{
  "bibcode": "2013GCN.14914....1C",
  "body": "M. Carroll, A. Trotter, J. Hailslip, D. Reichart, A. LaCluyze, K. McLin, \nL. Cominsky, A. Smith, D. Caton, L. Hawkins, T. Berger, H. T. Cromartie, \nR. Egger, A. Foster, C. Foster, N. Frank, K. Ivarsen, D. James, M. \nMaples, J. Moore, M. Nysewander, E. Speckhard, P. Taylor and J. A. Crain \nreport\n\nSkynet observed the Swift XRT localization of the field of GRB 130612A \n(Racusin et al., GCN 14874, Swift trigger #557976), beginning at \n2013-06-12, 3:23:27 UT (t=70s post-trigger), and continuing until t~5h, \nusing three 16\" telescopes of the PROMPT array at Cerro Tololo, Chile \n(BVI bands), the 14\" GLAST Optical Robotic Telescope (GORT) at the Hume \nObservatory in California (RcIc bands), and the 14\" telescope at the \nAppalachian State University Dark Sky Observatory (DSO-14) in Pisgah \nNational Forest, North Carolina (RI bands). It took a total of ~500 \nexposures ranging from 10s to 160s.\n\nAs we reported in Trotter et al. (GCN 14877), we detect a fading \nafterglow in the B, V and I bands out to t~1h at a position consistent \nwith the detections of Racusin et al. (GCN 14874), Melandri, Mundell & \nGomboc (GCN 14875), and Morgan (GCN 14876). In stacked images we obtain \nfurther detections in the V band at t=3.2h, and in the I band at t=1.5h \nand 1.9h.  The afterglow fades with an approximate temporal index \nalpha~-0.9.\n\nA preliminary light curve is at:\nhttp://skynet.unc.edu/grb/grb130612a_2.png\n\nMagnitudes are in the Vega system, calibrated to 4 APASS stars in the \nfield.  No correction has been applied for the expected line-of-sight \nMilky Way extinction E(B-V)=0.076 (Schlegel et al. 1998).\n\nNo further Skynet observations are scheduled.",
  "circularId": 14914,
  "createdOn": 1371510849000,
  "email": "atrotter@physics.unc.edu",
  "subject": "GRB 130612A: Continued Skynet/PROMPT/GORT/DSO observations",
  "submitter": "Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet  <atrotter@physics.unc.edu>",
  "eventId": "GRB 130612A"
}