{
  "bibcode": "2014GCN.15858....1L",
  "body": "A. LaCluyze, J. Haislip, D. Reichart, A. Trotter, S. Poshyachinda, W. \nRujopakarn, A. Foster, N. Frank, K. Ivarsen, J. Moore, M. Nysewander, R. \nBeauchemin, T. Berger, M. Carroll, H. T. Cromartie, R. Egger, M. \nHinckle, A. Ireland, M. Maples, L. Scott, and J. A. Crain report:\n\nSkynet continued observing the Swift-BAT localization of GRB 140215A \n(Markwardt et al., GCN 15837, Swift trigger 586680) with six of the \nPROMPT telescopes located at CTIO in Chile.  LaCluyze et al. (GCN 15840) \ndescribed rapid-response observations of a fading optical afterglow \ntaken between ~1m and 6.5m after the burst in BVRI and luminance, and \npresented a preliminary light curve calibrated to USNOB and NOMAD \ncatalog stars. A revised and recalibrated light curve, including \nobservations taken at t~20-24h, is at:\n\nhttp://www.skynet.unc.edu/grb/grb140215a_2.png\n\nIn stacks of ~45x160s images from the second night, we do not detect the \nafterglow with any degree of confidence (the I-band \"detections\" in the \nlight curve plot are most likely spurious.) The 3-sigma limiting \nmagnitudes are:\n\nBand      tmid      Limit\nI         21.9h     >20.2\nR         21.0h     >20.5\nV         21.8h     >20.5\nB         21.7h     >20.3\n\nMagnitudes are in the Vega system, and were calibrated to 4 APASS DR7 \ncatalog stars in the field. They have not been corrected for \nline-of-sight MW dust extinction corresponding to E(B-V)=0.09 (Schlegel \net al. 1998).\n\nNo further Skynet observations are scheduled.",
  "circularId": 15858,
  "createdOn": 1392738525000,
  "email": "atrotter@physics.unc.edu",
  "subject": "GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow",
  "submitter": "Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet  <atrotter@physics.unc.edu>",
  "eventId": "GRB 140215A"
}