{
  "bibcode": "2016GCN.18960....1H",
  "body": "Veli-Pekka Hentunen, Markku Nissinen and Tuomo Salmi (Taurus Hill\nObservatory, Varkaus, Finland) report:\n\nWe have detected GRB 160131A optical afterglow at iTelescope observatory\n(Siding Spring, Australia) using T9  0.32-m f/9 RCOS telescope and T17 and \nT32  0.43-m f/6.8 astrographs. The observations were started at 2016-01-31 \n10:01:17 (UT). Several images using photometric R and V filters with 300 sec\nand 120 sec exposure time were taken.\n\nThe afterglow was detected at the position RA 05:12:40.34 and DEC\n-07:02:58.3.\n\nThe following magnitudes were obtained from the observations using\nNOMAD1 0829-0078536 (R=15.390 and V=14.820) as a comparison star:\n\nT32 observations\nTmid(s)+T0    Filter     Exp. time             Mag          Mag. Err.\n6197              V          300s                   15.05          0.04\n6796              V          300s                   15.17          0.04\n7395              V          300s                   15.28          0.04\n\nT17 observations\nTmid(s)+T0    Filter      Exp. time            Mag          Mag. Err.\n6651              R           4x300s              15.71          0.02\n7946              R           4x300s              15.96          0.02\n11649            R           4x300s              16.56          0.03\n12952            R           4x300s              16.68          0.03\n14244            R           4x300s              16.86          0.04\n15709            R           4x300s              16.99          0.04\n\nT9 observations\nTmid(s)+T0    Filter      Exp. time             Mag          Mag. Err.\n14761           V            5x120s              16.27          0.34\n15454           V            5x120s              16.43          0.37\n16190           V            5x120s              16.55          0.42\n17083           V            5x120s              16.55          0.44\n17767           V            5x120s              16.59          0.43\n18452           V            5x120s              16.65          0.48\n19179           V            5x120s              16.70          0.54\n20295           V            5x120s              16.75          0.56\n\n---\nThis email has been checked for viruses by Avast antivirus software.\nhttps://www.avast.com/antivirus",
  "circularId": 18960,
  "createdOn": 1454269966000,
  "email": "veli-pekka.hentunen@kassiopeia.net",
  "subject": "GRB 160131A: iTelescope optical observations",
  "submitter": "Veli-Pekka Hentunen at Taurus Hill Obs,A95  <veli-pekka.hentunen@kassiopeia.net>",
  "eventId": "GRB 160131A"
}