GCN Circular 37201
Subject
EP240816b: Liverpool Telescope optical follow-up observations
Date
2024-08-18T15:34:10Z (6 months 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 the X-ray transient EP240816b (Yang et al. GCN 37185) using the IO:O optical camera on the 2m robotic Liverpool Telescope. We obtained 5x150s exposures with the SDSS-R and SDSS-I filters between 2024-08-17 03:01:07 UT and 2024-08-17 03:29:10 UT, approximately 25.5 hours after the transient.
The images were stacked and the background was subtracted relative to Pan-STARRS reference imagining using PSF matching with the help of PSFEx. No uncatalogued optical source was detected within the 90% confidence 10 arcsec EP/FXT error-circle, nor within the 3.33 arcmin EP/WXT error circle. The 3-sigma limiting magnitudes on our stacked images are r > 22.2 mag and i > 21.8 mag.