images in all filters at the position reported by Becerra et al. (GCN 44988), also Malesani et al. (GCN 44990), Amram et al. (GCN 44994) and He et al. (GCN 45012). The photometry is:
| MJD (mid) | T_mid-T_0 | Filter | Mag. (AB) |
|---|---|---|---|
| 61210.11078 | 18.08 h | g | 22.47 ± 0.24 |
| 61210.12120 | 18.34 h | r | 22.03 ± 0.12 |
| 61210.13221 | 18.59 h | i | 21.62 ± 0.11 |
| 61210.14403 | 18.88 h | z | 21.48 ± 0.26 |
The photometry is in the AB magnitude system, was calibrated using nearby PanSTARRS secondary standards and was not corrected for extinction.