{
  "createdOn": 1764571389814,
  "format": "text/plain",
  "body": "L.B. He, J. An, S.Q. Jiang, X. Liu, Z.P. Zhu, D. Xu (NAOC), S.Y. Fu, A.D. Zhu, L. Lei, H.Z. Wu (HUST), J.Z. Liu (XAO) report on behalf of a large collaboration:\n\nWe observed the field of EP251130a (Wu et al., GCN 42903) using the 100B telescope of the JinShan project, located at Altay, Xinjiang, China. Obervations started at 2025-11-30 14:13:38 UT, i. e. 3.1 hrs post-burst, and a series of frames in g, r and i bands were obtained.\n\nThe previously reported optical counterpart candidate (Dornic et al., GCN 42904) was detected in our stacked i-band frame with a magnitude i = 20.60 +/- 0.18 at a mid-time 4.67 hrs post-burst. The magnitude was callibrated with nearby PanSTARRS1 dr2 catalog and without the Galactic extinction correction.\n\nWe acknowledge the excellent support from T.Q. Chen and J.F. Zhang for enabling these observations.",
  "subject": "EP251130a: JinShan optical observations",
  "submittedHow": "web",
  "circularId": 42914,
  "eventId": "EP251130a",
  "submitter": "L. B. He at NAOC <helb@bao.ac.cn>",
  "bibcode": "2025GCN.42914....1H"
}