{
  "body": "C. Adami (LAM), B. Schneider (MIT)， report on behalf of a larger collaboration:\n\nWe observed the field of GRB241030A (at a redshift of z=1.41) (Fermi GBM Team, GCN 37955, \nKlingler et al., GCN 37956; Beardmore et al., GCN 37962; Wang et al., GCN 37972; Pillera et al., \nGCN 37979; Ridnaia et al., GCN 37982; Ambrosi et al., GCN 37988; Wu et al., GCN 37997; Liang et \nal., GCN 38026; Watson et al., GCN 37957; Fernández-Rodríguez et al., GCN 37958; Zheng et al., \nGCN 37959; An et al., GCN 37960; Higuchi et al., GCN 37963; Qiu et al.,GCN 37965; Lin et al., \nGCN 37966; Wu et al., GCN 37970; Breeveld & Klingler, GCN 37974; Méndez-Lapido et al., GCN 37993;\nMoskvitin & Goranskij, GCN 38016; Busmann et al., GCN 38019; Schneider et al., GCN 38021; Li et \nal., GCN 38027; Masi, GCN 38031; Moskvitin et al., GCN 38032, Yan et al., GCN 38035, Liang et \nal., GCN38040) using the T193cm telescope at Observatoire de Haute-Provence (France) equipped \nwith the MISTRAL spectro-imager. A total of 70 min of exposure (7x600s) were obtained in the \nr-band starting at 03:46:29 UT on 2024-11-02 (~2.9 days after the trigger).\n\nThe optical counterpart is clearly detected on the stacked images, with the following \npreliminar magnitude: r = 21.9 +/- 0.1 mag (AB)\n\nThe photometric calibration was performed using nearby stars from the PanSTARRS catalog and \nthe magnitude is not corrected for Galactic extinction.\n\nWe acknowledge the excellent support from Observatoire de Haute-Provence and in particular \nStephane Favard for the MISTRAL observations.",
  "submitter": "Christophe Adami at LAM <christophe.adami@lam.fr>",
  "createdOn": 1730548537810,
  "circularId": 38041,
  "eventId": "GRB 241030A",
  "submittedHow": "web",
  "format": "text/plain",
  "bibcode": "2024GCN.38041....1A",
  "subject": "GRB241030A: OHP/T193 optical observations"
}