{
  "submittedHow": "web",
  "bibcode": "2024GCN.35935....1J",
  "submitter": "Dong Xu at NAOC/CAS <dxu@nao.cas.cn>",
  "eventId": "EP240315a",
  "subject": "X-ray transient EP240315a: Nanshan/HMT optical upper limit",
  "createdOn": 1710658361112,
  "body": "S.Q. Jiang, Z.P. Zhu, X. Liu, J. An, S.Y. Fu, T.H. Lu, D. Xu (NAOC), X. Gao (Urumqi No.1 Senior High School), J.Z. Liu (XAO) report on behalf of a large collaboration:\n\nWe observed the field of EP240315a detected by Einstein Probe (EP, Zhang et al., GCN 35931) using the HMT-0.5m telescope located at Nanshan, Xinjiang, China. We obtained 30 x 90 s frames without any filter.\n\nNo uncatalogued optical transient is detected within or near the EP/WXT error circle, down to a limiting magnitude of r ~ 20.9 at a median time of 20.44 hr post-trigger, calibrated with the nearby PanSTAR field.\n\nThe previously reported ATLAS optical counterpart candidate, AT2024eju, (Srivastav et al., GCN 35932) is not present in the HMT co-added image, indicating that it has decayed significantly. Our non-detection is consistent with that from LT (Srivastav et al., GCN 35933). ",
  "circularId": 35935
}