{
  "bibcode": "2017GCN.21393....1C",
  "body": "A. J. Castro-Tirado (IAA-CSIC Granada & ISA-UMA M��laga), A. \nGonz��lez-Rodr��guez, Y. Hu, R. Cunniffe, J. C. Tello, B.-B. Zhang \n(IAA-CSIC Granada), A. Castell��n, I. Carrasco (UMA M��laga), M. Jel��nek \n(ASU-CAS Ondrejov), S. Guziy (Nikolaev Univ.), S. B. Pandey (ARIES \nNainital), S. Jeong (SKKU Seoul), M. D. Caballero-Garc��a (ASU-CAS \nPrague), M. Wildi (Vermes Obs.) and P. Kub��nek (IP-ASCR Prague), on \nbehalf of a larger collaboration, report:\n\nFollowing the detection of GRB 170728B by Swift (Cenko et al. GCNC \n21371), the TELMA 0.6m robotic telescope at the BOOTES-2 astronomical \nstation at IHSM/UMA-CSIC in M��laga (Spain) pointed to the GRB location \n26 sec after the notice time and 40 sec after trigger time, i.e. at \n23:03:59 UT on July 28.\n\nThe first exposures (3 sec, unfiltered) were taken simultaneously to the \nextended gamma-ray emission phase (Stanbro et al. GCNC 21383, Ukwatta et \nal. GCNC 21384), confirming the optical transient within the Swift/XRT \nerror box (D'Elia et al., GCNC 21376) being coincident with the optical \nafterglow position (D'Avanzo et al. GCN 21373) with magnitudes in the \nrange reported by Lipunov et al. (GCNC et al. 21391) starting 2 sec \nafter. A detailed analysis is ongoing.\n\nThis message can be quoted.\n\n[GCN OPS NOTE(31jul17):  Per author's request, the date was corrected\nfrom \"July 2\" to \"July 28\"]",
  "circularId": 21393,
  "createdOn": 1501434039000,
  "email": "ajct@iaa.es",
  "subject": "GRB 170728B: BOOTES-2/TELMA optical detection during the extended gamma-ray phase",
  "submitter": "Alberto Castro-Tirado at Inst.de Astro. de Andalucia  <ajct@iaa.es>",
  "eventId": "GRB 170728B"
}