{
  "bibcode": "2020GCN.26772....1Z",
  "body": "Z.P. Zhu, D. Xu, X. Liu, B.Y. Yu, Y. Ma (NAOC), X. Gao (Urumqi No.1 \nSenior High School) report:\n\nWe observed the field of GRB 200115A (Cenko et al., GCN 26771) using the \n0.6m NEXT telescope located at Nanshan, Xinjiang, China. Observations \nstarted at 12:11:17 UT on 2020-01-15 (i.e., 20.9 min after the BAT \ntrigger), and a series of 300 s R-band frames have been obtained. \nObservations are ongoing.\n\nNo optical transient is detected in the Swift BAT's error circle from \ninitial frames, down to a limiting magnitude of m(R) ~ 20.0, calibrated \nwith the nearby SDSS field.",
  "circularId": 26772,
  "createdOn": 1579092993000,
  "email": "dxu@nao.cas.cn",
  "subject": "GRB 200115A: Nanshan-0.6m optical upper limit",
  "submitter": "Dong Xu at NAOC/CAS  <dxu@nao.cas.cn>",
  "eventId": "GRB 200115A"
}