{
  "format": "text/plain",
  "createdOn": 1730296202994,
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Chao Wu at NAOC <cwu@nao.cas.cn>",
  "editedOn": 1730304756038,
  "bibcode": "2024GCN.37970....1S",
  "eventId": "GRB 241030A",
  "submittedHow": "web",
  "submitter": "Chao Wu at NAOC <cwu@nao.cas.cn>",
  "subject": "GRB 241030A: SVOM/C-GFT optical observations",
  "version": 2,
  "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 241030A detected by Fermi/GBM (Fermi GBM team, GCN 37955) and Swift/BAT (Klingler et al., GCN 37956) on 2024-10-30T09:54:53 UT, ~ 4.09 hr 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 30s. The counterpart (Dichiara et al. GCN 37956, Watson et al., GCN 37957;  Fernández-Rodríguez et al., GCN 37958; Zheng et al., GCN 37959; An et al., GCN 37960; Higuchi et al., GCN 37963, Qiu et al., GCN 37965, Lin et al. GCN 37966) was clearly detected in band g,r and i. The results are,\n\n(T-T0)_mid（sec)      mag     mag_err  band\n-------------------------------------\n14825          17.50    +/- 0.07  i \n14935          18.01    +/- 0.12  g \n15143          17.84    +/- 0.09  r \n\nThe photometry was calibrated with nearby PS1 star.\n\nWe thank the observation assistant Bowen Li and Guangsheng Zhang at Jilin observatory for their excellent support.\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",
  "circularId": 37970
}