{
  "bibcode": "2021GCN.30229....1M",
  "body": "A. S. Moskvitin and O. A. Maslennikova (SAO RAS),\nreport on behalf of the GRB follow-up team.\n\nWe observed the field of the GRB 210610A (Page et al., GCN #30160)\nwith the SAO RAS 1-m telescope Zeiss-1000 + CCD-photometer in Rc band\non June 11 and 12.\n\nWe clearly detected the GRB OT (Page et al., GCN #30160;\nHosokawa et al., GCNs #30161, #30169; Xu et al., GCN #30162;\nKumar et al., GCN #30163; Zhu et al., GCN # 30164; Lipunov et al.,\nGCN #30166; de Wet et al., GCN #30168; Horiuchi et al., GCN #30169;\nSun et al., GCN #30185; Watson et al., GCN #30191; Dutta et al.,\nGCN #30200; Zheng et al., GCN #30203, Kann et al., GCN #30211;\nBelkin et al., GCN #30214) in the stacked frame obtained\non June 11 and marginally detected the object in the stacked frame\nobtained on June 12.\n\nDate      UT_start  UT_end    Exp., s   T_mid-T0, d   R mag\nJune, 11  20:12:02--21:08:03   8 x 300  1.23356       22.43 +/- 0.14\nJune, 12  19:46:09--21:08:36  12 x 300  2.22477       23.3  +/- 0.3\n\nThe preliminary photometry is based on magnitudes of the nearby\nSDSS stars (transformed with the Lupton 2005 equations).\nThe OT magnitudes were not corrected for MW extinction.",
  "circularId": 30229,
  "createdOn": 1623590579000,
  "email": "mosk@sao.ru",
  "subject": "GRB 210610A: SAO RAS optical observations",
  "submitter": "Moskvitin Alexander at SAO RAS  <mosk@sao.ru>",
  "eventId": "GRB 210610A"
}