{
  "submittedHow": "web",
  "createdOn": 1729660215612,
  "circularId": 37841,
  "eventId": "GRB 241018A",
  "submitter": "Chao Wu at NAOC <cwu@nao.cas.cn>",
  "format": "text/plain",
  "bibcode": "2024GCN.37841....1S",
  "body": "SVOM/C-GFT team: Chao WU (NAOC), Zhe Kang (CHO), Liping Xin(NAOC), Xuhui Han(NAOC), Pinpin Zhang (NAOC), Xiaomeng Lu (NAOC), Zhenwei Li (CHO), You Lv (CHO), Ruosong Zhang (NAOC), Yujie Xiao(NAOC)\n\nSVOM JSWG: Jian-Yan Wei (NAOC), Bertrand Cordier (CEA), Shuang-Nan Zhang (IHEP), Stéphane Basa (LAM), Arnaud Claret (CEA), Zi-Gao Dai (USTC), Frédéric Daigne (IAP), Jin-Song Deng (NAOC),Olivier Godet (IRAP),  Andrea Goldwurm (APC), Diego Götz (CEA), Xu-Hui Han (NAOC), Cyril Lachaud (APC), En-Wei Liang (GXU), Yu-Lei Qiu (NAOC), Susanna Vergani (Obs.Paris), Jing Wang (NAOC), Chao Wu (NAOC), Li-Ping Xin (NAOC),  Shao-Lin Xiong (IHEP), Bing Zhang (UNLV)\n\n\nWe observed the field of GRB 241018A detected by SVOM (Atteia et al., GCN 37812 and Zheng et al. GCN 37831) on 2024-10-18T11:55:54 UT, 80 seconds after the trigger with C-GFT in the commissioning phase. A series of g, r and i band images were obtained with exposure time of 10s. In our refined processing, the optical counterpart reported by SVOM/VT (Qiu et al., GCN 37819, GCN 37826) and the NOT (Malesani et al., GCN 37821) was detected in our first sequence of coadded images of band g and r. The results are,\n\n(T-T0)_mid\tmag  \tmag_err  band\n-------------------------------------\n118 \t\t17.59  \t0.19  \t g\n193\t\t16.90   0.25     r\n\nThe photometry was calibrated with nearby PS1 stars.\n\nWe thank the observation assistant Guangsheng Zhang and Bowen Li at Jilin observatory for their excellent support.\n\n\n\nChinese Ground Follow-up Telescope of SVOM mission is located at Jilin, Changchun Observatory, National Astronomical Observatories, CAS. It has FOV of 1.28 deg x 1.28 deg with a 4k*4k CMOS detector mounted on the primary focus of 1.2-meter-aperure telescope.\n",
  "subject": "GRB 241018A: SVOM/C-GFT optical observations"
}