{
  "createdOn": 1792999959891,
  "submitter": "damien dornic <damiendornic@gmail.com>",
  "format": "text/plain",
  "eventId": "GRB 261026A",
  "eventType": [
    "GRB",
    "X-ray Transient",
    "Optical Transient"
  ],
  "submittedHow": "web",
  "subject": "GRB 261026A: SVOM/COLIBRÍ (FM-GFT) optical observations",
  "body": "Damien Dornic (CPPM), Diego López-Cámara (UNAM), Stéphane Basa (UAR Pytheas), William H. Lee (UNAM), Edilberto Aguilar-Ruiz (UNAM), Camila Angulo (UNAM), Jean-Luc Atteia (IRAP), Dalya Akl (NYUAD), Sarah Antier (IJCLAB), Rosa L. Becerra (UNAM), Nathaniel R. Butler (ASU), Jean-Grégoire Ducoin (CPPM), Francis Fortin (IRAP),  Leonardo García-García (UNAM), Ramandeep Gill (UNAM), Noémie Globus (UNAM), Marion Guelfand (CPPM), Asuka Kuwata (UNAM), Massimiliano Lincetto (CPPM), Nikos Mandarakas (LAM), Francesco Magnani (CPPM), Enrique Moreno Méndez (UNAM), Margarita Pereyra (UNAM), Fredd Sánchez Álvarez (UNAM), Benjamin Schneider (LAM), Antonio de Ugarte Postigo (LAM),  Alan M. Watson (UNAM), Hatsune Goto (RIKEN/CEA), Clara Plasse (HKU), Wenjin Xie (NAOC), Chao WU (NAOC), Chenwei Wang (IHEP) report:\n\nWe imaged the field of the SVOM GRB 261026A (Goto et al., GCN Circ. 46030) using the DDRAGO wide-field imager on the SVOM/COLIBRÍ (FM-GFT) telescope. We observed from 2026-10-26T06:11:22.748 to 2026-10-26T06:23:45.890 UTC (from 115 to 858 seconds after the trigger) and obtained 100 seconds of exposure in the r filter.\n\nThe data were reduced and coadded with the COLIBRI pipeline. The photometry was calibrated using nearby stars from the PanSTARRS DR1 catalog, is in the AB system, and is not corrected for Galactic extinction.\n\nWe detect an uncatalogued source revealed by image subtraction using Legacy Survey as template and consistent with the ECLAIRs error circle (Goto et al., GCN Circ. 46030) at: \nRA(J2000) = 22:29:24.760 = 337.3531676 degrees\nDec(J2000) = +27:01:34.600 = 27.0262778 degrees\nwith an uncertainty of 0.5 arcsec.\n\nThe preliminary magnitude derived for that source is:\nr = 18.79 +/- 0.05\n\nWe encourage further observations.\n\nWe thank the staff of the Observatorio Astronómico Nacional at Sierra de San Pedro Mártir, as well as the technical and engineering teams at CEA, CPPM, IRAP, LAM, OHP, OSU Pytheas, and UNAM.\n\nCOLIBRÍ is an astronomical observatory developed and operated jointly by France (AMU, CNES and CNRS) and Mexico (UNAM and SECIHTI). It is located at the Observatorio Astronómico Nacional on the Sierra de San Pedro Mártir, Baja California, Mexico.\n",
  "circularId": 46033
}