GCN Circular 38613
Subject
EP241217a: NOT optical observations
Date
2024-12-18T10:46:03Z (23 days ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
Via
Web form
Z.P. Zhu, X. Liu, D. Xu (NAOC), J.P.U. Fynbo (DAWN/NBI), A. Amanda Djupvik (NOT) report on behalf of a large collaboration:
We observed the field of EP241217a detected by Einstein Probe (EP, Zhou et al., GCN 38586), using the StanCam instrument mounted on the Nordic Optical Telescope (NOT), with 9 x 180 s in the R band. Observations started at 19:14:21 UT on 2024-12-17, i.e. 13.6 hr after the trigger.
The previously reported optical counterpart (Levan et al., GCN 38587 & 38593; Izzo et al., GCN 38588; Fan et al., 38592; Jin et al., GCN 38607) is clearly detected in our stacked image, with a preliminary magnitude of R ~ 20.5 mag (AB), calibrated with nearby PanSTARRS stars and not corrected for Galactic extinction.