{
  "bibcode": "2018GCN.23341....1M",
  "body": "E. Mazaeva (IKI),  S. Belkin (IKI),  A. Pozanenko (IKI), R. Inasaridze \n(AbAO), V. Ayvazian  (AbAO),  O. Kvaratskhelia (AbAO), G. Kapanadze (AbAO), \nA. Volnova  (IKI),  I. Molotov (KIAM) report on behalf of larger GRB \nfollow-up collaboration:\n\nWe observed the field of the Swift GRB 181013A (D'Avanzoet al., GCN 23332) \nwith AS-32 (0.7m) telescope of Abastumani Observatory starting on  Oct. 13 \n(UT) 15:23:15 .   We do not detect any object within  XRT position (Osborne \net al., GCN 23334). Preliminary  photometry of the field is following:\n\nDate              UT start     t-T0            Filter Exp.   OT    Err. UL\n                                        (mid, days)         (s)\n\n2018-10-13 15:23:15    0.54312    R      58*60  n/d   n/d  21.0\n\nThe photometry is based on nearby SDSS-DR12 stars\nSDSS-DR12_id R(Lupton)\nJ135025.82+400818.8 16.99\nJ135102.99+401021.5 16.36\nJ135015.70+400244.5 13.69\nJ135009.92+400351.8 13.87\nJ135009.71+400308.0 14.87",
  "circularId": 23341,
  "createdOn": 1539626671000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 181013A: AbAO optical upper limit",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 181013A"
}