{
  "bibcode": "2010GCN.10812....1A",
  "body": "GRB 100526B: GROND Upper limits\n\nP. Afonso (MPE), A. Nicuesa (Tautenburg Obs.), R. Filgas and J. Greiner\n(all MPE Garching), report on behalf of the GROND team:\n\nWe observed the field of GRB 100526B (Swift trigger #423184 ; Siegel et\nal., GCN #10799) simultaneously in g'r'i'z'JHK with GROND (Greiner et al.\n2008, PASP 120, 405) mounted at the 2.2 m MPI/ESO telescope at La Silla\nObservatory (Chile).\n\nObservations started at 09:37 UT on March 27, 14.6 hours after the GRB\ntrigger, and were performed under strong wind.\n\nWe do not detect a source within the Swift-XRT error circle reported by\nKennea et al. (GCN #10802) in any of the GROND filters.\nStacked images with a total integration time of 28 minutes in JHK and 32\nminutes in g'r'i'z' yield the following preliminary 3-sigma upper limits:\n\n\ng' > 24.1\nr' > 24.2\ni' > 23.9\nz' > 23.8\nJ  > 22.7\nH  > 22.2\nK  > 21.3\n\n\nAll magnitudes given above are in the AB system and are based on the GROND\nzeropoints and 2MASS field stars. No correction has been applied for the\nGalactic foreground extinction corresponding to a reddening of E_(B-V)=\n0.012 in the direction of the burst (Schlegel et al. 1998).",
  "circularId": 10812,
  "createdOn": 1275041024000,
  "email": "pafonso@mpe.mpg.de",
  "subject": "GRB100526B: GROND Upper limits",
  "submitter": "Paulo M. J. Afonso at MPE  <pafonso@mpe.mpg.de>",
  "eventId": "GRB 100526B"
}