{
  "bibcode": "2017GCN.20674....1C",
  "body": "B. E. Cobb (GWU) reports:\n\nUsing the ANDICAM instrument on the 1.3m telescope at CTIO, we\nobtained optical/IR imaging of the error region of GRB 170208B\n(GCN 20632, Siegel et al.) with a mid-exposure time of about\n5.1 hours post-burst (2017-02-09 03:38 UT). Total summed exposure\ntimes amounted to 36 minutes in I and 30 minutes in J.\n\nNo source is detected at the position of the X-ray afterglow\n(GCN 20635, Goad et al.) to approximate limiting magnitudes\nof I > 20.9 and J > 19.4. Magnitudes are calibrated using\nLandolt standard stars in I and 2MASS stars in J.",
  "circularId": 20674,
  "createdOn": 1487101697000,
  "email": "bcobb@gwu.edu",
  "subject": "GRB 170208B: SMARTS optical/IR observations",
  "submitter": "Bethany Cobb at GWU  <bcobb@gwu.edu>",
  "eventId": "GRB 170208B"
}