{
  "bibcode": "2016GCN.19616....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 160625B\n(GCN 19580, Dirirsa et al.) with a mid-exposure time of about\n32 hours post-burst (2016-06-27 06:51 UT). Total summed exposure\ntimes amounted to 36 minutes in I and 30 minutes in J.\n\nThe afterglow of GRB 160625B (e.g. GCN 19585, Melandri et al.;\nGCN 19588, Troja et al.; GCN 19589, Oates et al.) is detected\nin our images. Preliminary comparison to USNO-B1.0 stars in I\nand 2MASS stars in J indicates the following afterglow magnitudes:\n\nmid-exposure\ntime post-burst       I mag           J mag\n1.338 days            18.9+/-0.2      18.6+/-0.1",
  "circularId": 19616,
  "createdOn": 1467147378000,
  "email": "bcobb@gwu.edu",
  "subject": "GRB 160625B: SMARTS optical/IR afterglow observations",
  "submitter": "Bethany Cobb at GWU  <bcobb@gwu.edu>",
  "eventId": "GRB 160625B"
}