{
  "bibcode": "2019GCN.26059....1Z",
  "body": "Z.P. Zhu, B.Y. Yu, D. Xu (NAOC), X. Gao (Urumqi No.1 Senior High School) \nreport:\n\nWe observed the field of GRB 191019A (Simpson et al., GCN 26031) using \nthe 0.6m NEXT telescope located at Nanshan, Xinjiang, China. \nObservations started at 15:34:01 UT (i.e., 21.5 min after the BAT \ntrigger) and ended at 18:22:51 UT on 2019-10-19, and a series of 60 s, \n200 s, 300 s Sloan r-band frames were obtain in a high airmass.\n\nA source is detected in our images at the XRT position (Osborne et al., \nGCN 26043), which is already present in Pan-STARRS with m(r) = 19.12 +/- \n0.01. The source had m(r) = 18.96 +/- 0.10 at the beginning and decayed \nto m(r) = 19.19 +/- 0.10 in about an hour. Because the flux difference \nis small and observations were carried out in high airmass, it's not \nclear if there is a GRB afterglow contribution. Our measurements are in \nagreement with that by NOT (Perley et al., GCN 26039; Fynbo et al., GCN \n26041) and GROND (Guelbenzu et al., GCN 26042).",
  "circularId": 26059,
  "createdOn": 1571752733000,
  "email": "dxu@nao.cas.cn",
  "subject": "GRB 191019A: Nanshan-0.6m optical observations",
  "submitter": "Dong Xu at NAOC/CAS  <dxu@nao.cas.cn>",
  "eventId": "GRB 191019A"
}