{
  "bibcode": "2018GCN.22404....1C",
  "body": "Changsu Choi, Myungshin Im (CEOU/SNU), Tae-Woo Kim, Wonseok Kang (KYSC), on\nbehalf of a larger collaboration.\n\n\nWe observed the field of GRB 180205A (Evans et al., GCN 22381) with the 1m\ntelescope of Deokheung Optical Astronomy Observatory (DOAO) in Korea,\nstarting from 2018/02/05 11:22:11 for three consecutive nights.\n\nWe obtained B, V, R-band images and clearly detected the afterglow in a\nseries of 300s exposure images. The afterglow in R band The afterglow is\ndimming at a rate of about 0.75 mag per day fon average rom 02/05 to 02/07\n(Evans et al., GCN 22381; Zheng et al. GCN 22382; Bolmer et al. GCN 22383;\nTanvir et al. GCN 22384; Volnova et al. GCN 22387; Falcon et al. GCN 22380;\nXin et al. GCN 22392; Zhu et al. GCN 22395; Emery et al. GCN 22396; Im et\nal., GCN 22397; Oksanen et al. 22401; Mazaeva et al., GCN 22403).\n\n\nDate UT mid Filter Exp. Mag(Vega) Err\n\n2018-02-05 11:14:41 R 300s 19.47 0.12\n\n2018-02-05 11:56:58 R 300s 19.48 0.08\n\n2018-02-06 12:04:55 R 1200s 20.38 0.05\n\n2018-02-06 14:07:30 R 1200s 20.29 0.04\n\n2018-02-07 12:20:31 R 1200s 20.88 0.06\n\n2018-02-07 13:57:28 R 1200s 21.14 0.07\n\n\nThe photometric calibration is based on the APASS stars within 6' radius\nfrom GRB. The observation is continuing.",
  "circularId": 22404,
  "createdOn": 1518097561000,
  "email": "mim@astro.snu.ac.kr",
  "subject": "GRB180205A: Optical observations with DOAO 1m telescope",
  "submitter": "Myungshin Im at Seoul Nat U  <mim@astro.snu.ac.kr>",
  "eventId": "GRB 180205A"
}