{
  "bibcode": "2013GCN.15170....1S",
  "body": "V. Sudilovsky, D. A. Kann, and J. Greiner (all MPE Garching) report on\nbehalf of the GROND team:\n\nWe observed the field of GRB 130903A (INTEGRAL trigger 6930; Mereghetti et\nal. 2013, GCN #15169) simultaneously in g'r'i'z'JHK with GROND (Greiner et\nal. 2008, PASP 120, 405) mounted at the 2.2 m MPG/ESO telescope at La\nSilla Observatory (Chile).\n\nObservations started at 07:07 UT on 03 Sep. 2013, 6.3 hours after the GRB\ntrigger, as soon as the GRB field became visible. They were performed at\nan average seeing of 1\".5 and at an average airmass of 1.7.\n\nBased on an image with an exposure time of 25 min in g'r'i'z' and 20 min\nin JHK, centered 7.37 hours after the GRB, we do not detect any\nuncatalogued sources within the 90 arcsec INTEGRAL error circle in\ncomparison to the SDSS and 2MASS catalogs.",
  "circularId": 15170,
  "createdOn": 1378210834000,
  "email": "kann@tls-tautenburg.de",
  "subject": "GRB 130903A: GROND Upper Limits",
  "submitter": "Alexander Kann at TLS Tautenburg  <kann@tls-tautenburg.de>",
  "eventId": "GRB 130903A"
}