{
  "createdOn": 1735614557662,
  "circularId": 38736,
  "eventId": "EP241217A",
  "submitter": "lijj328@mail2.sysu.edu.cn",
  "bibcode": "2024GCN.38736....1L",
  "body": "Jin-Ji Li, Zhong-Nan Dong, Wei-Sen Huang, Jia-Qi Lin, Pu Lin, Hao-Nan Yang, Yan Yu, Hao-Ran Zhang, Rong-Feng Shen, Bin Ma (Sun Yat-sen University) report on behalf of the SYSU 80cm telescope team:\n\nWe observed the field of the fast X-ray transient EP241217A (Zhou et al., GCN 38586), which was also detected by Swift-XRT (Williams et al., GCN 38596), using the Sun Yat-sen University 80cm telescope, with 130 × 20 s exposures in J band. Our observations began at 2024-12-18 17:51:36 UTC, 36.26 hours after the EP trigger. \n\nWe did not detect any counterpart in the stacked images at the position of the optical afterglow (Levan et al., GCN 38587; Izzo et al., GCN 38588; Fan et al., GCN 38592; Jin et al., GCN 38607; Mohan et al., GCN 38612; Zhu et al., GCN 38613; Bochenek et al., GCN 38615; Liu et al., GCN 38636), down to a 5-sigma depth of J ~ 17.8 Vega magnitudes.\n",
  "submittedHow": "web",
  "format": "text/plain",
  "subject": "EP241217A: J band upper limit by SYSU 80cm telescope"
}