{
  "bibcode": "2019GCN.24688....1X",
  "body": "L. P. Xin,  G. W. Li, R. S. Zhang,  T. C. Zheng, J. Wang,   J. Y. Wei,   Y. G. Yang, \nE. W. Liang,  X. G. Wang,   H. L. Li, X. H. Han,  X. M. Lu,  L. Huang,    H. B. Cai,   \nY. L. Qiu,  Y. Xu, Y.  J. Xiao, Y. T. Zheng,  C. Wu,   J. S. Deng,  D. W. Xu, \nD. Turpin, W. L. Dong, P. P. Zhang and Jirong Mao report:\n\nWe began to observe GRB 190530A (Fermi-GBM team, GCN 24676 ) with GWAC-F30cm telescope \nat 2019-05-30T12:48:46(UT), about 2.49 hour after the burst. GWAC-F30cm telescope is located at Xinglong\nobservatory, China. The field of view is about 1.9*1.9 sqr. deg. The coordinates  we used to make the \nobservations was derived from  Biltzinger et al., (GCN 24677). Due to the low elevation of this source\nat Xinglong observatory,  only seven R-band images were obtained. The exposure time for each frame\nwas 20 seconds. \n\nThe afterglow was detected by stacking all the images. \nThe coordinates is about RA=08:02:07.678  DEC=+35:28:47.14 J2000,\nconsistent with the position reported by Lipunov et al., GCN 24680. \nThe magnitude was R=15.1mag, calibrated by the nearby USNO R2 magnitudes.\n\nThis message my be cited.",
  "circularId": 24688,
  "createdOn": 1559266966000,
  "email": "xlp@nao.cas.cn",
  "subject": "GRB 190530A: GWAC-F30 optical detection",
  "submitter": "Liping Xin at NAOC, SVOM  <xlp@nao.cas.cn>",
  "eventId": "GRB 190530A"
}