{
  "bibcode": "2014GCN.16789....1X",
  "body": "D. Xu (DARK/NBI), X. Gao (Urumqi No.1 Senior High School, Xinjiang),\nG.-J. Feng, A. Esamdin, L. Ma (XAO), Z.-J. Xu (Nanjing Putian\nTelecommunications Co. Ltd., Jiangsu) report:\n\nWe observed the field of GRB 140907A (Krimm et al., GCN 16788) using\nthe 35cm robotic telescope and the 1m optical telescope located at\nNanshan, Xinjiang, China. The observations started at 16:18:42 UT on\n2014-09-07 at the 35cm telescope without any filter, and 16:34:28 UT\nat the 1m telescope in the R filter.\n\nThe afterglow is well detected in our images at coordinates\n\nR.A. (J2000) = 03:12:34.98\nDec. (J2000) = +46:36:17.2\n\nError radius: ~ 0.7 arcsec\n\nwhich is fully consistent with the UVOT position. Generally, the\nafterglow has been decaying, and follows are the preliminary\nmeasurements from the 35cm telescope:\n\n     Mid-Time              Mag\n2014/09/07.68001     16.7\n2014/09/07.68083     16.7\n2014/09/07.68164     16.7\n2014/09/07.68244     16.9\n2014/09/07.68325     17.0\n2014/09/07.68405     17.1\n2014/09/07.68485     17.0\n2014/09/07.68565     16.9\n2014/09/07.68646     17.2\n\nwith a typical error of 0.2 magnitude, calibrated with the R-band\ncatalog of NET CMC-14.\n\nObservations are ongoing.",
  "circularId": 16789,
  "createdOn": 1410113034000,
  "email": "dong.dark@gmail.com",
  "subject": "GRB 140907A : Optical observations from Nanshan",
  "submitter": "Dong Xu at DARK/NBI  <dong.dark@gmail.com>",
  "eventId": "GRB 140907A"
}