{
  "bibcode": "2016GCN.19629....1S",
  "body": "T. Schweyer, T.-W. Chen, and J. Greiner (all MPE Garching) report on behalf of the GROND team:\n\nWe observed the field of GRB 160625A (Swift trigger 701503; Maselli et al., GCN #19577) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at ESO La Silla Observatory (Chile).\n\nObservations started at 22:55 UT on 2016-06-26, 24.24 hrs after the GRB trigger.\nThey were performed through cirrus at an average seeing of 1.4\" and at an average airmass of 1.2.\n\nWe do not detect any source within the Swift-XRT error circle reported by Burrows et al. (GCN #19578) down to\n\ng > 22.6 mag,\nr > 23.9 mag,\ni > 22.5 mag,\nz > 22.6 mag,\nJ > 19.9 mag,\nH > 19.4 mag,\nK > 19.5 mag.\n\nGiven magnitudes are calibrated against USNO as well as 2MASS field stars and are not corrected for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V)=1.2 mag in the direction of the burst (Schlafly and Finkbeiner 2011).",
  "circularId": 19629,
  "createdOn": 1467286171000,
  "email": "jchen@mpe.mpg.de",
  "subject": "GRB 160625A: GROND upper limits",
  "submitter": "Ting-Wan Chen at MPE  <jchen@mpe.mpg.de>",
  "eventId": "GRB 160625A"
}