{
  "bibcode": "2009GCN..9109....1A",
  "body": "P. Afonso, F. Olivares, J. Greiner and T. Kruehler (MPE Garching) report\non behalf of the GROND team: \n\nGROND (Greiner et al. 2008, PASP 120, 405), mounted at the 2.2m ESO/MPI\ntelescope at La Silla Observatory (Chile), observed the field of GRB 090407\n(H. Ziaeepour et al. 2009, GCN #9101) simultaneously in the g'r'i'z'JHK\nbands. \n\nObservations started on April 7, at 23:34 UTC (13.1 h after the burst)\nand lasted for 87 minutes. \n\nIn stacked images of 24 min total integration time in griz and 20 min in \nJHK, we do not detect any new object inside the enhanced XRT error circle\n(Evans et al., GCN #9105), down to the following limiting magnitudes\n(all in the AB system): \n\ng' > 23.7\nr' > 24.1\ni' > 23.5\nz' > 23.3\nJ  > 21.6\nH  > 21.0\nK  > 20.4 \n\nThe upper limits have been obtained using GROND zero points and 2MASS\nfield stars as reference. No correction has been made for the expected\nextinction corresponding to E(B-V) of 0.07 mag.",
  "circularId": 9109,
  "createdOn": 1239157196000,
  "email": "pafonso@mpe.mpg.de",
  "subject": "GRB 090407: GROND upper limits",
  "submitter": "Paulo M. J. Afonso at MPE  <pafonso@mpe.mpg.de>",
  "eventId": "GRB 090407"
}