{
  "bibcode": "2009GCN..9578....1K",
  "body": "T. Kruehler, F. Olivares, and J. Greiner (all MPE Garching) report on behalf\nof the GROND team:\n\nWe observed the field of GRB 090625B (Gotz et al., GCN #9572)\nsimultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120,\n405) mounted at the 2.2m MPI/ESO telescope at La Silla Observatory\n(Chile).\n\nObservations started on 26 June 2009 at 03:58 UT, 14.5 hours after the\nburst, continued until 05:58 UT and were performed under variable sky\nconditions. In stacked images of 75 min total integration time in griz and\n60 min in JHK, we do not detect any object within the XRT error circle\n(Mao et al., GCN #9573), down to the following limiting magnitudes (all in\nthe AB system):\n\ng' > 23.6\nr' > 23.8\ni' > 23.1\nz' > 22.7\nJ  > 21.5\nH  > 21.0\nK  > 20.5\n\nThese upper limits were derived using USNO-B1 and 2MASS field stars as\nreference. No correction has been made for the Galactic foreground\nextinction corresponding to E(B-V) of 0.02 mag (Schlegel et al., 1998).",
  "circularId": 9578,
  "createdOn": 1246008558000,
  "email": "kruehler@mpe.mpg.de",
  "subject": "GRB 090625B: GROND upper limits",
  "submitter": "Thomas Kruehler at MPE/MPI  <kruehler@mpe.mpg.de>",
  "eventId": "GRB 090625B"
}