{
  "bibcode": "1997GCN.....8....1D",
  "body": "GRB971214 Optical Observations                                           #008\n\nA. Diercks, E.W. Deutsch, University of Washington, R. Wyse, The Johns\nHopkins University, G. Gilmore, Cambridge University, C. Corson,\nApache Point Observatory, F. Castander, University of Chicago, and\nE. Turner, Princeton University confirm the fading optical transient\nreported by Halpern et al. in IAU 6788.  We measure R.A. =\n11h56m26.35s Decl. = +65o12'0.7\" (equinox 2000.0).  The object was\nobserved to fade by approximately 1.6 magnitudes in R-band over 24\nhours in images taken by Corson, Gilmore and Wyse with the ARC 3.5-m\ntelescope at Apache Point.\nOn Dec 15.51 UT, R=22.1+-0.1 and on Dec 16.52 UT, R=23.7+-0.3.\nMagnitudes were calibrated based on R_F magnitudes for bright stars in\nthe field from the APM survey.  In this system we measure coordinates\nfor two reference stars.  Ref1 (11h56m25.75s, +65o12'0.7\") R=20.10 +-\n0.01, Ref2 (11h56m34.22s, +65o11'44.2\") R=20.78 +- 0.03.  Estimated\nzero point errors are approximately 0.3 magnitudes. No other object\nbrighter than approx R=21.5 was observed to vary.  Our R-band\nobservations on Dec 15 and Dec 16 were approximately coincident with\nthe reported MDM I-band detections by Halpern et al, (IAUC 6788)\ngiving an R-I color for this object of R-I = 1 +/- 0.4. Within the\nquoted measuring errors, the color is constant during the fading.\nImages are available at\nhttp://www.astro.washington.edu/deutsch/misc/grb971214/",
  "circularId": 8,
  "createdOn": 0,
  "email": "circulars@gcn.nasa.gov",
  "subject": "Untitled",
  "submitter": "circulars@gcn.nasa.gov"
}