{
  "bibcode": "2013GCN.15630....1P",
  "body": "D. A. Perley (Caltech), A. Cucchiara (NASA/GSFC), and N. R. Tanvir (U.\nLeicester) report:\n\nWe imaged the position of GRB 131229A (Page et al., GCN 15627) using \nGMOS-S on the Gemini-South 8m telescope in i- an z-bands starting at \n07:33:07.5 UT (54 minutes after the GRB).  A total of 6 x 180s of \nimaging was acquired in each filter.\n\nSources detected in the reduced stack inside or close to the (onboard,\n5\" radius) XRT error circle (with J2000 positions) include:\n\nA (05:40:55.85, -04:23:40.6), a point source north of the error circle\nB (05:40:55.70, -04:23:43.4), an extended source\nC (05:40:55.92, -04:23:45.9), a faint, marginally detected source\n\nNo statement about variability or association with the GRB can be made\nat this time.  All of these sources are fainter than the P60 and USNO\nlimits.\n\nAn image of the field is posted to:\nhttp://www.astro.caltech.edu/~dperley/gcn/131229a/131229a_gmos.png",
  "circularId": 15630,
  "createdOn": 1388312542000,
  "email": "dperley@astro.caltech.edu",
  "subject": "GRB 131229A: Deep Gemini-South Imaging",
  "submitter": "Daniel Perley at Caltech  <dperley@astro.caltech.edu>",
  "eventId": "GRB 131229A"
}