{
  "bibcode": "2007GCN..6981....1H",
  "body": "Veli-Pekka Hentunen (Taurus Hill Observatory, Varkaus, Finland) reports to \nthe AAVSO International High Energy Network the following optical \nobservations of GRB071020 (GCN #6949, Holland et al.):\n\nMarkku Nissinen, Henri Taino and Veli-Pekka Hentunen report the detection \nof the optical afterglow of GRB 071020 (Holland et al., GCN 6949; Schaefer \net al., GCN 6948; Yuan et al., GCN 6951; Xin et al., GCN 6956). The \nafterglow was observed unfiltered approximately 17 hours post-burst, using \na 0.3-meter Meade LX200 at Taurus Hill Observatory.  The source was \ndetected with marginal signal to noise at an unfiltered magnitude of 20.9 \n+/- 0.3, with an observational mid-point time of 2007 October 20, 23:54:37 \nUT.  The magnitude is calibrated relative to GSC 0247201072 (GSC1.2) with \na magnitude of 13.54.  The afterglow magnitude is consistent with an \nearlier observation by Xin et al. (GCN 6956) as well as with a later \nobservation by Im et al. (GCN 6970).\n\nThe AAVSO thanks the Curry Foundation for their continued support of the\nAAVSO International High Energy Network.\n\n[GCN OPS NOTE(23oct07): Per submiter's request, \"6979\" was changed to \"6949\"\nin th 3rd line.]",
  "circularId": 6981,
  "createdOn": 1193138746000,
  "email": "matthewt@aavso.org",
  "subject": "Optical observations of GRB 071020",
  "submitter": "AAVSO GRB Network at AAVSO  <matthewt@aavso.org>",
  "eventId": "GRB 071020"
}