{
  "bibcode": "2016GCN.19272....1Y",
  "body": "R Yates (MPE Garching) , T Kruehler (MPE Garching), J Greiner (MPE\nGarching) report on behalf of the GROND team:\n\nWe observed the field of GRB 160410A (Swift trigger 682269; Gibson et al.,\nGCN #19271) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008,\nPASP 120, 405) mounted at the 2.2 m MPG telescope at ESO La Silla\nObservatory (Chile).\n\nObservations started at 05:42 UT on 10-04-2016, 32mins after the GRB\ntrigger. They were performed at an average seeing of 1.8\" and at an\naverage airmass of 2.7.\n\nWe found a single point source within the 0.7\" Swift-UVOT error circle\nreported by Gibson et al. (GCN #19271) at\n\nRA (J2000.0) = 10h 02m 44.37s\n\nDEC (J2000.0) = +03d 28' 42.4\"\n\nwith an uncertainty of 0.5\" in each coordinate.\n\nBased on the first 4 min of total exposures in g'r'i'z' and JHK, we\nestimate preliminary magnitudes (all in AB system) of\n\ng' = 20.6 +/- 0.1 mag,\nr' = 20.5 +/- 0.1 mag,\ni' = 20.7 +/- 0.1 mag,\nz' = 20.5 +/- 0.2 mag,\nJ > 20.0 mag,\nH > 19.6 mag, and\nK > 18.0 mag.\n\nGiven magnitudes are calibrated against SDSS/2MASS zeropoints as well as\n2MASS field stars and are not corrected for the expected Galactic\nforeground extinction corresponding to a reddening of E_(B-V)=0.0180 mag\nin the direction of the burst (Schlafly & Finkbeiner 2011).",
  "circularId": 19272,
  "createdOn": 1460270059000,
  "email": "robyates@mpe.mpg.de",
  "subject": "GRB 160410A: GROND optical detection",
  "submitter": "Robert Yates at MPE/Swift  <robyates@mpe.mpg.de>",
  "eventId": "GRB 160410A"
}