{
  "bibcode": "2009GCN.10008....1R",
  "body": "A. Rossi (Tautenburg), A. Rau, P. Afonso and J. Greiner (all MPE),\nreport on behalf of the GROND team:\n\nStarting October 10 at 23h45 UT (21.03hrs post-burst) GROND (Greiner et \nal. 2008, PASP 120, 405) mounted at the 2.2m ESO/MPI telescope\nat La Silla Observatory (Chile) imaged the field of GRB 091010\n(Donnarumma et al., GCN #10004) simultaneously in the g'r'i'z'JHK bands.\n\nWithin the Swift-XRT circle (Margutti et al., GCN #10006) we find a \nsingle source at:\nRA(J2000): 19:54:39.80\nDEC(J2000): -22:31:03.9\nwith uncertainties of 0.5\" in each coordinate.\n\nThe object is detected in the r' band with a preliminary AB magnitude of \n~22.2 calibrated against the GROND photometric zero point.  No correction\nfor Galactic foreground extinction of E(B-V)=0.14mag (Schlegel  et al.\n1998, Apj, 500, 525) was applied.  Strongly variable sky conditions and\nhigh seeing >2.5 arcsec) prevent reliable detections in others bands.",
  "circularId": 10008,
  "createdOn": 1255234295000,
  "email": "rossi@tls-tautenburg.de",
  "subject": "GRB 091010: GROND afterglow candidate",
  "submitter": "Andrea Rossi at TLS Tautenburg  <rossi@tls-tautenburg.de>",
  "eventId": "GRB 091010"
}