{
  "bibcode": "2014GCN.17191....1P",
  "body": "D. A. Perley (Caltech) reports:\n\nI observed the location of GRB 141121A (Lien et al., GCN\n17075) using the imaging mode of the Low-Resolution Imaging\nSpectrometer (LRIS) on the Keck I 10-meter telescope between 10:55 and \n11:16 UT on 2014-12-18.  A short sequence of exposures in g, R, and \ni-bands was acquired.\n\nThe optical counterpart (Tanga et al., GCN 17078) is clearly detected in \nall filters. Calibrating relative to SDSS, the magnitude is:\n\ni = 23.96 +/- 0.07  (t = 27.3 days)\n\nThis measurement is significantly fainter than that reported by Toy et \nal. based on DCT observations on 2014-12-07, and the counterpart appears \npoint-like in 0.8-arcsecond seeing.  This suggests that the light is \nstill dominated by the afterglow.",
  "circularId": 17191,
  "createdOn": 1418904916000,
  "email": "dperley@astro.caltech.edu",
  "subject": "GRB 141121A: Keck observations",
  "submitter": "Daniel Perley at Caltech  <dperley@astro.caltech.edu>",
  "eventId": "GRB 141121A"
}